hello guys. its my first post. i really need help with this one!:/ i know how a bad turbo sounds but this sound is not like that. familiar but sounds more like a supercharger. i boost leak test but could find a leak right now. only under boost. if i slowly gas it to 15 psi or up to 24 i can barely hear the whine. but! when i press all the way doe i can hear it loud and will disappear as soon i let go of gas. kinda sounds like boost leak but can identify.