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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
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	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.

Re: why the hatred for the eddy 750 carb [Re: Mr.Yuck] #1577903 02/17/14 04:28 AM 02/17/14 04:28 AM
Joined: Jan 2004 Posts: 3,837 Central Missouri Fort Leonard... mopar65 master
mopar65 master Joined: Jan 2004 Posts: 3,837 Central Missouri Fort Leonard...	Quote: 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 3520 pound race ready 1973 Street/Strip Dodge Dart - Stock stroke 440/727 10.49 @ 125.0 on 93 pump gas & ET Street Radials. More to come... ( SGT Miller) Proudly served 12 years in the US ARMY RESERVES support our troops

Re: why the hatred for the eddy 750 carb [Re: GTX MATT] #1577904 02/17/14 08:52 AM 02/17/14 08:52 AM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	Quote: Quote: popping power valves, Most Holley's have blow out proof protection now The new ones, how many old ones without are still floating around? A lot, Holley did not introduce the protection until the early 90's I think. "I think its got a hemi"

Re: why the hatred for the eddy 750 carb [Re: gdonovan] #1577905 02/17/14 11:23 AM 02/17/14 11:23 AM
Joined: Jan 2003 Posts: 9,436 Blair County,PA 62maxwgn master
62maxwgn master Joined: Jan 2003 Posts: 9,436 Blair County,PA	And direct from Holley ! 8042777-PA260598.JPG (171 downloads)

Re: why the hatred for the eddy 750 carb [Re: gdonovan] #1577906 02/17/14 12:43 PM 02/17/14 12:43 PM
Joined: Nov 2003 Posts: 5,160 Texas dannysbee master
dannysbee master Joined: Nov 2003 Posts: 5,160 Texas	A good friend of mine had a street belvedere he built on a budget. It was a stock 440 shortblock with ported 915 heads a tm7 a mild comp solid cam and 1 7/8 super comp hookers. He had a 440 Avs on the shelf so he used it. Car was a stock all steel belvedere street car and would run 7.50 at the track. Nothing fancy but a well sorted street car. People at the track would see the avs and say what kind of carb is that. Next thing out of their mouth would be I bet if you had a Holley it would pick it up at least a tenth. Long story short my friend tried it and bought a brand new 750 dp. After much tuning he finally matched et but never did get the Holley to 60' as good as the avs. His take was the Holley was a bit better on top end but throttle response and mid range performance along with mileage was better with the avs. He sold the Holley and kept the avs. My friend is a above average with his tuning abilities and I believe this is a good comparison of the two carbs. Getting old just means you were smarter than some and luckier than others.

Re: why the hatred for the eddy 750 carb [Re: dannysbee] #1577907 02/17/14 02:55 PM 02/17/14 02:55 PM
Joined: Jul 2003 Posts: 4,769 Holland MI Ottawa 2 2boltmain master
2boltmain master 2 Joined: Jul 2003 Posts: 4,769 Holland MI Ottawa	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.

Re: why the hatred for the eddy 750 carb [Re: 2boltmain] #1577908 02/17/14 03:02 PM 02/17/14 03:02 PM
Joined: Feb 2012 Posts: 4,453 Morristown Tn. 7 71birdJ68 master
71birdJ68 master 7 Joined: Feb 2012 Posts: 4,453 Morristown Tn.	I have two 650 Thunders on my Hemi, what about them?

Re: why the hatred for the eddy 750 carb [Re: 2boltmain] #1577909 02/17/14 03:07 PM 02/17/14 03:07 PM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	Quote: The consensus was and is the Edelbrock Performer 750 had a fault- a fault the Performer 500 and 600 do not have. Who is this consensus you speak of? A number of people have chimed in that they are not having any issues at all. If you are "slap on and go" type of guy that doesn't jet properly for the application then yes you might have a problem on a Mopar. This has already been beat to death. Quote: 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. Lot of speculation there bro, I could just as easily state that Edelbrock just went to an 800 CFM AVS style carb since there was a demand for a higher flowing unit then an 750. 50 cfm isn't much, a TQ will pickup that up taking the choke tower off. 800 CFM might be all Edelbrock can squeeze out of the existing casting size without a major retooling. "I think its got a hemi"

Re: why the hatred for the eddy 750 carb [Re: 71birdJ68] #1577910 02/17/14 03:09 PM 02/17/14 03:09 PM
Joined: Jul 2003 Posts: 4,769 Holland MI Ottawa 2 2boltmain master
2boltmain master 2 Joined: Jul 2003 Posts: 4,769 Holland MI Ottawa	Quote: I have two 650 Thunders on my Hemi, what about them? I stand corrected. I didn't know the Thunders were 650cfm. Keep old mopars alive.

Re: why the hatred for the eddy 750 carb [Re: 2boltmain] #1577911 02/17/14 03:15 PM 02/17/14 03:15 PM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	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"

Re: why the hatred for the eddy 750 carb [Re: Supercuda] #1577912 02/17/14 04:24 PM 02/17/14 04:24 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: Quote: 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.

