4-2-1 Lower To Midrange Power 4-1 Some Midrange Mostly Top End Power

 

well we can prove that on the dyno! lol

 

Yes You Can Post The Dyno Sheets When You Get It Done

 

lol well lets get to it!

 

yeah, the prelude guys get headers with a 2" collecter and do a 2.5 collecter mod, i'd be interested in stock(ITR, lower trims) VS cheap(DC sports, mega...too many to list) aftermarket vs highend IE hytech, RMF and the like

 

ill donate the car/motor. lol now lets get some tests on the dyno! anyone else wanna help?

 

we did one 2-3 years ago between hytech, rmf, smsp, dtr, dcsport lol and one more i cant rmember on 250whp na pump gas bseries 85mm 13:1 gsr

 

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

 

What were the results?

 

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.