Megasquirt V2.2 with the MS-Extra code. It controls fuel only right now. I will add the ignition control at some point when I am more comfortable with the it. I'm kinda surprised nobody on here has a MS on their go kart.
Fun, but scary truck. When you open the throttle up, things happen FAST and violently. It is by and far the scariest thing I have ever screwed together. As soon as the weather cooperates, I will take it out and make a few passes at the track. Seems like every weekend has been deathly windy or raining since the track opened this year. My original goal was to only run an 11.99, but I think it can surpass that now. A 10.99 would be nice. lol