Thanks for the replies. All makes sense.
I did read in one of my searches about the brush/comm break-in and was aware of the need to do that. Part of that thread was regarding the Evnetics guys zorching motors at 1000A but then it was apparent that they hadn't bedded the brushes fully which goes a long way to explaining the results.
I get the heat, and the need for the controller and battery to be up to the task, but they can only feed what the motor wants. Obviously you can't force current into a motor, only supply what it asks for. Unless of course you ramp up the voltage and force the motor to ask for more current.
Running a high voltage like 300V+ will cause the motor to draw more current but the brush/commutator interface would be seeing those 300V pulses even though the duty cycle say 50% would lower the averaged voltage to 150V. Am I right?
The inductance would resist a change in current, smoothing the PWM, but the voltage pulses would still be seen and I would think would stress the hell out of the brushes and comm?
I guess I am just wondering what is "special" about the custom motors that are built by Dennis Berube and Jim Husted, and how they might make motors that are superior to the standard Warp motors.
I guess like ICE's its the blueprinting and attention to every last detail that helps and a lot goes toward building a motor that is reliable under huge stress.
In another thread (ev power glide), Ev99saturn mentioned:
I'm running a single 11" GE motor that was custom built for drag racing by Dennis Berube. It replaced an 11" Warp HV that I went with originally. The Warp is a powerhouse for sure, but the Berube GE is in a league of it's own when it comes to torque and will lift the front tires off the ground on a hard launch.
The Warp 11 HV has the armature size of a Warp 9 due to the interpoles so I would think it would be slightly down on the torque of a normal 11" motor but I could be wrong here. I thought the reason for the HV was to be able to run a higher pack voltage without the arching and high RPM that it would cause on a normal non-interpolled motor?
But that would only account for a small difference in torque.
Im not disputing for a second that these motors are actually superior, just curious as to what makes these "race" motors so much better?