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Old 05-30-2020, 08:48 PM   #17 (permalink)
serialk11r
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Quote:
Originally Posted by redpoint5 View Post
I'm about 100k miles in on a UR underdriven pulley set on my TSX. Can't say I noticed any differences since I made the mod fairly early on in my ownership of the car. One worrying thing to me is that the original crank pulley had a damper on it, and the UR one did not.
I am not sure how much machine shop time costs, but an idea I had was machining stock pulley grooves to reduce the diameter and then adding mass to the pulley to restore its original harmonic damping.

You can also lightweight it at the same time by machining out the center, which usually has a lot of excess steel.
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