RE: Corky Bell from his book Maximum Boost.

Big power projects come from external wastegates, not internal ones. He states internal wastegates cause turbulence and backpressure and the same turbo with a well designed external wastegate will produce superior power.

If you haven't bought the book then you might want to, its very informative.

warmonger

Former owner of '99 CSVT - Silver #222/2760 356/334 wHP/TQ at 10psi on pump gas! See My Mods '05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red '06 Mazda5 Touring, 5spd,MTX, Black