for the most part, yes that is correct. however, I wouldn't base your estimation of how much you're bagging on your turbo on RPM's alone. our cars can make full boost, and maximum torque, very low in the RPM range. if you're driving it under half throttle or more, you're heating up the turbo enough to the point where you should let it cool before you turn off the engine. if in doubt, let it cool down a bit. you'll be better off in the long run.