Yes at the beguining of my isues when car arrived to Barcelona I contact to Jeff (whipple) but couldn't solve my problem so I contact Jon Lund and he did a great job.
Your car is a GT350 ?
If yes, do you have the assamble instructions of the whipple kit and could find if there is any information about the vacuum actuator ?
Yes my car is a GT350
Here is the latest install instructions from whipple. file:///C:/Users/CMC-%20PC/Desktop/MY16%20Ford%20GT350_RevA1R6_Low%20=18.pdf
From page 61.
Verify the bypass actuator is working properly. To monitor, look at the bypass arm when the motor is not running. Start engine and verify that the actuator arm has opened. This arm will be extended when the engine is above 1” of vacuum (boost) and will be open when there is more than 1” of engine vacuum. There is a great deal of misinformation about the function of supercharger bypass systems. The supercharger is a positive-displacement pump; that is, so long as it is rotating, it is always pumping air. During low demand or high vacuum operation (i.e. idle, deceleration, and light throttle cruise), the pumping action is undesirable as it creates unwanted heat and noise. The bypass circuit, when open, prevents any pressure buildup across the supercharger and allows air to circulate through the rotors, allowing the supercharger to “idle” freely during these conditions. This results in reduced noise, and by reducing heat buildup in the intake, significantly improves street and strip performance. As throttle demand increases, the bypass circuit is closed, resulting in full performance and strip performance. As throttle demand increases, the bypass circuit is closed, resulting in full performance from the supercharger. The bypass circuit is never used to limit or control boost during full-throttle operation and defeating or altering the bypass function will not result in improved performance in any condition, and will result in poor drivability and possible supercharger damage.