My 05' will typically do 7-8 psi when it's in the mid 90's and I've seen 10 at 80* on a 2-1 downshift. It had a 3.4 when I got the car and hit about 14psi but I changed back to a stock supercharger. The other day it was 99* out and accelerating onto the freeway with IAT's in the 160* I was getting 4.8* of KR. I'm also damn near below sea level.

Jeff