[peterd]

My main purpose for using the electric water pump was to help with cooling at idle. I am using a MEZIERE billet pump. Without the conventional pump there is no by pass hose. I had planned to run without a thermostat at all, to do this I would need a thermostatic control for the pump itself. I would be interesting in more details on you thermostatic control.

One concern I have is that without any water flow in the block (before pump starts), the engine could endup with hot spot. What temp does you pump start running.