Ok so after running the stock 9psi pulley for a while I have upgraded to the 3.70" pulley (8 rib). I like using the gates belts. i was wondering what size belt or part number some of you are using that run that pulley? It would be nice to get some of the guess work taken out. It took a few guesses to get the current belt right with the 4" pulley. I would like to avoid that if possible.

 

Half inch shorter than what you have now should do the trick.

 

Good deal. Thanks Willie.