The Turnigy motor that is 2650KV is sensorless, which I'm not sure I want, as I've heard that sensorless systems are prone to "cogging", which isn't good for racing! That's why I was looking at the 2350KV motor, because it is a sensored motor.
I guess I could go with 4S if needed. The esc is rated at 120 amps.
Not sure yet what the grip will be like at the kart track, as no one has raced on it as of yet. But, it DOES look to be very clean and smooth, so hopefully the traction will be decent. So the solid spool will hopefully work well there.