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Re: why the hatred for the eddy 750 carb
[Re: president61]
#1577784
02/12/14 03:43 AM
02/12/14 03:43 AM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Yes there's been alot of neg reports on them. Enough that I thought there was a problem on the 750 assembly line at edelbrock (wrong sized drilled passages or?). I just bought one for $25 that the guy said was running OK in the past. I went ahead & bought a kit & a strip kit for it. I'll know soon.
live every 24 hour block of time like it's your last day on earth
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Re: why the hatred for the eddy 750 carb
[Re: RapidRobert]
#1577785
02/12/14 03:51 AM
02/12/14 03:51 AM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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It seems its not well designed to give a good AFR curve on most engines
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: why the hatred for the eddy 750 carb
[Re: Supercuda]
#1577788
02/12/14 11:58 AM
02/12/14 11:58 AM
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Joined: Jan 2007
Posts: 2,212
Minnesota
peabodyracing
top fuel
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top fuel
Joined: Jan 2007
Posts: 2,212
Minnesota
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I second that emotion. Have had two in recent years; one on a reasonably warmed over 440. Could not get it to quit a slight surging when driving at highway speeds. I tried everything I could think of. Finally put a 750 Holley on the car.
Second one I had was on a warmed over 350 Chevy. That carb worked perfectly, everytime, all the time, no matter what. My son had the car for a couple years and would always forget to put fuel stabilizer in when storing for the winter and it still worked perfectly.
Lead, follow or get the hell out of the way
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Re: why the hatred for the eddy 750 carb
[Re: dustergirl340]
#1577793
02/12/14 12:17 PM
02/12/14 12:17 PM
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Joined: Jan 2003
Posts: 6,497
N.E. Ohio
KillerBee
master
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master
Joined: Jan 2003
Posts: 6,497
N.E. Ohio
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Quote:
Had one on my Duster's original 340 and hated it...car never ran right no matter the tuning we did. Bolted on a 650 Holley and it was like night and day, throttle response was better and the car picked up 4 tenths with the (untuned) Holley. Never looked back.
As mentioned, for a mild street driver they can be decent. Had a 360 with one on it and it ran fine. I think there are better choices out there though.
Same here.
Installed a shiny new Edelbrock 750 on a street/strip 440 4 speed and it NEVER ran right.
Constant stumble off idle, surging under load, TERRIBLE performance compared to my previous Holley 750 DP.
Called Edelbrock tech countless times changed rods, jets and springs over and over and in the end was drilling out emulsion tubes....
Edelbrock techs tried their best and actually sent me parts for free to try with no luck.
They finally admitted the carb was best suited for a stock to very mild small block.
Took the Edelbrock carb off and sold it to buddy who put it on his stock 350 powered truck.
Put the old Holley 750 DP back on and had it tuned and running perfect in 20 minutes....night and day difference in performance and drivability. 
Live and learn....NO shiny Edelbrock carbs for me. 
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Re: why the hatred for the eddy 750 carb
[Re: president61]
#1577797
02/12/14 12:50 PM
02/12/14 12:50 PM
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Joined: Jan 2003
Posts: 12,028
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,028
Benton, IL.
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Recently, success with the CarterBrocks has been hit and miss. When they work right, they are very dependable. But when they don't, they can be a pain to get right. And tuning parts are more difficult to come by for a lot of guys. The two things that I have had to do to most of the CarterBrocks that I have messed with are; changing to stiffer step-up springs and adding weight to the counterweights on the secondary air valve. If you can find a clean used one for a good price, it might be worth it to try one. But if I were going to spend the coin for a new street carb, it would be the new Street Demon. 
Master, again and still
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577799
02/12/14 01:51 PM
02/12/14 01:51 PM
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Joined: Mar 2006
Posts: 9,825
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,825
MI, usa
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Quote:
Quote:
..i was told that the internal design only responds well to a strong
vacuumm signal.
... not for long duration cams
Ran one on my 440 with a .590, worked great (I do my own jetting though). Its now on my Duster with a 5.9 magnum.
I run a pair of them on my 572. Cam is 285@.050". They idle great with the stock primary calibration and 2 steps up in the secondarys. Power? It's been 9.25@147, 3340lbs.
Doug
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577800
02/12/14 01:51 PM
02/12/14 01:51 PM
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Joined: Jan 2003
Posts: 6,350
Aurora, Oh.
max_maniac
master
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master
Joined: Jan 2003
Posts: 6,350
Aurora, Oh.
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WOW ----  Look under the hood of just about any Mopar NSS car and you will find the 750's or the 800's. I'm talking cars that can run an index anywhere from a 12.50 et in 1/4 mile to an 8.75 et in the 1/4 mile  They work fine on my car and I run 9.60's and the most I have done with them is maybe change the jet size and the rods to be used. I also know of a few that have changed to a Holley from the 750 and actually went back to the eddy's. I also run one on my 70 Challenger 440 street car with no issues. Russ
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Re: why the hatred for the eddy 750 carb
[Re: max_maniac]
#1577801
02/12/14 01:55 PM
02/12/14 01:55 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
WOW ----
Look under the hood of just about any Mopar NSS car and you will find the 750's or the 800's. I'm talking cars that can run an index anywhere from a 12.50 et in 1/4 mile to an 8.75 et in the 1/4 mile
They work fine on my car and I run 9.60's and the most I have done with them is maybe change the jet size and the rods to be used. I also know of a few that have changed to a Holley from the 750 and actually went back to the eddy's. I also run one on my 70 Challenger 440 street car with no issues.
Russ
yes that's because you run TWO and you HAVE to use them. If you were able to run two holleys in NSS you would and your times would be better.
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Re: why the hatred for the eddy 750 carb
[Re: Mr.Yuck]
#1577802
02/12/14 02:05 PM
02/12/14 02:05 PM
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Joined: Jan 2003
Posts: 6,350
Aurora, Oh.
max_maniac
master
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master
Joined: Jan 2003
Posts: 6,350
Aurora, Oh.
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Quote:
Quote:
WOW ----
Look under the hood of just about any Mopar NSS car and you will find the 750's or the 800's. I'm talking cars that can run an index anywhere from a 12.50 et in 1/4 mile to an 8.75 et in the 1/4 mile
They work fine on my car and I run 9.60's and the most I have done with them is maybe change the jet size and the rods to be used. I also know of a few that have changed to a Holley from the 750 and actually went back to the eddy's. I also run one on my 70 Challenger 440 street car with no issues.
Russ
yes that's because you run TWO and you HAVE to use them. If you were able to run two holleys in NSS you would and your times would be better.
I can run 2 Holley's in AFX which is the 9.75 and quicker classes. No need to change them though as the eddy's are doing just fine - like I said even on cars going 8.75 and quicker!! There may be some gain in the Holley's but I don't think it would be significant enough to change an index by .25 et unless you were very close to start with.
Russ
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Re: why the hatred for the eddy 750 carb
[Re: Mr.Yuck]
#1577808
02/12/14 05:47 PM
02/12/14 05:47 PM
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Joined: Mar 2006
Posts: 9,825
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,825
MI, usa
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Quote:
Quote:
WOW ----
Look under the hood of just about any Mopar NSS car and you will find the 750's or the 800's. I'm talking cars that can run an index anywhere from a 12.50 et in 1/4 mile to an 8.75 et in the 1/4 mile
They work fine on my car and I run 9.60's and the most I have done with them is maybe change the jet size and the rods to be used. I also know of a few that have changed to a Holley from the 750 and actually went back to the eddy's. I also run one on my 70 Challenger 440 street car with no issues.
