......or tell your friend to get a boost gauge. see what's going on. u can control the internal wastegate also by making adjustments to the actuator arm. the problem is, you'll never know what boost level you're gonna end up with. as far as sounds, if you're referring to the BOV, it's not gonna go off loud because the outlet or release nose is most likely be re-routed to the intake side again. that is how stock turbo with wastegate usually are.......
