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Old 09-04-2018, 07:47 PM   #598
PhyrraM
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Join Date: Aug 2012
Drives: '17 BRZ PP, old Legacy SSs and SVXs
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Quote:
Originally Posted by Irace86.2.0 View Post
Anyone remove the bypass valve? If so, what does it entail? What was the effect? Smoother power transfers but worse gas mileage? Is it an internal blow off valve or a bypass that only opens at medium to high throttle input?
It actually only opens at low throttle angles. It opens a path from the pressure side of the blower to the intake side of the blower - essentially a bypass that greatly reduces the power required to turn the assembly. It's a fuel economy saving device that allows the engine to revert to traditional "vacuum mode" when not under load.
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