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Originally Posted by sperry
As far as the "exhaust pressure"... who measures exhaust pressure? Wastegates use the manifold pressure as the feedback loop parameter. When the turbo is making too much manifold boost, the wastegate opens reducing the force on the impeller, which lowers the boost. With a MBC, the manifold pressure simply reaches a point where it can bypass the ball/spring in the MBC, which allows the pressure to vent to the wastegate control valve which opens the wastegate. An EBC just adds a computer that monitors the manifold pressure and opens a valve to operate the wastegate depending on the boost. At no point is exhaust pressure measured.
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Exactly. I wasn't saying anything measures exhaust pressure, understand my posts. I was just questioning why you think an exhaust leak like that would limit your boost when boost control has nothing to do with the exhaust after the turbo. However, I do recognize my mistake as where a WRX's up-pipe is pre-turbo, correct? I assumed it was a downpipe by the picture
And as far as me questioing the "exhaust pressure" maybe post #62 should ring a bell. Oh, and I do have x-ray vision, that's why my wallet says "bad-ass mother fucker" on it.
And be sure to let me know when you fix it. I am curious to see if it'll correct your boost problem.