I just recently bought an 88 Iroc 5.0 TBI and was wondering if anyone had some simple(cheap) ideas to bump up the horsepower a bit. Any ideas will be appreciated.

 

The Zs starting having TPI in 85, you sure you know what you have? The 305 TBI wasnt a Z

 

Nor T-tops with a 350 either .... well, in 91 and 92 anyways

 

1988 LO3 V8 was TBI with 170hp 255lb tq and was avaliable on IROC-Z, Formula and Trans Ams.

(anyone that doesn't believe me refer to this http://www.thirdgen.org/newdesign/tech/techdb.shtml )

My number 1 suggestion would be headers, and a K&N for the air cleaner. A friend of mine has a 89 Trans Am TBI, has the same motor and headers and a high flow down pipe and muffeler really made a big difference.

 

well hmm firts off 700 r4 tranny, shift kit, corvette servo, bigger throttle body, heater core relay bypass, umm take ac off and take off compressor, electric water pump, k&n filter get a different breather, exhaust and headers, new pulleys, clean the throttle body, engine and tranny flush, champion spark plugs, new ignition and wires, tweak here and there, 93 octane!!!

those are all relativelay simple!!!!

 

no such thing as a bigger throttle body for TBI that is TPI your thinking of.

Electric water pumps are like $260, alot of other stuff could be done first for cheap before getting to that so thats like the last thing you would want to add, plus they don't really last long enough for a daily driven street car.

Underdrive pulleys on these cars are nothing but trouble.

No ac in florida? if its daily driven then hell no.

On Third Gens when heat is off the heater control valve is shut and the heater isn't gonna be circulating any fluid, so a heater core relay bypass would be sorta silly. Plus this would be of dubious utility, a 160 degree thermosat would achieve far better results without hurting functionality.

K&N yes, but these cars don't have breaters, they have PCV valves.

 

Thanks for the info. Any recomendations on what kind of headers to buy?

Joe