Russ
yes that's because you run TWO and you HAVE to use them. If you were able to run two holleys in NSS you would and your times would be better.
Not true, we can run Holleys. They aren't any faster. Guys that use Holley's claim better 60 ft. The difference isn't much .02-.03. In my experience the Eddys out MPH the Holleys. Either way they're very close.
Doug
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Re: why the hatred for the eddy 750 carb
[Re: president61]
#1577810
02/12/14 06:18 PM
02/12/14 06:18 PM
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Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
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My dislike of all the Carter AFB based carbs is the lazy accelerator pump, way too much throttle travel before you get a healthy
Holley pump shots are more positive.
The INTERNET, the MISinformation superhighway
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Re: why the hatred for the eddy 750 carb
[Re: president61]
#1577814
02/13/14 03:52 AM
02/13/14 03:52 AM
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Quote:
over the last few years been seeing some negative comments about the eddy 750 carb. whats wrong with them? was thinking of getting one for my fury
The few that I have used were OK. The float level adjustment is really important on those carbs, and the only way to adjust it is by removing the top.
When tuning them, it is really tempting to just throw different rods at it, which is more likely to get the carb out of tune, then changing the jets.
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Re: why the hatred for the eddy 750 carb
[Re: 451Mopar]
#1577815
02/13/14 04:04 AM
02/13/14 04:04 AM
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Joined: Jan 2003
Posts: 27,421
Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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The few 750's I delt with were all lean the way they came. I did some tunning and they worked fine after that. Here is what my brother says about them as he runs 2 of them on his 64 Fury wedge NSS car. He is not crazy about running just one on a car but he loves running two of them on his car.  Ron
Last edited by 383man; 02/13/14 04:05 AM.
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Re: why the hatred for the eddy 750 carb
[Re: 383man]
#1577816
02/13/14 04:16 AM
02/13/14 04:16 AM
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Quote:
The few 750's I delt with were all lean the way they came. I did some tunning and they worked fine after that. Here is what my brother says about them as he runs 2 of them on his 64 Fury wedge NSS car. He is not crazy about running just one on a car but he loves running two of them on his car. Ron
My Carter Comp AFB that I had on my 383 would alaways run lean no matter what pump, nozzles, jets or rods, then I adjusted the float level higher than spec so the bowls would have more fuel in them, and it finally went rich. After fixing the float level issue, I ended up back to almost the stock jetting.
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Re: why the hatred for the eddy 750 carb
[Re: dvw]
#1577818
02/13/14 05:22 PM
02/13/14 05:22 PM
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Joined: Feb 2003
Posts: 10,201
Someplace you aren't
SomeCarGuy
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 10,201
Someplace you aren't
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I've tuned and had good luck with other Eddys, AVS, TQ, and Holley offerings. The 750 Eddy was trouble on any number of engines. They just don't seem to respond to changes like other carbs. You can get them to run better after some work out of the box, but not a easy as virtually any other carb. Then you might even be lucky enough to get one that has mystery problems with signal. I would rather put a carb that works right on it and be done. No reason to fumble around tuning a carb when you could be driving the car.
I want my fair share
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Re: why the hatred for the eddy 750 carb
[Re: MY340]
#1577820
02/14/14 08:46 AM
02/14/14 08:46 AM
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Joined: Jan 2003
Posts: 5,890
Athens, Greece
Pyper70
master
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master
Joined: Jan 2003
Posts: 5,890
Athens, Greece
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I used to be all about Holley...had a 2bbl 500, a 4bbl 390, an 800...They started stumbling over each other...the 500 and the 390 were in different stages of a Mod Slant 6. I couldn't get the curve correct but an OOTB Eddy 500 took care of it and then some fine tuning down the road. 70 Charger with the 800 Holley, Choke horn milled off, left me stranded one too many time to the point where I had it professionally rebuilt to no avail. I had to get that Charger to a car show...removed the 500 from the slant, bolted it to the 440 and it was NIGHT AND DAY and I was under carb'd. When we were finishing up the 69's restoration, we opted for the 750 Eddy. It ran and performed, always turnkey, never had to tinker with it. The thing most people forget when installing a carb is A/F ratio...Drill your exhaust people, pay the money for the Wideband. You'll save time and money in the long run. the 750 is now on a friends car and it woke up his 58 Plymouth from the Holley that was on there. my 69' 440 has Dual 500s now and running sweet....I can press the pedal so far and go for a nice drive....and if I wanna get stupid I can go sideways with all 8 dumping fuel in  )
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577822
02/14/14 12:54 PM
02/14/14 12:54 PM
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Joined: Feb 2003
Posts: 10,201
Someplace you aren't
SomeCarGuy
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 10,201
Someplace you aren't
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It says something when guys who can get any other carb to work right can't get the 750 Eddy to go like it should. What does it say about a carb if you would need a wideband to tune it, when that isn't necessary to tune other carbs on the same engine?
I'm not saying a wideband isn't a good thing, but I am saying that points to an issue with one particular style of carb that requires one to tune.
I want my fair share
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577824
02/14/14 04:24 PM
02/14/14 04:24 PM
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Joined: Apr 2012
Posts: 18,880
-
RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
-
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Quote:
Quote:
I eventually got it working in a reasonable manner but it was still weak sauce compared to the TQ that proceeded it. The TQ had better transitions with much fewer lean/rich swings when going from one circuit to another.
Thank-You...
When I hear the word 'Holley', I run...
What a PITA...
At its most simplistic, look at an exploded view of a Holley, and compare that to a Carter...
There's a whole bunch'a Carter's runnin' in these parts...
And they RUN...
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Re: why the hatred for the eddy 750 carb
[Re: 71birdJ68]
#1577825
02/14/14 04:47 PM
02/14/14 04:47 PM
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Joined: Jan 2003
Posts: 74,977
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,977
U.S.S.A.
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Quote:
He never did say which series he had.
There is no 750 in the Thunder series only 650 and 800. the thunder series would be a better choice for a street car wit hthe tunable secondary air door.
Dwayne Porter ran a performer series in a dyno test on his stocker 383 , it's in the tech archive , it was a turd , he swapped on the carter version of the same carb and it ran so much better , Ebrock has the carb made to their specs and it would appear that it is a different internal calibration than the carter version.
