according to TRS there are several things that can be done. i am looking to liven the motor up a little. i was just wondering which would be the most cost effective options, and if anybody has tried any of these. i would like to swap to a 4.0 but thats a big project and i dont have time or resources to swap motors right now. unless somebody has a complete running 4.0, with the computer and everything they want to sell to me.