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  1. GBeaty

    Exhaust scavenging on a turbo header

    Thanks everyone for their input. One clarification: I'm asking this because of my observation of the lack of performance difference between a tubular header vs. a cast log manifold. The equal-length headers offer smooth transitions and collectors, while the cast iron manifold makes poor (90...
  2. GBeaty

    Exhaust scavenging on a turbo header

    I have seen many site detailing the process of exhaust scavenging on NA cars, but never a turbo one. I would assume it works the same, but there are a few things I'm curious about. The pressure in the exhaust manifold gets considerably higher than atmospheric. Doesn't this change the resonance...
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