good luck with this dude.i run around 130 to 145Psi and that was fresh built,pulls spot on! I do find turbo cars running over 160Psi a bit extreme.But alot of people tend to run slightly higer comp pistons for quick low end grunt,less lag.But i dont have that problem.I ran 5/30 for bedding in and turned boost down to 5Psi for around 700Miles.Changed oil few times during the 1000Mile bed in period too.