15-04-2013, 08:29 AM
With the car running more horsepower, if accelerating hard the engine revs will take less time to get from x revs to y revs, when running an alu pulley there is no dampening from the massive vibrations from the crank, so with running more hp the vibrations and the propensity of the belt to vibrate is higher, so more wear. I've ran the improvised setup a few times following what's been said on the forums, IMO, it's just not worth taking the risk when a setup option is already available.