Something just occurred to me while looking at my pulley. It appears to be the outer groove that's rubber mounted. I don't need this groove anymore since my AC bracket has the compressor and PS pump sharing the second groove. I'd like to keep the larger diameter inner groove to drive my water pump faster, so I'm somewhat hesitant to a factory 2v pulley - although I'm sure the little Sanden compressor puts a lot less demand on the system than the factory unit, I want plenty of cooling overhead.
Even though I'm not running anything on the third groove, I have fears of the old rubber breaking loose and hurling that ring through my radiator
What if I just burnt the rubber off of my factory 3v pulley? I would think I could then remove the third groove. That groove does have drill dimples in it that I assume are for balancing, but other factory pulleys don't seem to and I assume it's just because the rubber + third groove weighed so much. Perhaps worst case I could have it balanced at the machine shop after burning off the rubber and removing the groove. Thoughts?