Re: why the hatred for the eddy 750 carb [Re: mopar65] #1577913 02/17/14 04:28 PM 02/17/14 04:28 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: Quote: 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.

Re: why the hatred for the eddy 750 carb [Re: gdonovan] #1577914 02/17/14 04:56 PM 02/17/14 04:56 PM
Joined: Feb 2003 Posts: 10,210 Someplace you aren't S SomeCarGuy I Live Here
SomeCarGuy I Live Here S Joined: Feb 2003 Posts: 10,210 Someplace you aren't	Quote: Quote: 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 think you are confusing the issue- No one is saying its required, what was stated was it is the best way for any carb. Spent several weeks trying to get a Holley working respectable on my GTX, I hated every minute of it. Holley's idea of good drivability is or was YOU WILL RUN RICH ALL THE TIME and with an O2 gauge staring me in the face painfully obvious. 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. I think it is pretty clear that people are needing to rely on one to get the 750 to work right, compared to most of us being able to get carbs to be reasonably close without a gauge. That should speak volumes about where the 750 Eddy stands against other carbs, even other Eddy variants. I want my fair share

Re: why the hatred for the eddy 750 carb [Re: SomeCarGuy] #1577915 02/17/14 06:05 PM 02/17/14 06:05 PM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	Quote: I think it is pretty clear that people are needing to rely on one to get the 750 to work right, compared to most of us being able to get carbs to be reasonably close without a gauge. I myself use a gauge because I like to be precise, not guess at how the car is running or by some crude method like "looking at plugs" Why leave good tools in the toolbox? Chrysler trained me to use O2 sensor readings when diagnosing problems with EFI (even before that with those damn feedback Holley 2bbls on 2.2 engines), why should I throw that most excellent tool away when working on carburetors? If you had a gauge staring you in the face... you can't miss the poor fuel control of some carburetors. Having information is good, better than being ignorant. "I think its got a hemi"

Re: why the hatred for the eddy 750 carb [Re: gdonovan] #1577916 02/18/14 01:23 PM 02/18/14 01:23 PM
Joined: Feb 2003 Posts: 10,210 Someplace you aren't S SomeCarGuy I Live Here
SomeCarGuy I Live Here S Joined: Feb 2003 Posts: 10,210 Someplace you aren't	Who are you talking to, must be yourself. Or some strawman. Who said anything about a gauge being a bad idea? I said if you need to turn to a tool when you otherwise would not, you look at the variables that cause that. The 750 Eddy carb is what changes in the equation. That's a simple concept that you are missing, so stop with the other talk to make yourself feel good about your use of tools. Run whatever carb you want to spend the time or dollars on. I will be running just about anything else than a 750 Eddy and not worrying what you or anybody else are doing, beyond giving an opinion on the subject when it comes up here.

Re: why the hatred for the eddy 750 carb [Re: SomeCarGuy] #1577917 02/18/14 01:54 PM 02/18/14 01:54 PM
Joined: Jan 2003 Posts: 9,436 Blair County,PA 62maxwgn master
62maxwgn master Joined: Jan 2003 Posts: 9,436 Blair County,PA	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 !!

Re: why the hatred for the eddy 750 carb [Re: SomeCarGuy] #1577918 02/18/14 03:44 PM 02/18/14 03:44 PM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	Quote: Who said anything about a gauge being a bad idea? You implied that is a gauge was required to tune a 750, hence what I stated. "I think it is pretty clear that people are needing to rely on one to get the 750 to work right, compared to most of us being able to get carbs to be reasonably close without a gauge. " Feel free to use any tool you like in carb tuning, an O2 gauge isn't required to tune an Edelbrock 750. I'd simply start with the same springs/jets/rods as a Carter 750. Quote: The 750 Eddy carb is what changes in the equation. And Holley's don't suffer from poor jetting out the box? There is an ongoing thread this moment concerning an OOTB Holley and the noted issues with it. You Holley guys are mighty selective in your criticism. "I think its got a hemi"

Re: why the hatred for the eddy 750 carb [Re: DaveRS23] #1577919 02/18/14 06:30 PM 02/18/14 06:30 PM
Joined: May 2008 Posts: 5,399 Aurora, Colorado 451Mopar master
451Mopar master Joined: May 2008 Posts: 5,399 Aurora, Colorado	Quote: 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. 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?

Re: why the hatred for the eddy 750 carb [Re: 451Mopar] #1577920 02/18/14 07:01 PM 02/18/14 07:01 PM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	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 think its got a hemi"

Re: why the hatred for the eddy 750 carb [Re: gdonovan] #1577921 02/18/14 08:19 PM 02/18/14 08:19 PM
Joined: May 2008 Posts: 5,399 Aurora, Colorado 451Mopar master
451Mopar master Joined: May 2008 Posts: 5,399 Aurora, Colorado	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. 8044717-Carter750Booster.jpg (376 downloads)

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