Re: Puff of air - Saab 9000 Bulletin Board - Saabnet.com
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Re: Puff of air
Posted by Erik919kt (more from Erik919kt) on Wed, 23 Aug 2006 06:46:15
In Reply to: Puff of air, Big Guy, Tue, 22 Aug 2006 19:33:43
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I agree with the other posts, but some clarification: When the turbo is producing boost and then you abruptly take your foot off the throttle to change gears, the mass of air hits up against the closed throttle plate, and a pressure wave is sent back in the opposite direction. Without a turbo bypass valve, this pressure wave will hit the turbo's impeller blades and try to spin them in the opposite direction from their usual direction.
posted by 69.130.1...
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