I have only had experience with the older early electric pumps. They worked fine on my bracket racer. But they caused me nothing but problems on the street. Not enuff circulation volume. The one setup used a pair of pumps and when the water outlet temp got up to around 210. The impellers in the pumps would swell, slowing down or stopping the pumps. Needles to say this was a real pain. First trying to diagnose, then trying to correct. The pump system manufacturer was of little help. They discontinued the systems with that style pump.

I went back to different pulley sizes on mechanical pumps..