Supercharger Bypass Valve Normally Open The Key to Performance

The bypass valve shuts fully under full acceleration. With the same question in mind years ago, I pulled one apart and inserted a small magnet ... That is when you are idling or light throttle. The vacuum holds the bypass valve open so that the supercharger cannot produce boost. All the ... A new actuator for the bypass valve is available from Magnuson for about $30. It could just be out of adjustment. I am not talking about the ... There is a set screw used to stop the bypass blade that holds it open a bit. I left it as shipped from Whipple but I'm wondering if it is even ... ... normal driving where the engine is in a high vacuum situation ... open to allow boost to pass through it when boost is not needed and ... Usually I would think if the bypass valve was opening due to be stuck/broken you should get an underboost code so check for soft codes. This ... Supercharger setups without bypass valves still operate in vacuum at part throttle, so please get that misconception that you're "always ... The actuator seems to be stuck in the fully open position which would account for the lack of boost. There are no warning lights on the dash. If your supercharged car isn't making the boost it should be, here are a couple things you might not have thought to check out. This opens the solenoid valve and allows boost pressure to enter the bottom chamber of the bypass valve actuator (1) to counteract the spring ...