Sounds like you got it setup good now. Should be able to sit back and enjoy it with no worries of headgaskets going out. How do you have your wastegate assembly hooked up now....solenoid, lines? The knock you are seeing is just shift knock. I get that. I would recommend a knock gauge in the car, because you never know when your going to get a bad tank full of 93 octane. Or certain gas station's gasoline just isn't as good as others. -Nick.