This motor I have been looking at from Cloud Electric and seems like a very good motor, has anyone had experience with these? Are they worth there high cost?

On a related note, has anyone looked into dynamometer testing for either their drive train or entire chassis? 

In another electronics for electraton project I have been playing with connecting a car generator to the motor and using it as a engine dyno. I kind of works but it need to be calibrated to provide much in the way of useful data. The generator efficiency changes as RPMs and output increase so you can't take a Volts X Amp as the a linear indicator of the output of the drive motor. Safely, fabricating a proper dyno with load cell is above my skills this season.

What are other teams doing, if anything to test the efficiency of the drivetrain on the bench. I apologize for my obsession with bench testing. I am from wisconsin. I would have to put snow tires on my vehicle to do track testing six months of the year :)

David

I know this was posted a year ago... but this motor is simply ok. We have run a DOE on it and it had a peak efficiency of ~86-87% at 21 motor volts nd set all the way delayed. It has to be broken in a ton as the first few tests we ran were in the high 70s. This is not the best motor for Electrathon as advertised on cloud electric. It is, however, more efficient at very high amps as seen on the manufacturers specs. Electrathon simply can't use the hundreds of amps that motor needs to get efficient. This motor also has very low RPM compared to other motors we have used. We have a PGM motor from the 90s that is 89-90% efficient, but this was made before the company was bought out I believe.