I have one of the old carter versions , great carb , I HAD the ebrock 
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Re: why the hatred for the eddy 750 carb
[Re: RSNOMO]
#1577826
02/14/14 05:26 PM
02/14/14 05:26 PM
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Joined: May 2003
Posts: 1,751
Graham, WA
Polarapete
top fuel
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top fuel
Joined: May 2003
Posts: 1,751
Graham, WA
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I have some experience with the Eddy 750 and it was not good, but I think my problems were self-inflicted. I built the engine in my '64 Polara from a PAW kit and I literally put it together OOTB. It had stock type "346" heads, 2.08 x 1.74 Valves, 2355F .030 pistons, steel crank, heavy 6-pack rods, the MP 284* x .484 Hydraulic cam with Rhoads lifters, MP Aluminum low profile manifold. The block was decked and the heads were milled enough so much so that I had to have the manifold cut to fit. I used the '68 to '70 Magnum exhaust manifolds that were on the car and the rest of the exhaust was as I got it in 1997. I first used a Eddy 600 CFM carb and it ran very well, I even got 14 mpg on one leg of the first trip to Reno. And then I started tinkering with it, I changed to the RoadRunner Repro cam & kit to get better driveability, changed to the "452" heads with 2.14x1.81 valves and mild port work, added the Eddy 750 and had the DC Electronic Distributor re-curved. I know now that I went the wrong direction. I should have changed to a higher than 1964 stall converter and opened up the exhaust to improve air flow through the engine. That would have given me the drivability and performance I wanted and would have cost a lot less than what I had spent. Finally I sold the Eddy 750 to a friend and went with a Barry Grant 750 Vacuum Secondary and really saw no improvement. My friend put a kit into the Eddy 750 and is very pleased with the way his basically stock 440 runs in his '66 Fury Convert. The Polara hardly ever left my garage and I sold it in 2010 with a new Eddy 600 CFM. It now lives in Chicago. 
1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction
1998 Ram 2500 QuadCab, new daily driver.
2008 Honda Element
2014 Carry-On 7x14 Cargo Trailer
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Re: why the hatred for the eddy 750 carb
[Re: JohnRR]
#1577827
02/14/14 06:10 PM
02/14/14 06:10 PM
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Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan
I Live Here
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I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
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Quote:
Dwayne Porter ran a performer series in a dyno test on his stocker 383 , it's in the tech archive , it was a turd , he swapped on the carter version of the same carb and it ran so much better , Ebrock has the carb made to their specs and it would appear that it is a different internal calibration than the carter version.
Two words- Strip Kit.
No calibration is perfect for all engines, if you think the carb is a "sealed unit" then you might be the problem. This is true with any carb, Holley hides its shortcomings by running rich to cover the bad spots.
Carters are very easy to setup, after reading the book on Carters and how they operate it was very easy to dive in and make changes to suit my needs and have a carb with razor sharp throttle response, good mpg with excellent WOT. Just change one circuit at a time and when its perfect move onto the next.
"I think its got a hemi"
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577828
02/14/14 06:48 PM
02/14/14 06:48 PM
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Joined: Jan 2003
Posts: 74,977
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,977
U.S.S.A.
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Quote:
Quote:
Dwayne Porter ran a performer series in a dyno test on his stocker 383 , it's in the tech archive , it was a turd , he swapped on the carter version of the same carb and it ran so much better , Ebrock has the carb made to their specs and it would appear that it is a different internal calibration than the carter version.
Two words- Strip Kit.
No kidding, I also have the carter book , the performer series is a mediocre carb best suited for use on 350 chevies ...
I'm pretty sure that Dwayne knows his way around a carb but I'll pass on that sage bit of advice in case he misses this thread
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577830
02/14/14 09:52 PM
02/14/14 09:52 PM
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Joined: Nov 2006
Posts: 1,456
oklahoma
forphorty
pro stock
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pro stock
Joined: Nov 2006
Posts: 1,456
oklahoma
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Quote:
Quote:
I'm pretty sure that Dwayne knows his way around a carb but I'll pass on that sage bit of advice in case he misses this thread
1) The way it was written there is an implication that the carb was not rejetted, i.e. "it was swapped out" The castings are virtually the same. I have rebuilt both Edelbrock and Carter AFB carburetors with excellent results.
2) Dyno testing which consists of just WOT pulls should have the fewest problems. Care to point us in the direction of this article? It contradicts what I and others experience including class racers who state the difference between Holleys and AFB's is slight. I'd like to read the details myself rather than from someone else second hand.
http://www.moparts.org/Tech/Archive/bb/25.html
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Re: why the hatred for the eddy 750 carb
[Re: forphorty]
#1577831
02/15/14 12:25 AM
02/15/14 12:25 AM
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Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan
I Live Here
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I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
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"Ebrock 750, #1407 with stock calibration"
"it was calibrated to the specs in the catalog."
He never changed the calibration, you were saying?
What I stated holds true, carburetors are NOT sealed units, they need proper jetting and settings for the engine they are to be used on.
Holleys get away with more because they are setup rich out of the box.
"I think its got a hemi"
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577832
02/15/14 03:02 AM
02/15/14 03:02 AM
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Joined: Jan 2003
Posts: 74,977
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,977
U.S.S.A.
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Quote:
What I stated holds true, carburetors are NOT sealed units, they need proper jetting and settings for the engine they are to be used on.
The problem is there are more people that think they are sealed units than don't.
He had ZERO intention of using that carb , it was just a test to see where it was out of the box. Did you skip over the part where he swapped on the CARTER 750 , which you state is the SAME CARB, and the engine didn't run like a piece of crap ? But again ZERO INTENTION of running that carb either. A strip kit is just jets, rods and springs, it does nothing if the carb itself, with incorrect size internal passages, is the problem.
I still stand by my thoughts and comments on this particular carb, it sux and I no longer waste money or time with one and will steer someone away from it if I can ... no matter if SOME have had good luck with it or not. There are better carbs out there.
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Re: why the hatred for the eddy 750 carb
[Re: JohnRR]
#1577833
02/15/14 05:34 AM
02/15/14 05:34 AM
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Joined: Aug 2003
Posts: 43,127
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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I think most of you guys commenting on the Eddy 750 forget who Edlbrock sells a majority of the carbs to, it is not Mopar people  Most standard replacement carbs are calibrated and designed to be ran on Chevy motors  I have tried to tune a 750 Holley D.P. carb. on a 383 SB Chevy by reading the spark plug,, when I got it tuned to make the spark plug look like I would like to see in any of the Mopars I've tuned the owner said it didn't run as good as it did when the spark plugs where black we took it to the track, LACR and he was right, the SB Chevy wanted to be a lot richer on the jetting than any of the other Mopar motors with a 750 Holley D.P. wantedto be at the track I bought a Carb. Shop 1050 Dominator that they had dyno tested on one of thier dyno mule motors, 408 SB Chevy with some power and torque, when we put that same carb. on one of my bracket 440 motors is was way to fat, calibrated all wrong for the 440 A stock OOTB Holley List # 9375 made around twenty HP and similar Ft lbs. of torque more than thier wazzu custom built carb. did It is all about the tune and calibration to get any carb. dialed in for your motor BTW, a wide ban is one of my new best tools
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: why the hatred for the eddy 750 carb
[Re: JohnRR]
#1577834
02/15/14 09:04 AM
02/15/14 09:04 AM
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Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan
I Live Here
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I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
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Quote:
The problem is there are more people that think they are sealed units than don't.
Then they are very much in the wrong hobby and are in the vast minority, perhaps its just were you live.
Quote:
He had ZERO intention of using that carb , it was just a test to see where it was out of the box.
Wait- Did you not state "he knew his way around a carburetor" and now you are stating something else? huh.
Quote:
Did you skip over the part where he swapped on the CARTER 750 , which you state is the SAME CARB, and the engine didn't run like a piece of crap ?
You have reading comprehension issues my friend, I stated they were virtually the same castings. Jetting, metering rods and spring rates make a huge difference.
Quote:
But again ZERO INTENTION of running that carb either. A strip kit is just jets, rods and springs, it does nothing if the carb itself, with incorrect size internal passages, is the problem.
