What is your speed climbing 6.5% grade?

[Allmanac]

Originally Posted by Sergio

The answer is a little more complex since it depends on the ability of the Motor to turn the additional available amperage into actual torque.

It also puts the motor further away from the efficiency curve, meaning for each additional amp consumed there is minimal torque increase as most of the Armature current turns into heat, and since it is a Sepex Motor with thinner wires in the Field coil, the additional heat increases the resistance of the Field coil which in turns prevents the motor from developing torque and the Motor just gets hotter.

We all know that a stalled motor will self destruct pretty quick due to the huge current that will flow since the only resistance to current flow is the wire in the coils.

As the motor starts to gain speed, the Back EMF produced reduces the voltage on the motor which reduces the current.

The OEM motor is capable of producing more torque and if all You need is another 20-30% increase, a new controller and good batteries will get You there, but more than that you really should consider a new motor, in addition to the controller and good batteries, that is designed for the application.

And that my friend is why you are the MAN!