ernest2,
ESCs have a maximum current handling ability and voltage. Exceding those ratings usually means a dead ESC, or at least damaged. The thing to do is run a 'stall' test on your motor(s). Whatever that current draw is should be less than the handling abiolity of the ESC. For two or more motors, do the test on one then multiply that by the number of motors. That assumes that all the motors are the same. Then you know what the ESC has to handle.
Turns. The number of turns is the number of windings on the armature of the motor. The normal 'average' number of turns is 27. Motors with less than that usually run at a higher rpm, and draw more current. That also means that the wire making up those turns is larger, meaning less resistance, meaning more current carrying ability (and draw). Any motor will draw so much current at a particular voltage level. If the voltage is higher, then the current is less. If the voltage is lower, then the current is more. Rating motors by the number of turns sort of makes sense, but not much. Rating an ESC by the number of turns it can handle is totally stupid, it doesn't tell you a thing about it's actual capabilities. Don't ask me why they do it that way, I'd have to make an uncomplimentary guess.
- 'Doc