Electric Water Pump - Pumping Losses

Test 3-Weiand # 8217 electric pump

Weinrich also make a few adjustments to the Edelbrock 650 AVS carb, just to be sure power was at a premium.

Weinrich also make a few adjustments to the Edelbrock 650 AVS carb, just to be sure power

Would A Racing Pump Have Worked Better?
You're probably wondering why we didn't also test a Weiand Team G race pump? That's because, while those pumps will use even less power to run than the street pump, they're designed for a higher rpm usage than this motor would see. The racing pumps are typically made for circle track engines that rarely run below 4,000 rpm. Our street engine will rarely see above 4,000 rpm so we thought that'd kinda' be like running slicks on the street. Sure, we know it'd work better, but it doesn't make sense for the everyday commute. Also, race pumps have impellers that are designed for efficiency at high rpm and will flow even less water at idle. Therefore, they may also cause overheating in traffic, just like underdriving your pump might do.

The Weiand electric pump does not seal the bypass hole in front of the small-block, so we had to run a greased-up tap into the hole and install this plug to keep from spilling water all over the floor. The plug can be removed later if we want to go back to a mechanical pump, which uses this hole.