bov sounding like a supercharger...??

[gsttuner22]

Guys....i was experimenting with my BOV's, i took my Type S insides and put them inside a Type RS. Now it sounds like a legit Type S. But when im in boost spiking 15 psi it literally sounds like a supercharger whine and i feel the car slightly give a little umhp....Any tip, or thought of what it might be ?

 

[Purevil]

Its probally an air leak. It shouldn't make any noise at all until you let off the gas. The easiest solution would be to put the proper guts back inside your bov.