Assuming the car is running right at stock boost level. I would start at 15psi and keep raising boost 1-2 psi tilll egt,wideband o2,or stock o2's are within range w/ NO knock at WOT. It will take a few short blasts down the track to get the boost dialed in all gears. Keep an eye on knock and o2 values!! I usually let off when I see more than 2deg, but that's me. Good luck, be safe, and most of all have fun!!!