91 Formula 350, accel tpi base, as&m runners, lingenfelter ported plenum, holley 58mm TB, jet eprom. Anyone make a suggestion as to fuel pressure with the 30lb injectors, car is running rich and I am considering putting the 22lb stock injectors back in or getting 24lb injectors, any thoughts?

thanks,

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Pete R.
1989 GTA ZZ3 350 With Superram, ATI procharger with 12PSI and updated with 92 GTA styling....too much more to list
1991 Firebird Formula 350 and Dealer installed SLP Performance Package with 19,500 miles original. Keeping it mostly stock

 

Probably either need a custom chip or you will have to put the stockers or some Accel #23-#24 in. You'll never get the fuel pressure low enough for such a near stock car to run right with those big injectors.

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1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, MSD coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley AFPR, ported plenum,
Ported Daytona Yellow stock base, Moroso valve covers, other stuff,
Ruger P95DC, hot wife, new oil filter, thick rubber floormats, no cats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."

 

I agree with the above, either a custom chip or smaller injectors are what you need, you would have to lower the fuel pressure to 24psi for the fuel flow to be correct for what the chip is programmed for, and the injectors wont work real well if at all at that pressure. 30's look like overkill for that setup anyway.

 

Def a overkill! Go for stock injectors. Look at my sign. and I have stock injectors but then I have a custom chip and higher fuel pressure.

/N.

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GTA -89:383, 4-bolt,Free flow muffler,dual 3" HF cats, Edelbrock headers, Canfield heads, 1.52 RR 7/16, ZZ-9 cam, Big Mouth, AS&M LTR, !plenum, 52 TB, MSD 6AL, TPIS level V prom, Superior shift-kit and all the minor mods,looking for a SR ...
http://www.itv.se/tacs/members_cars/m279/m279.html (Swedish Trans Am Club)

 

Before you go through the pain in the *** of changing injectors, DEFINATLY check into prom burning at the DIY PROM board. Its a little overwhelming at first but its not to hard to do it yourself once you get the hang of it.

Brendan

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1987 IROC-Z L98,SR,EB 6085's,LPE 219/219 SR Cam, Crane 1.6RR, EB TPI Base, 58mm TB, Stock T5, 30lb SVO, AFPR, K&N, EB TES, Catco Cat, 3" Borla Cat-Back, Accel cap,rotor,distro/other crap, Aluminum DS, 94 Disk Rear, Adjustable Prop Valve, Precision 3.73 Gears, Weld in Sub-Frame Connectors, Hotchkis LCA's, KYB Shocks/Struts, Poly Bushings all over the place, Moog Upper/Lower Ball joints and Tie Rods ends/Idler Arm, Big stereo, 730SD Conversion.

To see the ROC, Check out the webpage Here