NoItDoesntHavePopups

Sup my dudes got an nb2 turbo with the kraken kit and 3 inch down pipe .Recently removed my gt2560r to port the waste gate to help with boost creep. Since, i've reinstalled it and i'm getting a nasty vibration/rattle whenever.

At the begining I inspected if the exhaust was rattling on anything and discovered it was touching all of my butterfly braces and the front subframe. So I loosened up my amnifold to turbo nuts and shifte the turbo upwards(taking as much of the stud slack i could)
And it seemed to solve a part of the problem.

There no rattling at idle but when i rev the engine its seems like around 3800 to 4k i get a resonance and whenever i go wot i get a nasty ratlle/resonance

*NOTE before i removed the turbo this rattle was present but only in first gear wot situation and verry slightly

*other note, engine is fully built and assembly including crank balanced + fluid damper

Anybody has an idea of what it could be? Did the waste gate porting could cause this kind of resonance?

sixshooter

iTrader: (12)

You've determined it is making contact somewhere.

Z_WAAAAAZ

Regardless of what motor mounts you're running (unless solid), the exhaust is going to move with the rest of the motor. Six is right, you've already confirmed there's contact/tight clearance.

Will it happen while free-revving or only under load? I'd put the car on jackstands and have a helper rev the engine up to where it makes the resonant frequency. Then get under it to check if/where contact is being made.