HadesOmega...ya, you should be fine at 5psi, just don't go any higher. Your engine won't blow if it's in good shape before you put the turbo on. I think the 4G63's run like 13psi...but that is a completely different motor...just like the supra turbo...they run like 20psi if I'm not mistaken?? I just know it's more then the 4G63's, or at least it can handle a lot more. I was stupid...I ran 10psi on a stock bottom end.

Raizin...Greg built his bottom end with the ball bearing set up. I don't know if he dynoed it though. Ask him.

What do you guys think about the thicker head gasket thing? I really don't wanna get rid of my turbo, what are my options??

Thanks again for all your help!!