Hi there!
Almost everyone knows the pros of an electric water pump (that what the ads tell you):
- less drag on the accesory belt
- constant cooling
- high flow even with low RPM (let's say in the waiting line on the drag strip)
- cools everytime when the key is in "ON" position, even when the engine is not running
But what are the cons? There must be something the ads don't tell you, otherwise the cars would came from factory with such a pump.
Are they loud? Do they break twice a year? Do they harm in any way to a daily driver?
Blumi
Almost everyone knows the pros of an electric water pump (that what the ads tell you):
- less drag on the accesory belt
- constant cooling
- high flow even with low RPM (let's say in the waiting line on the drag strip)
- cools everytime when the key is in "ON" position, even when the engine is not running
But what are the cons? There must be something the ads don't tell you, otherwise the cars would came from factory with such a pump.
Are they loud? Do they break twice a year? Do they harm in any way to a daily driver?
Blumi
. For $320 you get 8-14 lb/ft tq from idle to redline and it will last for 2-5 (or more) years depending on how many hours you drive the car. FYI I have had the Mezerie for 32K miles. It is really free HP & TQ, the alternator provides a fairly steady current flow to the pump, and the extra load the alternator puts on the engine is distributed over time. So the load on the engine is always the same at any RPM but the mechanical pump consumes more engine power as RPMs increase. It is a simple concept that works well and is more efficient than the original (mechanical) design. But, a brushed DC motor will eventually fail, that is a fact 
. Make your own decision but atleat you have some facts.
