Originally Posted by kickstand
I've been told you can run the nimh batts temporarily.
We have brushless Rustlers and they have the Nimh batteries in them and they fly. Will do 50 mph easily. There are many options to do what you want but probably the easiest is to just get the Traxxas Velineon brushless motor and ESC for the Slash. I converted my son's Rustler to brushless a few years back doing exactly that.