Quote:
Originally Posted by California98Civic
I have seen guys claim test results, even dynos, that show their electric water pump set ups save anywhere from 3-7 hp over the mechanical kind.
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Yes that's correct, but at typical engine speed the power requirement is much lower. In terms of dollars spent per hp gained/saved, it's pretty good, but often quite a lot of hassle due to how the water pump is integrated into the block.
Since the water pump is a necessary accessory, I am more okay with it running off the belt than a PS pump, but would try to find an underdrive pulley to cut the losses a bit, unless rerouting the belt is easy. 20% underdrive = 48% less power, in theory at least, and if that turns 3hp into 1.5hp or 5hp into 2.5hp at redline, I can stomach that.