2002ws-6

iTrader: (5)

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?

bboyferal

iTrader: (9)

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.

2002ws-6

iTrader: (5)

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.

bboyferal

iTrader: (9)

Keep street tires on, and you should be fine for a bit.

99Z28LS1

iTrader: (4)

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