Completed the installation of the HE351 with a Wicked Wheel II.

Did a couple of WOT runs to 90ish - The shift points have changed a bit (shifts sooner than before). Seems to pull harder 2000 - 2500 rpm.

There is a low whine or whistle that starts at about 10lbs of boost and gets louder as the boost climbs.
Is it the Wicked Wheel, or the bearings in the turbo, or waste gate, or boost elbow?

 

there are no bearings in that turbo and the waste gate comes on around 27psi. my guess is its the wheel

 

It's kind of a piercing whine - probably from the Wicked Wheel. Going to have to figure out how to insulate the cab from the noise.