This is an SMS I got from a guy I did an precision ss1 turbo for:
Hi, I've finally got around to fitting the turbosmart bleed and I also replaced the bov with a turbosmart plumback. The car is driving great and has even less lag with the leaky bov replaced. I just took the car down to is motorsports to do a few dyno runs to check the a/f's and the car made 183kw's at 6000rpm with over 150kw's from 3400rpm with a max of just under 17psi boost dropping to just over 15psi. The a/f's were surprisingly good too sitting on about 11.5 at full load.
This is just an FYI that these cars have quite a bit more in them with the standard ecu and injectors. It's not so much the power that interested me with the car....it was the amount of torque!