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!
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