you better be seeing John at Secret Services if you wanna run that much boost... and as a matter of power...theoretically speaking, say a 20G makes 300whp at 15psi on your setup...a Big 16G at 15psi isnt going to make the same power..when people say psi and dont give say what turbo, all i know is how much their fuel pressure raises at full boost...

i just forsee many problems with you trying to run mid/big turbo's on that little 1.6... try out a 14B first since u have one, see how much lag you get with it at 8psi and then see your power output...if its acceptable, work your way up. if it spools up just right, or a little too quick for ya, clip it. like i said earlier though, your endeaver needs to be well planned and thought out...talk to John at SS though, he is probably the man to see regarding getting the car tuned in and better recommendation of turbo selection for your application.