i run a gt35r .82 rear housing it makes 10psi @ 4000rpm and full boost @ 4600rpm
this is in a cordia with a std vr4 4g63 motor with 272 cams and gears..
i had scm61 before this just for a comparison 10psi @ 3700rpm and full boost @ 4300rpm before i had adj cam gears..
hope this helps.