Quote:
Originally Posted by Gearhead999s
Do these superchargers not have a bypass valve which is effectively the maximum manifold pressure control?If I remember properly these are are controlled by the ECU to control boost when the throttle is closed & maximum boost level which is also determined by pulley size.I have not owned a S/C car in over 20 years so maybe this is all an out of date technology.
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The bypass valve is vacuum operated so it dumps boost when the throttle is closed like a BOV.