well me and my friends just got done installing a vortech S-trim on a friends 1995 cobra. well we started it up and it idled at about 400 rpms and the supercharger was making a noise like u could hear the gears .. so we bumped up the idle to about 800 rpms and you can still hear the gears it just doesn't sound right so we took the idle up at 1000 rpms and the gear noise went away and then it would whistle like we thought it was supposed to ... Is this how its supposed to sound?