I had this argument with someone last night over AIM, and I just thought id post this here as well....

turbo's dont "put out" PSI. They flow CFM. PSI is a measurement of a characteristic of air. There's this facination with psi and most completely disregard CFM. 15psi on what?.....a T2 or a T78. One wouldn't do jack for your motor while the other would jack it up and have you cleaning up chunks of metal.

www.howstuffworks.com

they have a turbo section.

Go read it.