And you know this how? You picked a poor example "as proof" and display a bit of ignorance about how the AFB's are constructed. I have a problem taking your word on the subject as to the shortcoming of this particular carburetors design. On the other hand I own several Edelbrock and Carter AFB's and they all work great and have rebuilt and tuned several hundred over the decades for a living (including Holleys, TQ's and AVS not to mention non-mopar stuff like quadrajets and even the horrible VV carb from Ford!) for other people without issue.
A single example in which the user freely admits making no changes to the unit is not a sweeping indictment on Edelbrock carbs.
I find it amusing that people will spend vast amounts of time on Holley carbs "drilling this circuit" or "swapping out this air bleed" or "trying this modification" but won't spend some time learning how AFB's work which are the simplest of devices.
But that's ok, more for me ;-)
"I think its got a hemi"
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577835
02/15/14 12:06 PM
02/15/14 12:06 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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You are beating your head against the wall. JohnRR is a rock, if something doesn't conform then it's not him, its whatever.
Most guys who think they know how to tune a carb have no clue, especially the ones that just slap a Holley on and go cause it's "perfect". Guess what Holley deliberately tuned those carbs for that "I know how to tune a carb, but don't" crowd. Just like JRR.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577838
02/15/14 01:23 PM
02/15/14 01:23 PM
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Joined: Jan 2003
Posts: 9,436
Blair County,PA
62maxwgn
master
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master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
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90% of what I have run over the last 40 + years have been AFB/AVS/TQ in just about any configuration,single carb/cross ram/long ram and 2x4,"NEVER" had any tuning issues with any combination.Only variance from Carter was/is the 6pk cars I have owned then and now.I read post after post of some of you who don't have a clue what is going on,then ask a question and get a dozen different answers,and you are still at square one.There are reliable sources for just about anything,find one and get it right,you will be much happier at days end. If you want a prime example.go to FBBO and look at a few of the threads on overheating issues,it will boggle your mind. My sig pretty much sums up my thoughts,also the phrase "been there,done that" goes back a long way with me,eventually you get the picture. Everybody take a deep breath and have a great day !!
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577840
02/15/14 02:00 PM
02/15/14 02:00 PM
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Joined: Feb 2005
Posts: 222
Onalaska, Wi
sixtyninefuchs
enthusiast
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enthusiast
Joined: Feb 2005
Posts: 222
Onalaska, Wi
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I have a stock 1407 edelbrock carb on a street hemi with an m1 (crate engine intake) It starts great, runs great, and is fast. It has run 12.82 @ 107 mph 4120# I suppose a holley would get me in the 11's!!!! 
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Re: why the hatred for the eddy 750 carb
[Re: sixtyninefuchs]
#1577841
02/15/14 02:25 PM
02/15/14 02:25 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
I have a stock 1407 edelbrock carb on a street hemi with an m1 (crate engine intake)
It starts great, runs great, and is fast.
It has run 12.82 @ 107 mph 4120#
I suppose a holley would get me in the 11's!!!!
no but I bet it'd run 12.55 or better.
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577842
02/15/14 04:30 PM
02/15/14 04:30 PM
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Joined: Apr 2012
Posts: 18,880
-
RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
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Quote:
I find it amusing that people will spend vast amounts of time on Holley carbs "drilling this circuit" or "swapping out this air bleed" or "trying this modification" but won't spend some time learning how AFB's work which are the simplest of devices.
BAM...
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Re: why the hatred for the eddy 750 carb
[Re: RSNOMO]
#1577843
02/15/14 04:47 PM
02/15/14 04:47 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Quote:
I find it amusing that people will spend vast amounts of time on Holley carbs "drilling this circuit" or "swapping out this air bleed" or "trying this modification" but won't spend some time learning how AFB's work which are the simplest of devices.
BAM...
I've never drilled this or swaped air bleeds, as a matter of fact Most of the holleys I've run haven't even had air bleeds. I've swaped out Eddy 750's twice for 750 DP's, and a carter 625 comp series for a 750 and evey time the car dropped et w/ no other mods. Mild 440 w/ brand new Eddy 750 (tuned) went from 13.11 (at best) to 12.90 w/ a 20+y/o holley and a rebuild kit. 383 went from 12.89 to 12.68 with a 750DP tuned for a 360, and a 340 went from 14.20 to 13.82 w/ a 750HP.
Go to any car show and look under the hood and you'l find lots of Eddy/Carters, go to the track and look under the hood and you'll see lots of Holleys. Just how it is.
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Re: why the hatred for the eddy 750 carb
[Re: Mr.Yuck]
#1577846
02/15/14 06:00 PM
02/15/14 06:00 PM
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Joined: Sep 2004
Posts: 22,873
Chicken coop
dustergirl340
Chicken Little
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Chicken Little
Joined: Sep 2004
Posts: 22,873
Chicken coop
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Quote:
Quote:
I have a stock 1407 edelbrock carb on a street hemi with an m1 (crate engine intake)
It starts great, runs great, and is fast.
It has run 12.82 @ 107 mph 4120#
I suppose a holley would get me in the 11's!!!!
no but I bet it'd run 12.55 or better.
I run 12.50's @ 105 MPH
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577847
02/15/14 06:07 PM
02/15/14 06:07 PM
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Joined: Apr 2012
Posts: 18,880
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RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
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Quote:
Quote:
I don't know how long gdonovan has been doing carbs, but I suspect a while...
A long time, hell I'm even factory Mopar trained for Thermoquads, Carter BBD's and Mikuni carburetors.
A lost art now, clearly some folks just want "bolt on and go" pieces that work "most of the time" fat and safe which is fine by me.
Gives me the advantage in a race.
Perhaps you could give these guys some advice, there seems to be some issues with an "out of the box" Holley.
Oh no...
I avoid Holleys like the plague...
Last one I messed with was after it caused an engine fire(imagine that)...
BBD's...
Memories...
(One of the first was on a 'Super-Six' many years ago...
In a '78 Fury...
That car would walk on a whole buncha' 318's)...
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Re: why the hatred for the eddy 750 carb
[Re: RSNOMO]
#1577848
02/15/14 06:33 PM
02/15/14 06:33 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Your three examples trump everything that's been listed here???
I don't know how long gdonovan has been doing carbs, but I suspect a while...
I've been playing with Carter's for 35 years...
It's all been for naught???
Tell you what, come over here and walk through the pits at the Pure Stock Drags...
I'm sure you'll get any pertinent info you might need regarding Carter's if you don't like what you see here...
You are funny, sure any carb can be tuned. Seems like the only people here that can get them working are "experts". I'm no expert. I have used both (still have a Strip kit in the garage), the Holley works better for me and for MOST. Sure you can make anything run, how much time and labor? It's called pure stock for a reason, walk thru a any other line and you'll see mostly Holleys or Holley based carbs. And what examples do you have? One artical that used a 100 different combos? Or the guy that has two carters? Have you ever raced a car one weekend w/ one carb and another the next? I took an old beat up Holley I bought for $30 rebuilt it almost to stock and ran better et and MPH than an Eddy I (and a master mechanic friend) spent many track hours tuning. I was very happy when the car went 13.11. But even happier when it went 12.90.
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577849
02/15/14 06:35 PM
02/15/14 06:35 PM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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Quote:
Quote:
The problem is there are more people that think they are sealed units than don't.
Then they are very much in the wrong hobby and are in the vast minority, perhaps its just were you live.
