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Old 10-30-2008, 11:14 AM   #1
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Dual Quad set up

I have a couple of questions here. Sorry if the post gets long. I bought a low milage (<4000) rebuilt 440. It was built to 1970 six pack specs and when I looked at it (before buying), it had a six pack on it. I bought it without intake/carbs. I'm running 4 bbl now but was thinking of going with dual quad (Edelbrock ch-28 and 2 600cfm). Would this be an OK set-up for the motor, not looking for max power/mpg but decent street manners and that "WOW" when hood is opened. I am planning on new heads in near future also. Second question is, am I correct in assuming that Carter AFB Competition carb is the same as Edelbrock performer?? I know they are similar but if I rebuilt both to same internals could I run one of each on this set up? I ask because I have an almost new carter sitting on shelf and was going to pick up a second one. But if I could run one of each it would open my options for picking up used carb. Or would I be better off with two of same brand? Thanks.
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Old 10-30-2008, 12:12 PM   #2
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What heads are you planning on going with? cast, iron, alum? You can run a dual quad setup with a motor that is built for 3 dual carbs, but a little larger cam would really help out.

As far as the Carter and Edelbrock carbs go, Edelbrock is basically a Carter. take the labels off and you can't really tell them apart. As far as the Carter comp and Edelbrock performer being the same, that I do not know. I would imagine them being very close especially if they are the same CFM. I could be wrong though.
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Old 10-30-2008, 01:43 PM   #3
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what kind of cam do you have?
make sure you cam needs it before you give it 1200 cfm's.
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Old 10-30-2008, 01:46 PM   #4
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Dual quad set up

I was thinking alum. Edelbrock or Mopar. If there are others out there I should look at I am open for suggestions.
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Old 10-30-2008, 01:49 PM   #5
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Dual quad set up

I am the third owner of this motor and not sure of cam but believe it to be Mopar Performance P4529270. I have been meaning to get the builders number but have not yet. I was given about all the other specs.
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Old 10-30-2008, 05:03 PM   #6
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also, whats your compression?
if you want the set up to work good, you have to make sure your engine will need it
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Old 10-30-2008, 05:42 PM   #7
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Well that Cam will work with that intake.
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Old 01-13-2009, 01:13 PM   #8
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I ran the same intake on my 70 superbee a few years ago with two 500 cfm Edelbrock carbs, my 440 was .040 over(9.2 to 1) with a repo 375 hp cam, headers & electronic ignition,everything else was stock. (the intake comes with the correct carb jets in a little bag) the car went from running 13.60s @ 103 mph to running 13.10s @ 107 , with NO other changes,NO BS! No flat spots, no hesitation, Pure *****! This manifold is the best kept secret of the Big block Mopar world. I'm building another 440 now for my Cordoba, with more compression & cam,Edelbrock heads,etc. and the identical intake with two 600 cfm.Edelbrock carbs.
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Old 09-29-2012, 09:05 AM   #9
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there is no reason that this would not work great , the Carter / Eddy carbs are very similar although jetting & metering rods may be slightly different , you will not be over carbed as you only have approx 500 cfm forced open with the throttle , the secondary air doors will limit air flow until needed above that . Look at the 440 Source Stealth heads or super stealth , more bang for the $ , I would change the valve spring retainers to 10* & have the clearances checked at a machine shop , they are lower price but with about the same airflow as the eddy heads
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Old 09-30-2012, 08:19 AM   #10
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OK let's start from the beginning.You sad these the engine was built to 440-6 spec's.I assume he drove it with the six pack on it before it was sold to you.Two 600 carbs is 1200cfm.A six pack is middle carb 500the two outer curbs are 350 each.This should answer your question about the dual quad setup.Tuning would be needed.For carbs I would use the same ones.Tuning would be easyer. For heads it would be your your choice.If your not going for a full out race car or a very potent street car Any head will do.Cost would be the only factor. Mark
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what kind of cam do you have?
make sure you cam needs it before you give it 1200 cfm's.
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Old 10-01-2012, 06:05 PM   #11
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you are not comparing apple to apples though ... 2 bbls are rated cfm @ 3 " of vacuum , 4 bbls are rated at 1.5" so a 500 CFM 2bbl flows a lot less than a 500 cfm 4 bbl ,still the 6 pack is around 950 CFM rated as a 4 bbl

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