Quote:
Originally Posted by norton
Why the electric pump?
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I'm sure Rosco will have an answer to that, but as the company I used to work for sells this kind of equipment, I think I can give an an answer too
With an electric water pump, like the EWP's from Davies Craig, if it is connected to an electronic controller, the water circulation in the cooling system does not depend on the engine rev, as it does with a mechanic pump. And the cooling needs of an engine are not always propositional to its rev (overheating when the engine is idling in traffic jams for example, or too much cooling at high speed, when not necessary)
The electronic controller is normally connected to both the electric water pump and the electric cooling fan. It detects the water temperature, and adapt the speed of the pump (and the fan when needed) to maintain the optimum temperature in the cooling system, independently from the engine's rev, providing the engine with a very constant temperature. The electronic controller can be set to the optimum working temperature of the engine.
The second advantage of an electric water pump is that it does not take mechanic power from the engine (as a mechanic pump does), so a few hp can be gained.
Hope this answer your question