Gary, I will say, even in these parts there are a lot of people with older cars who don't work on them, and certainly many who won't open up a carb. Some of them are my friends, and no matter how much I try I just can't get them to open up their carbs, recurve their distributors, etc.
I had a friend with the 750 Eddy on his Road Runner. It ran OK, but generally felt flat and lacked sharp response, no matter what was done to it.
Another buddy who HATES Holleys used to have an 800 and 850 Double Pumper on his high 11 second dart. He swapped to an Eddy 800 when they came out and said that the difference in throttle response was insane. He had played with the Holleys alot and the Eddy killed it OOTB. In fact, he refuses to touch anything on the 800 because he doesn't want to screw up what he has. I myself prefer Holleys, but I value his opinion. And I've been in the car, it hits like a MFer when you snap the throttle open from a roll.
My first friend swapped his 750 for an 800 AVS on his Road Runner and it ran much better right OOTB and even better with tuning. It is MUCH thirstier though, but who cares about MPG.
I generally like Holleys but if given a Carter/Edelbrock I don't really care, they all need fine tuning and all can work well. I think the issues with the 750 stem from the calibrations internal to the carb. But one thing is for sure it seems much more troublesome than most other carbs.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: why the hatred for the eddy 750 carb
[Re: GTX MATT]
#1577851
02/15/14 06:45 PM
02/15/14 06:45 PM
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Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan
I Live Here
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I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
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Quote:
Gary, I will say, even in these parts there are a lot of people with older cars who don't work on them, and certainly many who won't open up a carb.
This isn't limited to carburetors as you noted, when I was running Relentless Performance there was a sizable number of people who would just throw a car together and declare it done.
Tweaking the cam timing, distributor timing, fuel pressure, injector size, etc, etc was a concept they could or would not embrace.
In my experience that's where the real gains are, honing the car till it runs its best. At the other end of the spectrum, I attended a dyno event in Ohio where I worked on a guys calibration and made over 30 pulls!
There was literately nothing left on the table when we were done.
"I think its got a hemi"
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Re: why the hatred for the eddy 750 carb
[Re: dustergirl340]
#1577853
02/15/14 08:01 PM
02/15/14 08:01 PM
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Joined: Feb 2005
Posts: 222
Onalaska, Wi
sixtyninefuchs
enthusiast
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enthusiast
Joined: Feb 2005
Posts: 222
Onalaska, Wi
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Quote:
Quote:
Quote:
I have a stock 1407 edelbrock carb on a street hemi with an m1 (crate engine intake)
It starts great, runs great, and is fast.
It has run 12.82 @ 107 mph 4120#
I suppose a holley would get me in the 11's!!!!
no but I bet it'd run 12.55 or better.
I run 12.50's @ 105 MPH
You win the race.......but I got ya by exactly 100hp 
3200# duster 105mph = 293hp........4120# charger 107mph = 393hp
750 edelbrock can support decent power if you can actually tune your car.
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Re: why the hatred for the eddy 750 carb
[Re: dustergirl340]
#1577856
02/15/14 08:33 PM
02/15/14 08:33 PM
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Joined: Apr 2012
Posts: 18,880
-
RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
-
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Quote:
mine's a pretty fat Duster at 3,450
My A-body was 3150 with me behind the wheel...
A little 'weight ' in the boot???
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Re: why the hatred for the eddy 750 carb
[Re: RSNOMO]
#1577858
02/15/14 09:09 PM
02/15/14 09:09 PM
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Joined: Sep 2004
Posts: 22,873
Chicken coop
dustergirl340
Chicken Little
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Chicken Little
Joined: Sep 2004
Posts: 22,873
Chicken coop
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Quote:
Quote:
mine's a pretty fat Duster at 3,450
My A-body was 3150 with me behind the wheel...
A little 'weight ' in the boot???
Our '76 Dart weighs 3,400 pounds. Our '72 Challenger weighs 3,340 pounds. lol...the later A-bodies are pretty heavy. But our '65 Dart should weigh in at 2,900 race weight.
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Re: why the hatred for the eddy 750 carb
[Re: dustergirl340]
#1577859
02/15/14 10:52 PM
02/15/14 10:52 PM
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Joined: Jan 2004
Posts: 8,236
fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,236
fredericksburg,va
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Quote:
Quote:
Quote:
mine's a pretty fat Duster at 3,450
My A-body was 3150 with me behind the wheel...
A little 'weight ' in the boot???
Our '76 Dart weighs 3,400 pounds. Our '72 Challenger weighs 3,340 pounds. lol...the later A-bodies are pretty heavy. But our '65 Dart should weigh in at 2,900 race weight.
My 70 duster 383 auto 8 3/4 all steel one car seat and roll bar weighted 2980. What you got lead floor mats?
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Re: why the hatred for the eddy 750 carb
[Re: dustergirl340]
#1577863
02/15/14 11:26 PM
02/15/14 11:26 PM
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Joined: Jan 2004
Posts: 8,236
fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,236
fredericksburg,va
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Quote:
lol! No lead floor mats or roll bar. And it's a small block! No Jimmy Hoffa in the trunk either. I actually thought maybe the first scale was wrong but I weighed it again at Norwalk and it was within 10 pounds of the first scale... :/
Wow, my buddys car 68 Dart 440 full cage dana hinged fiberglass hood and bumper weighed 3020 on the scales at Maple Grove.Now these where race cars but only things removed where seats,heater box,wiper motor. Glass and all the hardware still there. Sorry if this got off topic couldn't resist.
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577864
02/15/14 11:32 PM
02/15/14 11:32 PM
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Joined: Sep 2004
Posts: 22,873
Chicken coop
dustergirl340
Chicken Little
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Chicken Little
Joined: Sep 2004
Posts: 22,873
Chicken coop
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Quote:
Quote:
Our '76 Dart weighs 3,400 pounds. Our '72 Challenger weighs 3,340 pounds. lol...the later A-bodies are pretty heavy.
My '74 Duster is 3600 lbs with me on board, they are a tad on the porky side and that is with aluminum rims.
Whew! Thanks for redeeming me!
(Sorry about the subject change guys...back to your regularly scheduled Eddy/Carter vs. Holley debate, I'm finding it very interesting.)
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Re: why the hatred for the eddy 750 carb
[Re: Mr.Yuck]
#1577871
02/16/14 01:51 PM
02/16/14 01:51 PM
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Joined: Nov 2009
Posts: 2,275
Desert Tracker
HYPER8oSoNic
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,275
Desert Tracker
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Basically, it's a matter of personal choice and comfort. For example Dustergirls' 340 is a "GIANTKILLER" with the Holley, which is great for her combo. Mr. Yuck prefers the "six gun" for his 440, which is a very LETHAL combo! However, the Street HEMIS and Max-Wedges ran great with Carter AFB"s and were extremely tunable. The fact is, yes Holleys' are a bit more "user-friendly" when it comes to tuning than Carters since there are more of them in circulation and the racing industry has had MORE development time with them (Holleys). Carter AFB's can and will run as good as a Holley, IF, they are tuned CORRECTLY for the individual motor combination you have. They are more sensitive to compression, cam and ignition timing, since their secondaries work off of engine vacuum/airflow! AVS's and TQ's are more forgiving, with different engine combinations, mainly due to the spring loaded "air door" secondaries. For most street and street/strip motors Carters can handle most applications (again, TUNED CORRECTLY), but Holley continues to be the standard in street/strip and "all out" racing! 
