I was wondering how much psi the stock turbo is set at and how much you can raise it without messing up anything. thanks for any info

 

For WRX, it's 13.5 PSI. Raising the bar... there are multiple ways of doing it. Some install bigger turbos or simple bolt ons like up/down pipes. Without messing up anything... eh, that's unpredictable. You're basically modifying something that's working properly and set to specific specifications. By pushing it, there is a chance of messing up something.

And I suggest reading and searching more.