Originally Posted by
Kelly W
Hey Dave, thanks for the info.
Potentially dumb question...

Have they changed their RPM sensing scheme away from the old trusted ring magnet in the compressor nut? There are a few features machined in the inlet that I don't recognize.
Thx,
Kelly W

Maybe holes for cooling systems under purple cover..... in the car turbocharger you can find holes for eliminate surging compressor issue