"Stupidity is Ignorance on Steroids"
"Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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Re: why the hatred for the eddy 750 carb
[Re: CokeBottleKid]
#1577872
02/16/14 02:37 PM
02/16/14 02:37 PM
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Joined: Nov 2009
Posts: 2,275
Desert Tracker
HYPER8oSoNic
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,275
Desert Tracker
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Quote:
AFBs are for street rods and cruisers, holleys are if you want performance. You will ALWAYS leave something on the table with an AFB.
That may be a valid statement to some, but AFB's can deliver performance too, again IF TUNED RIGHT to the engine combination! Leaving something on the table, you say?
It's called a "trump card" when AFB's are used in dual 4bbL
setups. Always keep an "extra" 10% more, in the back pocket, for when the race is tight (neck to neck)! FWIW, I like Holleys ..but.. I LOVE Carters.
"Stupidity is Ignorance on Steroids"
"Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577873
02/16/14 03:55 PM
02/16/14 03:55 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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"480 calculated flywheel hp isn't too shabby considering he is grossly undersized on carburetor CFM, I bet it has wicked throttle response." You hit the nail on the head. He'd make much more power with a better carb. A 750DP or even better HP would give him much better performace. Even a thunder 800 would.. I'm glad somebody brought up Thermoquads. I love them, however finding a good one seems hard these days. FWIW a big 4bbl would probably run better on my car, but I've always wanted a 6-pack, I can't afford a hemi 
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Re: why the hatred for the eddy 750 carb
[Re: HYPER8oSoNic]
#1577874
02/16/14 04:04 PM
02/16/14 04:04 PM
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Joined: Jan 2003
Posts: 12,028
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,028
Benton, IL.
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This is a really sophomoric argument.  Arguing which 1950s technology is superior. The Holley 4150 platform first saw wide service on Phord's Thunderbird. And AFB stands for Aluminum Four Barrel because they dated to a time when carbs had cast iron bases. The CarterBrocks are simpler carbs that have far fewer sizes with very few choices. But, when right, they are extremely dependable. The Holley style platform has far more sizes available. And a ton of different combos in each of those sizes. As far as tuning, I don't think that there are a heck of a lot more guys that understand carbs today than there were 40 years ago. So the way it runs their car OOTB determines whether it rocks or is crap. More luck of the draw than precise planning or tuning or even brand. Having said that, I am getting ready to buy the carb designed by a former Carter engineer working for a subsidiary of Holley; the new Street Demon. That way we all win!
Master, again and still
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Re: why the hatred for the eddy 750 carb
[Re: DaveRS23]
#1577875
02/16/14 04:15 PM
02/16/14 04:15 PM
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Quote:
The CarterBrocks are simpler carbs that have far fewer sizes with very few choices. But, when right, they are extremely dependable.
For tuning, Edelbrock has 32 different metering rods, at least 16 different jet sizes, 5 different step-up springs, and at least 3 different accelerator discharge orface sizes. The old Cater strip kit adds another 6 metering rods.
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Re: why the hatred for the eddy 750 carb
[Re: HYPER8oSoNic]
#1577876
02/16/14 04:19 PM
02/16/14 04:19 PM
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Joined: Jan 2003
Posts: 4,395
The Pale Blue Dot
Skeptic
master
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master
Joined: Jan 2003
Posts: 4,395
The Pale Blue Dot
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I'm agnostic in this  . They all have the same type of circuits and both have +/-. Holleys have power valves that leak or blowout and the carb has to be pulled, drained and flipped to change, the Carter metering rod setup is bulletproof and easy to change. Changing the jets on a Carter can easily be done with the carb on and no draining of the fuel bowls is required. The secondaries are easy on a Holley, esp if you have the quick change upgrade for the vacuum dia. The AFB carbs have issues with the secondary being a PITA to adjust, the AVS Thunder carbs are easy. Comparing a DP Holley to an AFB/AVS is apples =/= oranges, they were designed for different purposes. Saying a DP Holley is better on the track (drag race) than a vacuum secondary carb of any stripe is really a no-brainer. If there is a significant HP difference then carb is defective, poorly calibrated, or otherwise mismatched.
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Re: why the hatred for the eddy 750 carb
[Re: 451Mopar]
#1577877
02/16/14 04:37 PM
02/16/14 04:37 PM
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Joined: Jan 2003
Posts: 12,028
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,028
Benton, IL.
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Quote:
Quote:
The CarterBrocks are simpler carbs that have far fewer sizes with very few choices. But, when right, they are extremely dependable.
For tuning, Edelbrock has 32 different metering rods, at least 16 different jet sizes, 5 different step-up springs, and at least 3 different accelerator discharge orface sizes. The old Cater strip kit adds another 6 metering rods.
You are confusing tuning parts with carb choices. There are very few CarterBrock choices for a given size of carb when compared to the Holley platform.
That does not necessarily mean that the CarterBrocks are inferior, just that you are more likely to need to tune one rather than find a version closer to your needs OOTB.
But then, most guys don't know how to properly size a carb for their needs, let alone choose the best metering for their application or be able to tune it. So six of one, half dozen of the other.
Master, again and still
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Re: why the hatred for the eddy 750 carb
[Re: Junky]
#1577879
02/16/14 06:00 PM
02/16/14 06:00 PM
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Joined: Mar 2006
Posts: 9,825
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,825
MI, usa
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Granted these Carter/Eddy/Weber carbs are slugs. Dave Dudek, pure stock Super Bee Factory stock 10.92@127Doug Duell "Dragon Wagon" N/SS 9.39@145DVW 64 Belvedere N/SS 9.25@147.7And lets see what have I done to mine? Metering piston spring change, secondary jets up 2 sizes, removed the choke blades. Gee that was hard. For what it's worth Len Adamacks 63 Plymouth N/SS was faster with Eddy's than Holley's. Ya it's a slug also. 8.99 @151. Duell's car now has Holley's still runs the same class, no miracle speed improvement. And yes I also have cars with Holley's. They'll all work . Doug
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577881
02/16/14 06:07 PM
02/16/14 06:07 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Quote:
"480 calculated flywheel hp isn't too shabby considering he is grossly undersized on carburetor CFM, I bet it has wicked throttle response."
You hit the nail on the head. He'd make much more power with a better carb. A 750DP or even better HP would give him much better performace.
Again this is just "wishcasting" assuming he would have better performance with a Holley over a Carter of the same size.
He would have greater performance with a ANY carburetor with more CFM than 750, he is undersized for the application/displacement.
ok keep telling yourself that. A holley 750 DP/HP or even a vacuum would give him more HP. I have 3/4's of a holley 750dp in the garage. If somebody wants to buy the rebuilt kit and 2 fuel bowls, I'll rebuilt it and give it to him. If it doesn't run 2.5 tenths faster in the 1/4 mile I'll buy all parties involed a 30 pack of Bud.
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577889
02/16/14 07:23 PM
02/16/14 07:23 PM
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Joined: Jan 2003
Posts: 74,977
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,977
U.S.S.A.
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Quote:
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The problem is there are more people that think they are sealed units than don't.
Then they are very much in the wrong hobby and are in the vast minority, perhaps its just were you live.
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He had ZERO intention of using that carb , it was just a test to see where it was out of the box.
