View Full Version : Supercharger Pulley Problems

07-14-2010, 10:47 PM
I have recently installed a JRSC on my ep3 and the kit came with a "6psi" pulley Which is the 4" 7 rib Pulley.
I have been looking for a smaller pulley for my charger and was wondering if anyone came help cause I can't find a smaller pulley. I know they make a smaller pulley kit for the 2006 civic si JRSC kit.

Would that one work?
HELP :smash:


07-14-2010, 11:18 PM
Pulley boys makes them. I wouldn't go smaller than 3.7". But others here have gone smaller.


07-15-2010, 06:00 AM
Yep, I'd stick with the 3.8" unless you have plans for a water/meth kit or something else to cool the intake charge with a smaller pulley. If you go with a smaller blower pulley, I strongly recommend you get the 2.5" (RSX) idler pulley from Jackson Racing as well. It will reduce your chances of belt slip and give you more room on the tensioner screw.

07-16-2010, 12:58 PM
just bolt a skateboard bearing on there! i think it's like .75"

07-16-2010, 02:19 PM
I trust also that you have kpro and not just a reflash.....order an additional tensioner pulley also they seem to have a limited life span

08-02-2010, 12:56 PM
what engine do you have?

08-28-2010, 09:54 AM
Where would i be able to pick up a 2.5'' RSX idle pulley?

I have the K20a3

08-28-2010, 11:27 AM
Post #3 has your answer...