ZiggyVanFloggin

Ok I've done several searches on here, but no results. Ok to begin I have an 00 z28. Car ran like a bat out of hell for first 3 months of owning it. I've had it for a year now. And it seems to be getting progressively slower. Iv have done long tube headers, lm1, ory, and slp intake. None of these mods seemed to make any noticeable improvements. Car runs a best of 15.38, with a 60 ft of 2.383. It has 98k miles on it. Trans was rebuilt by aamco 20k miles ago. I has new pushrods, and trunion upgrade. New msd wires and new plugs. Compression test showed 175 to 180 psi on all cylinders. Did fuel pressure test and got 60psi, from idle all the way through wot. Battery and alternator tested good. Car runs smooth no check engine lights, just way underpowered. Any suggestions on what to test next?

SSZ

Do you have catalytic converters on it? If so, likely beginning to plug.

LLLosingit

iTrader: (4)

Who tuned it after the mods?...... You did have it tuned right?

N20zuki

This ^^^^