Originally Posted by
blue247carz
Hey Chris what is the motor that you are having probs with?
I have probs running the X12's with GM speedo due to the amount of advanced timing already in the motors, they occasionally cog if I don't set the soft start high enough and they overheat even when undergeared.
Paul Pinkney
Hey Paul, it was a GM 6.5 but i hadn't shimmed it correctly. I re-did it this weekend after Mr Kerswell showed me how to do it properly and it was ok after that