on my 3rd turbo now. the car runs for 30 seconds and the turbo is wasted. the exhuast wheel has messed up blades everytime and the intake side looks perfect. precision said something is going though my motor and trashing the exhaust wheel. so compression check on the motor was good then i went as far as tearing it all down. i have the heads off and everything looks perfect. i have no idea what to do next. anyone??