Electric water pumps (was) alt charging cont sw

[Gary Derian]

Yes!  Lexus even uses a hydraulically driven fan to get mechanical fan like
cooling power at low road speeds and electric like power savings at high
road speed.  Caprice taxi and police cars all have large mechanically driven
fans whereas the normal road cars get electric only.

Gary Derian <gderian at oh.verio.com>

>>
>>The reason water pumps are such a large HP lose is cause they need to be.
>>You
>>can slow em down some, and in some applications take em out.  But, for a
>>street motor,
>>they is what they is.
>>  For you to have an electric motor pump as much as an oem waterpump
you'd,
>>have to have a
>>big a-----  motor/pump to replace it.
>>  For fast warm ups use a recirculating thermostat
>>Bruce
>
>Bruce is right on this, completely. (Or is it one of the little guys?)
>
>There is even a good debate possible as to whether a high pressure fuel
>pump should be electrically or mechanically driven, let alone a water pump,
>or an engine fan (if you are working an engine any kind of hard at low
>speeds for any length of time)!
>
>For any sizable auxiliary drive loads, a mechanical drive is way more
>efficient than an electrical one.
>
>Regards, Greg
>