I run a eb4 g3 and a er4 g3 converted to a trophy truck,the diffs are pretty strong on the g3 cars,I'm running 150amp esc and a castle creations motor with no probs,I use 5000 weight up front 3000 weight middle and 1000 weight rear,I found this give better traction on the front wheels and helps keep down ballooning on 6s and 5s