Going +1 on STS
Going +1 on STS Ive got an 02 ws6 bone stock except sts t61, intercooled with 42lbs svo, and racetronixs pump. I'm runing 5 psi with a crane powermax tune. I've never felt good about the crane tune, but now I want to upgrade to MP t-70 with an 81. a/r and 02- zo6 cam, with 918's tit retainers and pushrods. Trying to keep it Ca. legal(ish). Any body run a similar set up on a stock motor? and what #'s where you making? Is 8 psi about the max to run safely? Right now my A/f Ratio is about 11;1 will the 42's max out at 8 psi?
I'm pretty sure your 42's will be fine at 8 psi. Sounds like you got the right idea with the size A/R for the rear mount and all. You've already got pump, and with the 918's valve float for 8 psi should not occur. In the hands of a reputable tuner, 8 psi should last you a while with the stock bottom end. That cam should also help spread the power in the right place a little bit. Currently, I am also bone-stock on 8# of turbo boost...
Keep in mind, though, that 8 psi begins making the stock drivetrain something of a concern... At least the clutch.
Keep in mind, though, that 8 psi begins making the stock drivetrain something of a concern... At least the clutch.
thanks for the info, I have already gone to the z06 clutch, do you think that will hold, or do I need a stonger one. I also got a lot of people recomending 12secSS for the tune. I've read alot of his posts and he really knows what he's doing. Even fixing others bad tunes.
im almost the same set up. the only engine mod i have is an ARP crank pulley.... the rest in the sig. my set up is on 7.5 psi all day long. im sure 8 psi would be no problem. my AFR is on 11.9. with the LSX 78mm intake and granatelli MAF it made 472/501 with 7.5psi
