Originally Posted by glennhl

In order to really tune an electric motor you need a dyno. You can do a pretty good job with just a motor analyzer. Just adjust the timing up until you get a big jump in current. Most people use 6 amps as the place where the amps starting really jumping up quickly. The thinking is anything above this value you are just wasting energy by making the motor run hot. On all of my motors, this sweet spot is between 45 and 50 degrees. You really wouldn't need a motor analyzer if the motors had accurate timing marks, but they do not.