As title states, wondering what size pulley you guys recommend on an 06 JCW. Had a WMW 15% on my old non-JCW. Is there a bigger issue with heat as you get into 16-17% on a JCW vs a standard S?

 

If you have 93 octane and don't track your car, I would go with a 17%. The issue with heat comes from longer, high RPM runs. Street driving should be fine with a 17%. Unfortunately we only have 91 readily available in CA.

 

Since you have a JCW the most popular thing to do is go to the 17% if you aren't going to track the car. This will give you more low end than the JCW, and enough gain to make it worth the swap.
Since you already had our 15% before, here is our 17%
http://www.waymotorworks.com/17-supe...ulley-wmw.html

 

Like WAY said go with a 17%, I'm going to swap my 15 for a WMW 17 next spring.

 

I couldn't make up my mind so I ordered a 16% from you earlier today hopefully that's a decent compromise.