Did Pro Charger really tell you that if you change the pulley it will void the warranty? I find that hard to believe since I have seen nearly every possible pulley option available on everything from a P1 to a F2. On the other hand how many broken Pro Charger units have you seen? I can not recall any.

Have you thought about alchol injection?

 

Careful on that tuneup. Watch for knock activity if your tuning it... big boost on pump gas can be an issue. Dont ask how I know