Originally Posted by
BERT-O
What is ur setup*? People tend to not know that alot of these well known headers are design for different types of all-motor. Also, as much I stress about it, exhaust size & gearing is a factor as well.
*piston, comp., balance?, head, intake mani, intake and tuning type, etc, etc, etc
heres the setup as of now.
ls vtec. ls rods (shot peened, polished, resized, new bearings), usdm itr pistons, stock gsr head (11.0:1 compression). skunk 2 intake manifold. oem gsr throttle body (subject to change), 3" intake with a k&n filter (ram air from bumper to filter n a home made heat shield too), 2.5" header back exhaust (exhaust shop special) *heres the bad part* 4-2-1 airmass (holly) header that came off my old ls motor setup (1.5 " primaries with collector cut off so that the end was 2.5"). running on a chipped po6 converted to vtec. the basemap is a lil rich, but i did i wanted it that way so it didnt ever get too lean n blow up my new motor. exedy clutch, gsr flywheel, usdm b16 tranny. this is all in a 94 del sol si.
the header/exhaust is probably what is robbing me of power (mostly the header). i wouldnt mind testing it on a dyno to be sure, but im almost posaitive those primarys are too small for vtec.