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Carburetors Carb discussion and questions. Upgrading your Third Gen's carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

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Old 06-22-2008, 05:53 PM   #1
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Car: 82,83,99 Trans Am
Engine: 350,'75 350,346
Transmission: M4,'86 700r4,4l60e
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Secondaries - Carb problem?

Sup,
Is there a way of knowing if your secondaries are opening?

Both of the T/As have 350s in them, but with rebuilt stock qjets. The vacuum system is all a mess on both cars (shop did it, wasn't my choice). They both run, but I'm not sure I'm getting the proper performance out of them. (tied a stock Subaru Forester H4 with 5spd manual with the 700r4 83' from 0-60, yeah thats pretty bad)

Any ideas?
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Old 06-22-2008, 08:43 PM   #2
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Join Date: Jun 2008
Location: Clinton,Il
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Car: 1986 Z28
Engine: 305 4bbl
Transmission: 700R4
Axle/Gears: stock i think 2.73

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Re: Secondaries - Carb problem?

im in the same boat with you man 0-60 in like 9 sec. on a 350 thats terrible. I would also love to know the answer.
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Old 06-22-2008, 11:14 PM   #3
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Car: 1983 Pontiac Firebird
Engine: LG4 305ci 4bbl
Transmission: 700r4
Axle/Gears: 10-bolt open diff.

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Re: Secondaries - Carb problem?

you can adjust the secondaries to open up sooner. i just did it the other day, and it's really easy. it's the first section in the link called setting air valve (AV) tension. i actually noticed a difference afterwards.

http://www.thirdgen.org/quadrajet
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Old 06-22-2008, 11:14 PM
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