Need Tuning Help
Thread Starter
Senior Member
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Joined: Oct 2008
Posts: 321
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From: New Milford CT
Car: 1991 Trans Am
Engine: 305tbi to 350 carb'd
Transmission: 700r4
Axle/Gears: Stock
Need Tuning Help
i have a holley 4 barrel carb List # 9834 1156. im putting in a 350 with a comp cam 256h .447/.454, double roller timing chain, headers full exhaust, edelbrock performer rpm intake manifold im just wondering if anyone could help me out with setting if i screw the screws all the way in on each side how many turns should i do on each screw(turn to left) for this set up to run fine? any help would be appreciated 
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Typical is to start 1/2 to 1 turn out, then adjust them evenly for max manifold vacuum at idle in drive.
Thread Starter
Senior Member
iTrader: (-1)
Joined: Oct 2008
Posts: 321
Likes: 0
From: New Milford CT
Car: 1991 Trans Am
Engine: 305tbi to 350 carb'd
Transmission: 700r4
Axle/Gears: Stock
Re: Need Tuning Help
ok thanks so do both screws at the same 1/2 to 1 turn out and then put the car in drive put the brake up then work with that also? thanks for you help
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Yes, have both screws at the same position within 1/8 turn, both to start and during adjustments.
