hallo everybody

could you please someone help me on this?
i have an audi a4 b6 1.8t quatro 163 ps.
im thinking of changing my k03 to gtrs eliminator .Ihave already installed greddy profec II booost controller.
up to what bar pressure i can boost the new turbo without harming the internalls?
do i have to ghange the clutch if i use it in low pressure ?
i have change the downpipe to 3" and move the cat ferther down .
What about fmic? i m thinking of buying the awetuning clutch and fmic what about ?
thanks!!!!