[coolhandcountry]

If the cells holds 3.5 volts at 143 amps 4s will be at 2000 watts.
The buggy probably took less watts than a emaxx for sure.
50 mph is not bad though.
How fast do you want to go?
Are you going for speed or racer?
If you want alot of speed and power go up on voltage.
If you don't want to spend alot of money. A 7xl may be a good choice.