Did a few different searches and didn't see a topic on this.

Anyone done it, and if so, do you feel it's worth the bother to do a conservative little bump down in pulley size?

I have an 03 JCW (and an 06 I will leave alone for now) and was wondering if 15% was worth the trouble.

 

i believe that a JCW uses a 14.8% pulley anyways, so the change in power would be minimal, if any.

 

No - we typically do the 2% crank pulley on the JCW, but changing the pulley on the supercharger would defeat 80% + of your upgrade from the JCW package. Most of the gain from the JCW kit comes from the smaller pulley on the JCW supercharger (which is otherwise identical to the '05 and later S supercharger).

Hope that helps!
Randy

 

OK, a little confused by your response Randy.

I thought that the JCW pulley on an 2003 was 13.8%. (I know the 05's (and up) have that same pulley)

Wouldn't going to 15% make a little difference on the 03? Or is 1.2% not enough to notice?

 

The pulley on the JCW is the same on all years, and the S pulley is the same on all years. It is around 14%, and the 1% really is not worth doing.

The difference in the JCW supercharger used to be not only the pulley, but instead of a ceramic coating, it used a graphite coating. In '05, all the superchargers went to the graphite.

I just don't like seeing folks pay a lot of money for the JCW upgrade, then change the pulley for a very minimal change in power.

Let me know if you have any other questions.

Hope that helps!
Randy

 

Much understood response, thanks Randy!

I knew the coatings were carried over to the S model from the JCW, and thought the 1% might garner a minimal difference.

But I'm not gonna spend a couple hours doing a pulley job if it's worthless.

 

I've heard not much difference.

 

i have a 19% on my jcw

 

Hello
I have a JCW 05 (210hp), anyone can explain me the differences of JCW Supercharger to the OEM S Supercharger? The only difference is the Pulley?

Thanks

Best Regards

 

Would it it be worth bumping to a 16 or 17 pulley?

 

!7% and OBX You would feel something then.

 

Where's the limit on over spinning the SC? Can you reach a certain point when you are just stirrring up the air ,making it hotter? What HP gain can a person expect with a 2% crank pulley? How hard is it to install? There was mention of 19% SC pulley ,would that be better?

 

best to leave the JCW alone you paid alot for it let it do it's job. It does it quite well. And yes the only difference in Supercharger between S and JCW is the pully

 

Hello
Thanks for the answer...

Best Regards