I've tried from the intake and from the turbo outlet on the IC piping. I'm going to port the hell out of it when I get back home and see if that helps.
after some discussion with the buddy who sold me the wastegate, i decided to reinstall my water injection, boost controller and see just how high the boost would go. my buddy claimed it would stop by 18psi or so. he was right. i set my boost controller for 18 and it holds. i was going to run that much eventually anyway.