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rattlsnak rattlsnak is offline
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Join Date: Nov 2000
Location: Atlanta, Ga
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think of it this way... inside the wastegate you have two halves. One side has the spring, one side has a vacuum chamber. The spring keeps the outlet valve closed. When you get under boost, which is 'pressure', it forces against the spring and overcomes it, allowing the outlet to open, dumping excess boost. If it didnt, it would overboost and you blow the heads off your engine. As long as the turbo is spinning, 'under boost', the pressure vs spring rate, either keep the outlet valve open or closed. In theory it should either be open or closed, but im sure you could measure it moving to some degree. So practically, when the pressure overcomes the spring, valve open, when you decel and boost goes away, spring overcomes pressure and closes outlet. It shouldnt 'waiver' or flutter. It should either be open or closed.
Old 05-09-2007, 07:21 PM
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