Yes, the ProChargers make noise that you'll definitely hear. Even the SC models which ATI claims are quiet; don't believe them!
As far as the belt pulley air issue, I had heard that about roots-style blowers, but I'm wondering if that's true with the centrifugals. I'm running a D1SC with an 8-rib serpentine belt and it's louder than I wanted. The reason I question the drilling of holes (which I'll do if it works) is that the serpentine belts are also used on all late-model cars with no noise. I've had 8-rib serpentine belts running A/C compressors, alternators, etc. and you don't hear a thing. But I fire up this ProCharged engine and you immediately hear the blower whine; seems louder at idle than higher rpm's.
Jody
As far as the belt pulley air issue, I had heard that about roots-style blowers, but I'm wondering if that's true with the centrifugals. I'm running a D1SC with an 8-rib serpentine belt and it's louder than I wanted. The reason I question the drilling of holes (which I'll do if it works) is that the serpentine belts are also used on all late-model cars with no noise. I've had 8-rib serpentine belts running A/C compressors, alternators, etc. and you don't hear a thing. But I fire up this ProCharged engine and you immediately hear the blower whine; seems louder at idle than higher rpm's.
Jody
