I do not have an electric pump but I am considering one. This season I started charging my battery between rounds to see if it helps. It seems to help. i sometimes will run the fan after returning to my pit to help cool the car faster with the charger attached. I feel a electric water pump would help cool it faster also. I would need a good battery reserve to run the pump during the run if I had the field off. Just weighing my options. Its only on really hot or muggy days that I start having the temp issues. It rarely gets over 200 deg. I really just want to have consistent temp and voltage during my passes.