So for some reason when I rev the car to 4800+ rpm while racing or driving hard under load you will hear the supercharger go from a whine to a shhhhh for a split second and boost will fall from ~13 psi to about 9psi and then start boosting back up to 13psi after the shift. Its not overdriven just a stock pulley and a stock belt and all that jazz. So (in my head) either its the belt slipping because the tensioner is pretty close to bottomed out or the supercharger bypass valve is faulty and letting boost slip by over 13psi. The little hose that goes to the plunger on the lever of the bypass valve is all pieced together because it broke so idk if that would effect it (I don't really know what its purpose is). But why would it drop straigh to 9psi and not fall slowly? Im a turbo diesel guy so bear with me, Any help is greatly appreciated!