Series 3 13B stock turbo limits
 

Hi all,
I'm planning to spend some $$ on my RX. Currently have stock turbo and wastegate with recently added Wolf3D 500 ecu. I still have standard injectors and plan to unless I replace the turbo.

I was wondering if anyone knew how much you can squeeze out of the factory turbo and at what pressure the wastegate is set at?

I've upped the boost to 12psi but would like to try for 15. is this doable without changing turbo/ gate on stock injectors?

Many thanks to all!