No noticeable loss of power. It also isn't the "rocks tumbling in the supercharger" sound (as that is all of the time since the supercharger is always spinning). I would think that even at high RPMs that I would get the sound since the supercharger is powered by the belt and the belt is moving whenever the engine is running, but it is only under boost. I guess I could have taken the belt off though and just "disengaged" the supercharger to see what would happen. We will see what the shop comes back with and that might be the next step.
If I could equate the sound to anything, it would be a "tinny" (not tiny) year airy sound. Almost like an exhaust leak, but it is under the hood vs. under the car(manifold leak maybe?) and that could be a possibility to some degree if the leak was only present under increased pressure caused by the supercharger.
Again, just rattling off ideas. Not saying that is what it is of that it is even mechanically possible.
