Have a 2006 Factory JCW and looking to upgrade the two pulleys. Which is best for back road hooliganism?

Stock JCW SC Pulley + 2% ATI Crank Pulley
17% SC Pulley + 2% ATI Crank Pulley
17% SC Pulley + ATI Crank Pulley

Seems like the last choice is best as to give better low/mid range TQ. Just figure I would ask before ordering. Thanks!

 

I went with the last choice on my S, 17% + ATI pulley, and also cam/injectors/4:1header/highflowcat/jcw mufflers. You can here it here..


I did not touch my JCW pulley, I autocross that car and if you put a pulley on the car it bumps you to SMF

 

Did you replace the SC with another one with the 17% pulley? or did you pull the pulley off and replace it?

 

used a pulley remover tool and removed the stock pulley

 

Honestly, this is a tougher question than you would think.
The 17% / 0% is the best answer, but... JCW pulleys are notorious for being difficult to remove (esp '05 and later) so the JCW / +2% is a very good solution.
Sorry this isn't much help, but figured it should just be said anyway.

 

Indeed. The labor and parts saved on the JCW + ATI is attractive.

 

Another alternative is leave the JCW pulley, go with Way Motor's 2% ATI over drive and install Detroit Tuned's BPV. That will get you up and possibly over 15 PSI of boost.

My friend has a 17% while I have the JCW/ATI but I also have a cam so I rev up faster but once he gets going the 17% with the extra boost makes a difference.

 

Yeah looking like the 17% is the way to go. Nice Video btw Mega!

 

Start with just the 2% ATI as you can reuse the same belt and it is really easy to install. Then drive it and see what you think.
https://www.waymotorworks.com/super-...ulley-r53.html

Later you can add a smaller supercharger pulley to get more out of it.