Originally Posted by robert@castle

There is a reason we don't make a 2 pole ROAR motor. The two pole design specified by ROAR is actually a rather poor design. All of our motors are 1, 1.5, or 2 turn motors and have 85-95% efficiency. We prefer adjust the kv of the motor by adjusting the length of the stator or the magnets. In 1/10th scale motors, we make between a 1900kv and a 7700kv motor with those 1, 1.5, or 2 turns configurations. Specifying a motor by turn count is almost meaningless because there are so many other factors that contribute to the actual RPM of the motor, but the 2 pole design has most of those locked down to keep motors as consistent between brands. When we developed our sensored motors we tested our 1406 4600kv motor vs a 7.5 turn motor on our dyno and put a 300 watt load on both. The 7.5 turn motor hit 300F in about 2 minutes and it stopped working. Our 1406 4600kv ran for 5 minutes and only got to about 230F.

In 1/8th scale there was no electric buggies until we came out with the original Mamba Monster and 1515 motor because there was no motors that could survive the load of 1/8th scale. We had to start the e-buggy class by making electric conversion kits for nitro buggies because no one made electric buggies at the time. In 1/8th scale, most of the other motor brands are similarly efficient because they have to be.

Also worth mentioning that the motor he has can do over 2hp and our 1/5th scale motor, the 2028, can peak over 10hp from a motor about the size of a soda can.