Gsc Or Hks
Be aware that a big exhaust cam that opens the exhaust valve early will kill spool and bottom end torque on a stock turbo. The engine dynamics on stock style turbo are not conducive to early exhaust valve opening. The loss of cylinder pressure from the power stroke outweighs the reduction in pumping losses. I'm not sure you'd see much of any gain going from an S2 to an S3 on a stock turbo,but you might lose a bunch on the bottom, .
Last edited by evovin; May 8, 2008 at 05:48 PM.
great! i should be on evom, supraforums, gtrforums, and nasiac a bit more now a days... we have pretty much finished up the PIA known as moving and setting up so i have more time to answer peoples questions, and even release some new products! i'm itching to get into our new design room and cook up some new fun cams to go along with our cylinder head! oh and our evo X parts should start rolling out next month!
Martin sent me a graph comparing our S2 to S3 when he was doing his cam test ill see if i can post it
Last edited by GregGSC; May 8, 2008 at 06:13 PM.
