LEE-RS

Is spot on, and the rest of you are frankly talking garbage It gives massive benifits in truth. My 1600 indeed made 210hp @ 11psi. The very same day, a number of RS turbo's ran, which i had a large hand in building. Std car with 16psi of boost made 177. Another std engine, running on 18psi with a pro alloy cooler, 3 in bore zorst, filter etc just nudged 200hp. And mine did 210 on 11psi on a std cam. The power all comes from the head, it just revs so much more.

The notion that a turbo just forces the air in is total rubbish. A normally aspirated engine also has something forcing air into it's cylinders - atmospheric pressure. A n/a car runs 14.7 psi of absoloute pressure if you like. We open up the ports etc and the power goes up. If we then add more pressure (using a turbo) it will flow even more air and power will go up. Blow through a small staw, then blow through several - which is easier? This is exactly how ur turbo sees it. You're blowing with the same pressure each time - but with lots of straws - there is more volume of air moving.

A worked CVH is very very good - it will flow shit loads of air.