I think that is a great idea if you have to already add weight to the kart. I would imagine you would have to run a battery to power the EWP. I run the Davis Craig on my SCCA race car and love it. No need for a thermostat, the controller takes care of all that. I have mine controlled via the ECU and it’s speed is controlled by RPM and temperature. The DC controller basically does all the hard work and keeps the engine cool. I will have to do my homework on that since I have 35+ # of lead on the kart to make weight.
Any updates on your project?