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Re: I put a Demon 750 on my stumbling 440 last night.
[Re: 74RALLYE]
#1650371
07/24/14 10:54 AM
07/24/14 10:54 AM
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Joined: Jan 2003
Posts: 12,160
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,160
Benton, IL.
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You basically went from one of the worst calibrated carbs out there to one of the best. Congratulations! 
Master, again and still
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Re: I put a Demon 750 on my stumbling 440 last night.
[Re: 74RALLYE]
#1650373
07/24/14 11:16 AM
07/24/14 11:16 AM
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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:
Still there's a couple of wise asses that claim the Edelbrock dead spot on a 440 is all due to the owner's lack of tuning ability. If you have to back the timing way down to band aid it, what have you really fixed?
or the ones who say bla bla I run 10's with mine, but forget to mention they need TWO to do it.  I'd rather have a 30+ y/o DP than a brand new 750Eddy.
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Re: I put a Demon 750 on my stumbling 440 last night.
[Re: Mr.Yuck]
#1650374
07/25/14 11:10 AM
07/25/14 11:10 AM
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Joined: Dec 2004
Posts: 915
S.W. PA
6PACMAC
super stock
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super stock
Joined: Dec 2004
Posts: 915
S.W. PA
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Quote:
Quote:
Still there's a couple of wise asses that claim the Edelbrock dead spot on a 440 is all due to the owner's lack of tuning ability. If you have to back the timing way down to band aid it, what have you really fixed?
or the ones who say bla bla I run 10's with mine, but forget to mention they need TWO to do it. I'd rather have a 30+ y/o DP than a brand new 750Eddy.
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Re: I put a Demon 750 on my stumbling 440 last night.
[Re: CokeBottleKid]
#1650375
07/25/14 11:36 AM
07/25/14 11:36 AM
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Joined: Dec 2007
Posts: 18,157
Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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Quote:
And now you know one of the reasons I don't use edelbrocks...
Totally agree...unless you rework the entire carb inside/out, the Eddys are POS
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Re: I put a Demon 750 on my stumbling 440 last night.
[Re: DAYCLONA]
#1650376
07/25/14 12:37 PM
07/25/14 12:37 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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well I have been running a eddy 600 or a 750 for the last 20 yrs. results did vary depending on the engine combo. all street duty daily drivers. this past weekend I put a 20yr old 6210 spredbore mech double pumper/holley street dominator on. 2x 85 stepside 91 JY 318/whiplash roller cam/NV4500 5 speed/3.55sg 4000# daily driver. WOWZERS! that thing woke up and made a big improvement in the lowend torque/drivabilty and flat out kicks in when going WOT. feels stronger/smoother/ and picked up a couple MPG think I will get a 3310 750cfm mech double pumper for the 88-440 truck and remove the edelbroke. I don't recall WHY I went to edelbroke in the first place other than it was free??  I always thought holleys were nothing more than gas holes with poor mpg but I am seeing the light 20yrs later. 
Last edited by scratchnfotraction; 07/25/14 12:40 PM.
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Re: I put a Demon 750 on my stumbling 440 last night.
[Re: scratchnfotraction]
#1650377
07/25/14 02:51 PM
07/25/14 02:51 PM
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Joined: Oct 2005
Posts: 4,954
WI
Dcuda69
master
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master
Joined: Oct 2005
Posts: 4,954
WI
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Quote:
well I have been running a eddy 600 or a 750 for the last 20 yrs. results did vary depending on the engine combo. all street duty daily drivers.
this past weekend I put a 20yr old 6210 spredbore mech double pumper/holley street dominator on.
2x 85 stepside 91 JY 318/whiplash roller cam/NV4500 5 speed/3.55sg 4000# daily driver.
WOWZERS! that thing woke up and made a big improvement in the lowend torque/drivabilty and flat out kicks in when going WOT.
feels stronger/smoother/ and picked up a couple MPG
think I will get a 3310 750cfm mech double pumper for the 88-440 truck and remove the edelbroke.
I don't recall WHY I went to edelbroke in the first place other than it was free??
I always thought holleys were nothing more than gas holes with poor mpg but I am seeing the light 20yrs later.
A 3310 is a vac secondary carb. Regardless, a very good street carb on a big block   Oh and I agree with all the comments on the Edelbrocks...I've fought with a couple...then bolt on a Holley and DONE!!
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Re: I put a Demon 750 on my stumbling 440 last night.
[Re: KillerBee]
#1650379
07/25/14 03:05 PM
07/25/14 03:05 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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Let's not get into the usual carb wars.
The important thing about this post is that the Street Demon 750 bolted on and worked RIGHT OUT OF THE BOX!
I want one.
R.
Last edited by dogdays; 07/25/14 03:12 PM.
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Re: I put a Demon 750 on my stumbling 440 last night.
