ok i've been drive these things for years and been surprised but never like wow!! the other week i got a new brushless motor system for my car this thing is fast!! well tonight i was fucking around so i took a old 6 cell battery (6 c batterys) and made it a 8 cell pack and put it in the car all i can say is wow!!!!!!!!! this thing will spin out of control like no other and the speed!!!! more power then speed but wow