Originally Posted by EVfun
It sounds like there is an issue with the current limit. Usually the Curtis is noted for having an excessively slow throttle ramp rate that pretty much prohibits a decent burnout.
If you want to moderate the throttle you can put a capacitor in parallel with the throttle pot. This was done a few times to tame the older B model Curtis controllers in reverse. It is a variable voltage set by the resistance across the pot.
If that's so I wonder if I could use an external supply and generate a voltage through the pot and apply it to the correct terminal, which I also don't know which one it would be.