How small of an upper pulley can I put on without out having to worry about over heating? I do autocross and road course events so the supercharger runs for extended periods of time. Also will I need a tensioner and a new belt?

 

Kinda of a tough question to answer. Personally, I would not open track my car without the evans cooling mods or a heat exchanger with anythiing smaller than a 2.93. To get the most contact between pulley and belt you will need an auxilary idler and a new belt.

A

 

Even with a stock pulley Cobra, it's smart to have some cooling mods done. Those Eaton's produce more heat than you care to know about.

 

I also recommend a heat exchanger with a pulley change! Your IAT temps will increase with ANY pulley change, which in some cases can cause your computer to pull timing during WOT!! As far as belts go, if you get an aux. snub idler (which will help for belt slip) you can use your stock belt, down to a 3.0 diameter. Make sure you get a Custom tune for your car with a pulley change!! This is vital to the life of your engine. Many of the internal parameters need to be changed to compensate for the added boost!

 

i got an 03 with 2.76 pulley ,and im going with a 4 lb lower. get a bigger heat exchaner with the fans on it .my stock pulley the temp at the H/E was 105, with 2.76 pulley it gets to 134. so yes a cool one iam getting ill post a link hang one if i can find it .

 

i forgot the link, do i google on the gords heat exchanger.