Anybody know if the GSM Paxton pulley is "special"?

**4DRHTRD** · 10-07-2008, 12:40 PM

I called Paxton yesterday to order a pulley but they said that GSM special made theirs so that there is an offset compared to normal for belt alignment.
Can anyone verify this? Anybody have one they want to sell?

Coming down to the little pieces now and need to order a pulley for mine as it didn't come with one.

**srt-hardware** · 10-07-2008, 01:44 PM

What size do you need. I have a couple, PM me

You can order any vortech pulley, and yes a little machining might be nessasary but the local guy asked for $5 each to do, its a real easy face machining job.

**hemidup** · 10-07-2008, 08:08 PM

^^^ What he said. I just picked up a new pulley and had to do the same.

**4DRHTRD** · 10-07-2008, 08:09 PM

I need whatever size will work for 6psi...
I don't know specifically, any help would be much appreciated!!!

**hemidup** · 10-08-2008, 11:21 AM

Call up their tech support line. Make sure you have the diameter of your crank pulley, the size of your blower, and max rpm you plan to run. The tech will give you the pulley size you need for 6lbs of boost.

**4DRHTRD** · 10-08-2008, 12:33 PM

I've tried calling says they're busy or out of the office.
:(

**HEMI~C~** · 10-28-2008, 10:39 PM

Chad, how much did they have to machine off? I noticed about an 1/8 of inch difference with my new Vortech pulley. Although it did go on with no probs and so far no belts being thrown despite the very slight mismatch.

By the way, in case anyone is wondering max rpm for the Novi 1200/1500 used in the GSM kits is 58,000 rpms. So in my case.... a 17% OD ATI dampner comes in at 7.074 inches divided by 2.62 x 3.50 drive ratio x 6200 rpm = 58,590 rpms Max'd out at 12.5-13 psi in my case.

Chris

**srt-hardware** · 10-28-2008, 11:27 PM

You are right, about an 1/8 in. You also will have to put a washer on the outside of the pulley so the bolt tightens on the pully and not just bottom out.