Originally Posted by
old_dude
We stuck three Trackstar motors on the Motolyser (sp). At the + sign they were between 44 and 53 degrees of timing. Those are really where the motor produces at about max efficiency. So with that said, adding more timing is probably not beneficial. There lower speed is from a high resistance stator (compared to other motors in the wind).
Mine (13.5T) maxes out at 33 degrees, as measured on a GForce motor checker. That's much lower than most other motors. It's nearly identical to an old Novak SS Pro I have (34 degrees), and the KV of these two motors is also very close (3030 vs 3150 RPM/V). Maybe the 21.5T versions have been changed for more timing?
A higher stator resistance (within reason) has little effect on the KV constant of the motor. Rotor size and strength has more effect.