I have a 1987 IROC-Z with a 350 TPI how are the best ways to add HP. Thanks

Headers, aftermarket heads/cam/intake,custom made eprom, and if you still have any money left then get NOS. That combo should get you into into low 12's.

Low 12s?? I'm doing something wrong.. hehe

Yeah, what he said! Welcome to Thirdgen.

-- Joe

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1989 Formula 350 4-bolt mains, Forged .030 TRW pistons, SLP 51010 Roller Cam, Comp-cams roller lifters,
Summit 1.5 roller rockers, World Products Sportsman II 2.02/1.60 heads, Edelbrock TPI Intake,
Cloyes Double Roller, timing chain, Mellings oil pump: 13.5 @ 100.23 MPH

Since close of track : Ported SLP runners, Ported Plenum, AFPR, Autometer 100lbs gauge, A/F ratio gauge.

http://www.joesperformance.com

If you don't have one already, a catback would be my first suggestion. My car had the original exhaust when I bought it and it really woke my car up.

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'87GTA w/ SLP Cold Air, MSD Coil, Airfoil, Gutted MAF, AFPR, TES Headers, HI-FLOW CAT, Flowmaster Catback, Energy Suspension Master Bushing Kit

Thanks should I do anyhting to the suspension

Read the tec articles on the main page there is some good stuff on there for our cars including power, suspention, and other mods for our cars.

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89 GTA w/700r4w/stage 2 shift kit,2800 converter, corvette servo, B&M mega shifter, TPIS bigmouth intake, TPIS large tube runners, TPIS 52mm throttle body, Ported Edelbrock centerbolt heads,Accell 30# injectors,holly afpr,GMPP LT4 hotcam,CompCams Pro magnum roller rockers,Edelbrock headers, flowmaster crossflow muffler,MSD 6A, accell coil,150 shot NOS. The new engine is in but I am still having some small problems.