the reason why i ask is. if you had a dc electric motor (like you have on those electric scooters)powered by ni-cad batteries (which are topped up by a adapter-charger auto shut off from the altenator) thermatically controlled, you could probably throw away your thermo-stat. the added bonus is when you turn the engine off, a thermatic fan and thermatic pump are circulating and cooling rather than water suddenly stopping and being heated more in certain areas (especially near turbos and cylinders)the circulating coolant is being slowly cooled until it reaches a set temperature say 65degrees c. this would also reduce the stress in engine components being subjected to extra heat. by the way this is JUST a thought.i do not have the resources to prove or disprove ok.postulation only.
Davies Craig EWP The Electric water pump has been arround for a while now with mixed results. I believe John from UAS uses one on his race car. Davise Craig produce one http://www.daviescraig.com.au/ and explore from there.
Yes good idea If taking this path i would run davies craig water pump, pump controller. If you had good electronics background you could easily make your own controller and save your self $200. Run a two turbo timers, one for engine to idle down. The second to run the pump and electric thermo fan after the first turbo timer shuts the engine off. Just run an idependent relay to power the devices, fit resistor to control flow of water around the engine so that as it pasts the radiator the fan has time to cool the water, fan runs full speed. Thermostat switch to shut down the system is a good idea, but perhaps making things a little too complicated for a simple purpose. Having two turbo timers means you can leave your car unattended when the pump and thermo fan are running. If you were relying on a thermostat alone you could come back to your car with flat battery, so if your really like perhaps turbo timer and thermo switch in conjunction. Also most the heat soak would occur in hot areas of the engine ie turbos, block etc.. So a thermo probe fitted on rad pipes or radiator will give a cooler temperature.
Yep have fitted one of these and the controller to a 12A turbo RX3 with a thermofan with awesome results to the torque of the motor and smoothness. The controoler can be setup to do the functions you are talking about because from memory we had to fit one as the engine was taking for ever to warm up(you are able to remove the stock water pump and thermosat. We were originally running it of a switched relay from the ignition. But the power is there to be had and is a good gain for the cost. I will start exploxing the thermo option again soon for my TT. Had to abort the last effort due to a bodgy temp gauge, and the thermo made a noticeable difference in engine response and smoothness. MattB
