you could be looking anywhere from 0 whp (blown engine) to like 500+ whp with gt42 and 15:1 comp pistons running on methanol, and possibly adding NOS to the setup.

or the other way around would be to tell what turbo you're using, or to tell what whp you want...

either that ^ or there are some new turbo cams that come at 12 psi that I know nothing about