Not always, a T25 has a lot of back pressure at this boost level. A T25 is pretty safe at 10 psi. Back pressure equals reversion. Mike --- Aaron LaBeau <amlabeau@csusm.edu> wrote: > First you'd need to know what kind of turbo your > running. A T-25 will > certainly be safer to run at 12psi on street gas > than a T3/T04E.