Re: Larger crank pulley in, testing begins... (G60Jetta2dr)
I would think that I larger crank pulley would actually rob power since it has to work harder to spin the alternator and a/c compressor. Sure you are spinning the charger faster, but you are also spinning the alternator and a/c compressor to higher speeds as well which causes more parasitic drag on the whole engine. If you want your charger to spin faster, just get a smaller pulley and save yourself the effort.