need custom prom?
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Junior Member
Joined: Mar 2011
Posts: 70
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From: Marathon, Ontario Canada
Car: 1984 Cadillac Brougham
Engine: 1989 Iroc Z 350
Transmission: 700R4
need custom prom?
Just installed vortec heads, performance plus cyclone intake, tbi adapter and throttle body spacer to my 350 tbi. Engine has a mild cam in it, and headers with dual 2 1/2 pipes. Engine runs great around 6 degrees, but can't get rid of a power loss when I slam the gas down. It falls on its face and backfires through the intake. If I don't slam it down and just moderately go to WOT it keeps up but just doesn't seem to have as much power as it should have. I bumped up the regulator to 15 psi also. Wondering if I have to put 454 injectors in it, or if I should get a custom burn prom for it? If I go prom, how can I tell what my cam specs are without a cam wheel? Any good sites for a custom prom? thanks in advance!
Joined: Apr 2005
Posts: 7,736
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: need custom prom?
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