[Re: 6PACMAC]
#1650383
07/26/14 01:19 AM
07/26/14 01:19 AM
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Joined: Feb 2003
Posts: 2,810
Sobieski Wi
bee1971
master
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master
Joined: Feb 2003
Posts: 2,810
Sobieski Wi
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Quote:
Back in the day, I had a new Carter 750 Comp series AFB on my stock port 906 headed 67' GTX running 12.2-3s in the summer heat at the strip and idling like crap. My buddy brought along a untouched Holley 850dp, which we swapped on to the GTX. For the rest of the day the car ran 11.80s and would idle without dying like the Carter would.
Kind Of An Unfair Comparison , Wouldn't You Say
And The Carter Comp 750 Is 100 Times Better Then The Edelbrock 750 Series , And Most Will Say They Are The Same Carbs , Wrong Answer
I Think Most Know How Much I Love The Edelbrock 750 Series COUGH COUGH
However , Honestly The Edelbrock 800 Series AVS Are Pretty Damn Nice Carbs , And Work Well
Click On Link (Moparts Archives) And Look At The Dyno Numbers Comparing The Edelbrock 750 Along Side The Carter 750 Comp And Others
Then Read What He Has To Say About The Edelbrock 750 - Same Things I Have Been Preaching On This Website For Years , And At Times Getting Ripped For It
http://www.moparts.org/Tech/Archive/bb/25.html
1971 Dodge Charger Superbee
2011 Ram Sport 1500 Quad Cab Deep Water Blue Loaded
Siberian Huskies
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Re: I put a Demon 750 on my stumbling 440 last night.
[Re: 6PACMAC]
#1650385
07/26/14 12:18 PM
07/26/14 12:18 PM
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Joined: Jul 2003
Posts: 4,779
Holland MI Ottawa
2boltmain
master
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master
Joined: Jul 2003
Posts: 4,779
Holland MI Ottawa
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Its fascinating to hear about the Edelbrock 750 performer. Its an observation voiced by many- not just the mopar crowd. I realize the powers that be at Edelbrock just ignore the shortcomings but I wonder if they at least acknowledge their 750 could use a revision to make it as good as it can be- as good as the Carter 750 from which it is based. Im impressed that someone at Demon recognized the worth of the old Thermoquad and had the guts to bring an improved version of it to the market.
Keep old mopars alive.
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Re: I put a Demon 750 on my stumbling 440 last night.
[Re: 74RALLYE]
#1650386
07/26/14 08:21 PM
07/26/14 08:21 PM
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Joined: Jan 2003
Posts: 942
Virginia, US
RTDaddy
super street
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super street
Joined: Jan 2003
Posts: 942
Virginia, US
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Quote:
I've got a 440 with low idle vacuum that's always had Edelbrock carbs and an off idle stumble. I just converted it to a 4sp and the stumble made it a real POS to drive. When I had the auto trans I spent many days tuning on the Edelbrock 750 and 800 carbs without getting the stumble completely out. Backing the timing down made the biggest improvement in the stumble, but that also cost a bit of power.
I put a Street Demon 750 on last night and the stumble was gone! I can come out on the clutch at low rpm and pull off with no problems. It's incredible how much better the car is to drive now. I set the carb up with the weakest springs from the set and put the pump shot to max, bolted it on and it was like magic.
So NOW do we want to talk about how long ago I told you to get a Holley? 
"IF YOU'RE UNDER CONTROL, YOU AIN'T GOING FAST ENOUGH."
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Re: I put a Demon 750 on my stumbling 440 last night.
[Re: DaveRS23]
#1650387
08/04/14 07:39 PM
08/04/14 07:39 PM
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Joined: Jan 2003
Posts: 1,100
Fort Lauderdale
Dave440
super stock
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super stock
Joined: Jan 2003
Posts: 1,100
Fort Lauderdale
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Hmmm...I'll assume you're referring to the eddy AFBs as being poorly calibrated slugs and not the AVS Thunder series. I tried to tune the stumble out of a borrowed Carter AFB comp (same as the eddy) and never got it right. Gave that thing back. Now I have an original AVS 750 and aside from needing a rebuild kit due to age...it still runs great. The eddy Thunder AVS carbs should be identical to the original with just a few improvements and more CFM (800). So to be clear...you're talking about the AFB eddys as being junk and not the Thunder series carbs right?? Cuz I was thinking about getting one.
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Re: I put a Demon 750 on my stumbling 440 last night.
[Re: Dave440]
#1650388
08/04/14 09:53 PM
08/04/14 09:53 PM
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Joined: Jan 2003
Posts: 12,160
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,160
Benton, IL.
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I liked the old AVSs. We have all won a lot of races with them. But they were replaced with the ThermoQuads 40+ years ago. And for good reason. The newer CarterBrocks range from poor to fair in their current configurations. But none of them have the combination of features that the new Street Demons have. Features that have been proven to have real benefits on our engines. Often in Carter carbs. Plus the Street Demons are calibrated much, much better. It is a former Carter engineer who has played a major role in the development of the new Street Demon. So Carter or Edelbrock could have incorporated these same improvements to their carbs. But they have not. And until they do, there are better choices out there. Right now, when you objectively compare the features and OOTB calibration of the carbs on the market today, the new Street Demon is THE carb of choice for most of our street cars.
Master, again and still
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