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ProForm HP-style carb body QC issues? #178815
12/30/08 12:11 PM
12/30/08 12:11 PM
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BradH Offline OP
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BradH  Offline OP
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Has anyone encountered any quality control issues w/ the ProForm HP-style carb bodies? I've come across some comments on the 'net where people have said there were misaligned venturis (compared to the baseplate), passages not in the original location, etc., that can cause complications. So, I was wondering if anyone here can attest to this being a common problem or not. FWIW, I'm considering the 950 main body for use w/ a 1.75" billet base plate I already have.

Re: ProForm HP-style carb body QC issues? [Re: BradH] #178816
12/30/08 03:45 PM
12/30/08 03:45 PM
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Ansonia, CT
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CJK440 Offline
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CJK440  Offline
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Ansonia, CT
I bought a 750 body and baseplate and the dowel holes didn't line up.

I ended up omitting the dowels and lining up the venturi bores by eye/touch and socking the screws down.


2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"
Re: ProForm HP-style carb body QC issues? [Re: BradH] #178817
12/30/08 04:15 PM
12/30/08 04:15 PM
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440Jim Offline
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440Jim  Offline
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FYI, Jesse from Biggs Carb posted this info not too long ago, so you can decide what venturi size you want.

Proform carb bodies:
850 cfm 67107C has 1.400 venturi X 1.750 Baseplate
950 cfm 67108C has 1.450 venturi X 1.750 Baseplate
Holley 950 is 1.375 venturi X 1.750 Baseplate

Re: ProForm HP-style carb body QC issues? [Re: BradH] #178818
12/30/08 04:49 PM
12/30/08 04:49 PM
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Central Valley, CA.
Quicksilver440 Offline
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Central Valley, CA.
I used a 750 pro-form body with zero issues.

Re: ProForm HP-style carb body QC issues? [Re: 440Jim] #178819
12/30/08 04:50 PM
12/30/08 04:50 PM
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Richmond Va, KeislerTKO 60...
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VanishPt Offline
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do they both have the same type of boosters?

Re: ProForm HP-style carb body QC issues? [Re: Quicksilver440] #178820
12/30/08 04:58 PM
12/30/08 04:58 PM
Joined: Sep 2004
Posts: 344
Upper Sandusky, Ohio
RoadSkinner Offline
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RoadSkinner  Offline
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Upper Sandusky, Ohio
Ive built a few of these carbs and i havent had alot problems with the PROFORM stuff , But i have with the PROCOMP main bodies , The passages to the base plate are mis alighned and I drill 4 hole that are missing to the metering blocks , The metering holes may not make alot of difference but i make them just like the HOLLEY centers , When u swap the main bodies just compare and make them just as the hollies are , Thats what i do and i havent had any prodlem with doing this .....

Re: ProForm HP-style carb body QC issues? [Re: VanishPt] #178821
12/31/08 10:15 AM
12/31/08 10:15 AM
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Posts: 16,923
NC
440Jim Offline
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440Jim  Offline
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Quote:

do they both have the same type of boosters?


In his post, Jesse said they both used down leg boosters. Call him if you have any questions.

Re: ProForm HP-style carb body QC issues? [Re: 440Jim] #178822
12/31/08 10:35 AM
12/31/08 10:35 AM
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Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
Mr.Yuck  Offline
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Posts: 24,562
Brookeville, Md
I used the Proform 750 mainbody and had zero issues. well worth the $99

Re: ProForm HP-style carb body QC issues? [Re: VanishPt] #178823
12/31/08 11:18 AM
12/31/08 11:18 AM
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BradH Offline OP
Taking time off to work on my car
BradH  Offline OP
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Quote:

do they both have the same type of boosters?



If you check out the close-up pictures on Jeg's web site, you'll see they all have downleg boosters. However, it appears that only the 950 body's boosters have an additional "step" machined into them (visible from the underside view) which improves fuel distribution.

There is also a 1050 main body with even bigger venturi, but (oddly, IMO) it doesn't have the stepped boosters the 950 body shows. I'd think this would be even more important w/ the larger venturi to improve response, etc.







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