Wait- Did you not state "he knew his way around a carburetor" and now you are stating something else? huh.
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Did you skip over the part where he swapped on the CARTER 750 , which you state is the SAME CARB, and the engine didn't run like a piece of crap ?
You have reading comprehension issues my friend, I stated they were virtually the same castings. Jetting, metering rods and spring rates make a huge difference.
Quote:
But again ZERO INTENTION of running that carb either. A strip kit is just jets, rods and springs, it does nothing if the carb itself, with incorrect size internal passages, is the problem.
And you know this how? You picked a poor example "as proof" and display a bit of ignorance about how the AFB's are constructed. I have a problem taking your word on the subject as to the shortcoming of this particular carburetors design. On the other hand I own several Edelbrock and Carter AFB's and they all work great and have rebuilt and tuned several hundred over the decades for a living (including Holleys, TQ's and AVS not to mention non-mopar stuff like quadrajets and even the horrible VV carb from Ford!) for other people without issue.
A single example in which the user freely admits making no changes to the unit is not a sweeping indictment on Edelbrock carbs.
I find it amusing that people will spend vast amounts of time on Holley carbs "drilling this circuit" or "swapping out this air bleed" or "trying this modification" but won't spend some time learning how AFB's work which are the simplest of devices.
But that's ok, more for me ;-)
Oh sorry , you are the king of carb tuning , everyone else on the planet is an IDIOT compared to you ..... 
 I'm out , you're
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577890
02/16/14 07:25 PM
02/16/14 07:25 PM
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Joined: Jan 2003
Posts: 12,028
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,028
Benton, IL.
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Quote:
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But Holley and their partners are making more and more carbs with dual patterns. Including the new Speed Demon.
Ahem.
You are aware that both the Carter and Edelbrocks AFB's also have a dual bolt pattern? And have done so for decades?
The new "TQ" from Demon is not a spreadbore carb, its designed for squarebore intakes.
Dual pattern and spreadbore/squarebore are two different things.
Spreadbore carbs never caught on in the market even though they are an excellent idea with small primaries and much larger secondaries. I doubt anyone would tool up to make a new design. You can sell just about anyone a squarebore carb but spreadbore the market is limited and there is plenty of Quadrajets out there.
Still, spreadbores are non existent in CarterBrocks. They are simpler with less choices.
But you're right that they bolt onto both styles of intakes, there is no dispute there.
I am not sure that I would agree that the new Street Demon is not a spreadbore or that it was designed for square bore intakes. Or that spreadbores never caught on. Demon claims it was designed for both, hence the GoogleValve or whatever they are calling it. There is certainly a large difference in the primary and secondary bores.
Tell ya what; if you don't want to call it a spreadbore, why don't we call it a Google bore? And we'll note that it was designed by a former Carter guy.
Any chance that will make you happy?
Master, again and still
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Re: why the hatred for the eddy 750 carb
[Re: Cab_Burge]
#1577891
02/16/14 07:26 PM
02/16/14 07:26 PM
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Joined: Jan 2003
Posts: 74,977
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,977
U.S.S.A.
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Quote:
I think most of you guys commenting on the Eddy 750 forget who Edlbrock sells a majority of the carbs to, it is not Mopar people
WINNER !!!!!
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Re: why the hatred for the eddy 750 carb
[Re: DaveRS23]
#1577892
02/16/14 07:52 PM
02/16/14 07:52 PM
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Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan
I Live Here
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I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
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Quote:
Still, spreadbores are non existent in CarterBrocks. They are simpler with less choices.
Why on earth would they make a product there is virtually no demand for? I mean if thats a plus for Holley then by all means take it.
How many spreadbore carbs does Holley sell every year? 1 in 100? 1 in 1000? I'm betting closer to 1 in 1000 than 1 in 100 considering how many regular flange carburetors they have for sale. I might have handled one or two spreadbores Holleys in my life and both were on RV's.
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I am not sure that I would agree that the new Street Demon is not a spreadbore or that it was designed for square bore intakes
It's clear it isn't a spreadbore carb like the TQ or Quadrajet. They tried to make it like them (very small primary & very large secondary) but were limited on the secondary side due to the width of the squarebore opening, that's why it has more of a blade to maximize the cfm on the secondary side.
Will it fit on a spreadbore intake like the M1 with a large hole?
Sure, so would any AFB or Holley. The secondary blade on the street demon is no wider than a common squarebore intake opening though unlike a TQ or Quadrajet. I can bust out some gaskets for a comparison if you like.
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Any chance that will make you happy?
People trying something new always makes me happy! Innovation is a wonderful thing and its nice to have more options not less in the marketplace.
I give Holley a big thumbs up for bringing it to market.
Now make a 900 cfm model =)
P.S. I have no particular animus against Holley, I like some of their products very much (like I stated already, have three of their carbs on the shelf) and there is features they have which are nice to have (always liked the sight glass for fuel level, external adjustable needle and seat which is also removable for cleaning) but other features are less desirable to me such as puking fuel everywhere during jet changes, popping power valves, gaskets below the fuel line and the air/fuel ratios tending to be on the fat side all the time.
Since in my experience (mirrored in Dwayne's dyno results) there is no real hp difference between a properly tuned Holley and a properly tuned Carter of the same size I prefer the Carter since it has better transitioning between circuits, the fuel is contained in the bowls (no gaskets to leak) and no power valve to blow out.
If I were to install a Holley of the same CFM as the AFB currently on there and picked up an incredible 25 hp (2.5 tenths) I'd leave that sucker on there.
Fair enough? Trying to be diplomatic here, but some of you are asking me to disregard 30 years of carb work under my belt, Dwayne's dyno results and the class racers who have also chimed in. Not going to do it.
"I think its got a hemi"
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Re: why the hatred for the eddy 750 carb
[Re: Mr.Yuck]
#1577899
02/17/14 12:17 AM
02/17/14 12:17 AM
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Joined: Feb 2005
Posts: 222
Onalaska, Wi
sixtyninefuchs
enthusiast
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enthusiast
Joined: Feb 2005
Posts: 222
Onalaska, Wi
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Quote:
"480 calculated flywheel hp isn't too shabby considering he is grossly undersized on carburetor CFM, I bet it has wicked throttle response."
You hit the nail on the head. He'd make much more power with a better carb. A 750DP or even better HP would give him much better performace. Even a thunder 800 would..
I'm glad somebody brought up Thermoquads. I love them, however finding a good one seems hard these days.
FWIW a big 4bbl would probably run better on my car, but I've always wanted a 6-pack, I can't afford a hemi
How about I go through the misery of rebuilding my 4781 AGAIN (and hope it doesn't leak gasoline all over my engine) I hate carbs that leak fuel....float bowls, 50cc accelerator pumps, blowing fuel out the vent tube from the smallest particle in the needle and seat, etc.
And what about the wonderful world of power valves (that can't stand up to todays fuels....although an alcohol power valve would probably work)
No thanks, I like my dirt eating edelbrock (14 years without ANY leaks, failed power valves, or needle and seat issues)
Oh, I forgot to say I have a 440 six pack as well (since 1990) and I love how it performs, just hate the maintanence.
