didn't even tell us what turbo you're planning on running.

never, ever, ever, ever, ever, ever talk boost without naming turbo you're going to run. 20psi on a T25 is WAY different from 20psi on a T67.

IMO, you should be talking horsepower figures. Finding out the limits of your motor in terms of horsepower can help you match the turbo to the motor, so you don't get a big laggy turbo to run 12psi and have a lousy powerband.