Originally Posted by wfdfiremedic
Turns are basically the number of times that a wire is wrapped around each pole of the motor. Ex: A 19 turn motor will have 19 turns of wire around each pole of the motor.
A higher turn motor will have less RPM with more torque. A lower turn motor will have higher RPM with less torque. Basically, the lower the turn motor, the greater your top speed will be assuming the motor is geared correctly.
I would suggest checkpoint motors for brushed motors. Maybe look into the 19 turn checkpoint money motor.
The quote above is for a single-wind motor, in this case a 19 turn single, or 19x1. If you see something like a "19x2" or "19 turn double" then there are 2 strands of thinner wire making 19 turns around each pole of the motor. Therefore, a 19x3 (19 turn triple) would have 3 strands of even thinner wire wrapped around each pole. Same philosophy for x4 (quad) and x5 (quint).
A higher wind motor is like a VTEC engine. There's more power at higher RPMs. A single-wind motor will have more power at lower rpms. If you run on a long track, or you want to go for a speed record, go with a multi-wind motor. On shorter tracks where acceleration is more important, you should stick with a low-wind motor.