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Re: why the hatred for the eddy 750 carb
[Re: Supercuda]
#1577901
02/17/14 01:50 AM
02/17/14 01:50 AM
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Joined: Aug 2006
Posts: 84
Ontario, CANADA
hemi pwr
member
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member
Joined: Aug 2006
Posts: 84
Ontario, CANADA
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I have 2 600s on my and work great for me
1970 440-6 Cuda
71 duster
1999 Dodge ram diesel dually
1958 plymouth hardtop
1975 Fury 2 door
1970 AAR cuda clone
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Re: why the hatred for the eddy 750 carb
[Re: hemi pwr]
#1577902
02/17/14 04:10 AM
02/17/14 04:10 AM
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Joined: Jan 2003
Posts: 27,421
Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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You know alot of Mopars came with Carter AFB's and AVS's on them and ran great. My opinion is both Holleys and Carters/Eddy carbs will work very good. I will say on my 63 I really like the driveability the 850 Holley DP gives me but I would have no problem running two Carter/Eddy carbs. I hate to say this and I mean no offense by it by most of the time when I see someone that says they hate a certain carb it is usually that they dont know what they are doing and really have no bussiness working on carbs. It helps a ton to understand carbs if you want to work on them. Ron
Last edited by 383man; 02/17/14 04:11 AM.
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Re: why the hatred for the eddy 750 carb
[Re: dannysbee]
#1577907
02/17/14 02:55 PM
02/17/14 02:55 PM
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Joined: Jul 2003
Posts: 4,766
Holland MI Ottawa
2boltmain
master
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master
Joined: Jul 2003
Posts: 4,766
Holland MI Ottawa
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The consensus was and is the Edelbrock Performer 750 had a fault- a fault the Performer 500 and 600 do not have. What lends credibilty to this claim is the fact Edelbrock omitted the 750 cfm size for their Thunder series and chose to develop an 800cfm unit. The Thunder line is offered in 500 600 and 800cfm.
Keep old mopars alive.
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Re: why the hatred for the eddy 750 carb
[Re: 2boltmain]
#1577911
02/17/14 03:15 PM
02/17/14 03:15 PM
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Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan
I Live Here
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I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
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By the way- The two AVS models (650 and 800) flow 50 more cfm than there AFB counterparts. I suspect that this is because the AVS has a totally different secondary booster setup than the AFB, hence flowing 50 more cfm of air.
Which would pretty much shoot your theory out the window. On the primary side, AFB and AVS are the same. I bet Edelbrock just modified the existing 600/750 AFB castings to use the AVS style booster tube and spring door.
"I think its got a hemi"
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Re: why the hatred for the eddy 750 carb
[Re: Supercuda]
#1577912
02/17/14 04:24 PM
02/17/14 04:24 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
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And the comment on air bleeds has been missunderstood. I have never monkied with air bleeds..is that better for you?
Not what you said and not misunderstood.
It becomes more evident the more YOU post that YOU do not know how to tune a carb, therefore the too rich out of the box Holley is perfect, for you.
actually non of them I've set up have run rich, including the three on this car. But carry on w/ your badash carb building self, since I don't know what I'm doing.
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Re: why the hatred for the eddy 750 carb
[Re: mopar65]
#1577913
02/17/14 04:28 PM
02/17/14 04:28 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
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bottom line you can run TWO Carter/Eddys or ONE Holley, I guess the choice is yours. There is NO WAY to get the power of a 750DP/HP carb from one Eddy 750...or 800 Thunder. It's just not going to happen. The Out of the box Edddy 750 is not going to run well on a mild BB, even w/ the strip kit. However an out of the box Holley 750 will w/ a few turns of the screw driver.
The Eddy 750 isn't bad, it's just not meant for all out performance.
Oh you don't say? funny i ran 10.52 at 125 in the 1/4 with a set of box stock edelbrock 750 carbs. all i did was set the idle and take out the choke plate.s. i had them on my 440 powered 65 Plymouth.sorry not trying to bash you in any way.just i think saying they wont work in a performance set up is not right. mopar65
right you needed TWO. Try it with one.
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Re: why the hatred for the eddy 750 carb
[Re: SomeCarGuy]
#1577917
02/18/14 01:54 PM
02/18/14 01:54 PM
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Joined: Jan 2003
Posts: 9,436
Blair County,PA
62maxwgn
master
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master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
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Quote:
Run whatever carb you want to spend the time or dollars on.
That suggestion should have put this subject to bed three pages ago !!
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Re: why the hatred for the eddy 750 carb
[Re: DaveRS23]
#1577919
02/18/14 06:30 PM
02/18/14 06:30 PM
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Quote:
Quote:
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The CarterBrocks are simpler carbs that have far fewer sizes with very few choices. But, when right, they are extremely dependable.
For tuning, Edelbrock has 32 different metering rods, at least 16 different jet sizes, 5 different step-up springs, and at least 3 different accelerator discharge orface sizes. The old Cater strip kit adds another 6 metering rods.
You are confusing tuning parts with carb choices. There are very few CarterBrock choices for a given size of carb when compared to the Holley platform.
That does not necessarily mean that the CarterBrocks are inferior, just that you are more likely to need to tune one rather than find a version closer to your needs OOTB.
But then, most guys don't know how to properly size a carb for their needs, let alone choose the best metering for their application or be able to tune it. So six of one, half dozen of the other.
Sorry, I was thinking of tuning combinations.
I wish the CarterBrocks had different booster options and adjustable bleeds like you can get in the Holley style carbs. Living in Denver (6,000 ft altitude) none of the carbs seem to work well out of the box, and the issue is not getting the main jetting correct, it is the transition circuit between idle and when the mains take over. The Holley race carbs which have richer idle/transition seem to work better than their "street" carbs. Every Holley Avenger carb seems to have a lean idle/transition, but it is pretty easy to enlarge the idle restrictions in the metering block. I haven't tuned a Carter to the same level, but I think the idle air bleeds would have to be reduced in size for a richer transition circuit?
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Re: why the hatred for the eddy 750 carb
[Re: gdonovan]
#1577921
02/18/14 08:19 PM
02/18/14 08:19 PM
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Quote:
Quote:
I haven't tuned a Carter to the same level, but I think the idle air bleeds would have to be reduced in size for a richer transition circuit?
Making the air bleeds smaller will pull the fuel out of the booster faster, easy enough to pull a set screw in the air bleed location and drill to what ever size you want and you can always change it later.
The 750 on my Duster has been tweaked like this on the secondary side, throttle response when the secondaries snap open is extremely crisp. I don't see why you can't do it on the primary side too.
I forgot that the idle bypass jet could be reduced in size too? I never tried these changes to richen up the idle/transition on a Carter, But I may have to play around with my old Carter 750 carb and see how it responds.
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Re: why the hatred for the eddy 750 carb
[Re: RSNOMO]
#1577924
02/24/14 09:56 PM
02/24/14 09:56 PM
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Joined: May 2005
Posts: 784
Florida
cbusters
super stock
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super stock
Joined: May 2005
Posts: 784
Florida
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Quote:
For the Carter tuners...
Too Cool!!
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Re: why the hatred for the eddy 750 carb
[Re: cbusters]
#1577925
02/25/14 09:55 PM
02/25/14 09:55 PM
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Joined: Jan 2004
Posts: 8,236
fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,236
fredericksburg,va
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Quote:
Quote:
For the Carter tuners...
Too Cool!!
I can hear em now, a 600 holly will flow more air and pick up 9 tenths and 200 mph
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Now, a 4150 or 4500 series Holley 
