with the high compression ratio i personally wouldnt push it past 10 unless you plan on a rebuild. i know there are some out there pushing more, but i also hear of engines being rebuilt and longevity going way down. also a good synthetic oil will help out alot.
whatever you decide to do, make sure you have a good dyno tuning shop lined up. no matter what the boost level, a tune is a must to prevent detonation. you definitely dont want any detonation at any boost level, but especially at a high level.
i'M LOOKING AT GETTING THE POWERWORKS SC AND I HEARD IT RUNS UP TO 15 PSI I'M TRYING TO GET UP TO 15 PSI. AND THE NUMBERS THEY SHOW WHAT ARE THEY RUNNING IN PSI