I have a mini me swap done on my d15 with the z6 head now im wondering will the compression be to high if i turbo it?

 

Compression is never to high to go FI. Don't misunderstand though... Basically, the higher compression you have, the less pounds of boost you can run with an equivalent tune. There are some guys that boost 12:1 motors, but that have forged everything and a better tuner than you can afford.

As for how much pressure you can withstand on an average tune, I can't help you there. Check with the guys in the Forced Induction forum; they'll be able to give you some solid answers on that.