ORIGINAL: savagecommander
the turnigy monster would be the best bang for the buck- watch your temps though, when youre slogging it off road any power not directly converted to motion is wasted as heat. 5000 watts of heat. i suggest running the clutch or installing some type of slipper unit.
A clutch would be a VERY bad idea on a big electric conversion like this, Even with a 8mm shaft it can easily be snapped, I mean imagine that motor spinning and then just engaging full force with all that tourqe...Ive seen it happen not a good idea to run a clutch.