Originally Posted by PA/XFIRE
I believe i've read somebody out there is selling a single pulley that is the same size as the oem pulley but has less mass therefore spins faster giving you more boost from the s/c. Also you can use your oem belt. Does anybody else have any knowledge about this type of pulley. I didn't mean to highjack this thread, i hope nobody minds. ILLCYA
If it is the same size, then it will spin the same speed. Although the mass will possibly allow it to rev quicker, the overall speed would be the same.
The only way to increase (or decrease) the speed would be to change the ratio between the pulleys in the system. To do this, you have to change the size of one or the other.
SQ