Machined this yesterday evening for the drag car. Had to grind a custom tool for the belt profile. The motivation for this is not more power but to slow the alternator down. Since we experienced belt issues with the stock alternator over 7500rpm accompanied by electrical glitches sometimes resulting in nira shutting off! This persisted even after swapping to a 90amp and deleting P/S. It was an Alt overspeed problem too. Since the new rev limit is closer to 9k I just changed the pulley in that percentage. Most likely would not work on the street with AC etc. Im hoping the belt stays happy for now. Probably a little on the sturdy side. Rather it be a couple grams heavy and not ever be an issue.