Its hard to compare KV ratings as the 8.5 type motors and the Castle Mambas are two completely different types of winds in the motor.
A 4600 will run with an 8.5 pretty easily but like anything else it is gearing, driver and speedo setup will determine the rest. A 5700 is in between a 7.5 and 6.5 as far as KV rating goes but it is comparable performance wise.
Very helpful, thanks.
Has anyone tried using the esc to usb wire from the tekin on the castle? The wires seem like the exact same thing...
Obviously I would download the castle software for it.