Quote:
Originally Posted by oil pan 4
"Super Chevy did a water pump dyno test and didn't even report results from below 3000rpm, because they couldn't measure it."
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The power the pump uses at 6000 is going to be something like 8 times greater than at 3000, so it's not unreasonable that they'd have trouble measuring it.
But just because they had trouble measuring it doesn't mean it's not significant. A few hundred watts is a solid few tenths of a gallon per hour.
Anyways I would look at the pulley diameter ratios and just run the water pump as fast as the OEM pump is when the engine is spinning at 2000rpm. I've heard people say that flow doesn't increase much past 3-4000 rpm on most engines, and you would think that they'd build in enough safety margin at 2000rpm. Maybe wire it up so that it pumps more water at higher throttle positions or something and slows down to 1200rpm otherwise.