Get the snub on or the whipple adjustable idler and it will be good.
Not to throw a wrench into your thoughts…my blower was leaking boost at the blower-to-manifold gasket. Here is the video. I noticed similar symptoms as you, although my boost seemed to be lower than expected through the rpm range. Very little belt residue to assume belt slip for mine.
Yours seems to be belt slip…
Not to throw a wrench into your thoughts…my blower was leaking boost at the blower-to-manifold gasket. Here is the video. I noticed similar symptoms as you, although my boost seemed to be lower than expected through the rpm range. Very little belt residue to assume belt slip for mine.
Yours seems to be belt slip…