whats your exhaust setup like? normally a slow revving engine is from a poorly designed exhaust setup. even the factory truck header is better than the manifold, then they also make aftermarket full length headers which may be a good chice. sticking with about a 2.5" exhaust from headers back will give you probly the best performance for a naturally aspirated 2300. i wouldnt go larger than a 2.5" though, you will lose performance. im running just the 2" and it feels really good. but im setup for good torquey response, so for a lighter car and racing a 2.5" may work just right. you also might want to look into makeing sure the intake manifold is port matched between upper and lower, which intake manifold are you using anyway? there are a few different versions between the cars and trucks and different years.
'94 2.3L, M5OD, BW1354 manual, 4x4, 31x10.5 BFG A/Ts, 15x8 AR Chamber teflon rims, 7.5 4.10 lock-right w/disks, D44 SAS 4.10 aussie-locker, duff traction bars, electric fans, spintech muffler, duff poly body mount bushings, Lightforce RMDL140's, cobra 18wxst II, herculined floor, 375,XXX
'87 camaro 305 carbed (needs engine)
'92 subaru legacy 2.2L Turbo (needs tranny)
TRS Tech Support Staff