Everything mentioned in here we have tried, this was just last summer. We even did a 23mm to 17mm hex conversion so we could put lighter truggy tires on it, still to no avail. Any timing and gearing combo you can imagine.

You have a 7.7KG truck, that's 17 lbs dry weight. Pull out the engine and tank, put in the electric conversion kit, motor, electronics, batteries and the truck is over 20 lbs. It's weight was 20.2 to be exact. You have erevos that weigh in at 9.2 lbs (Before Batteries) with the same motor that lots of guys overheat with little to no effort. Short story long, he pulled it all out and sold it, put in a LRP mill. Whatever you decide to do I wish you more luck then we had, it didn't help us that the ambient temps whilst playing with it were in the mid 90's to lower 100's either