hey everyone i recently purchased a Vortech S-Trim supercharger and had it installed on my 95 mustang cobra. the car runs great and I really notice an improvement. The only thing im nervouse about is the car at idle now has a raspy griding sound. Could this b from the superchargers ball bearing. I've heard the reason it sounds this was is because of the super quiet component of vortechs charger for my year. Any help/feedback would be greaty appreciated thanks in advance.