Electric water pumps (was) alt charging cont sw

[Clive Apps Techno-Logicals 416 510 0020]

> 
> 
> OK, but a 1-2 HP electric motor is alot of weight, no?.
> Then the waterpump coupling (mechanial/coolant), and pump itself.
> Now a hydralic pump is another matter, since at low speed it's use could be
> shared with the power steering, or for running a supercharger off of
> hydralics.
> Bruce

I would go hydraulic as well
best use of power, less conversion loss
and not depending on electrics to move your coolant
still mode for failure
but not as bad as electrics, at least hydraulics give you a warnign as the
motor wears out

Clive 


> 
> >> Think about how much motor/pump it takes to do 100 GPM....
> >> (I'm guageing this on the 180 GPM Stewartcomponents mentions
> >> at 9,000 rpm).
> >> You might need 10-15 at idle..
> >> Or am I missing something here
> >> Bruce
> >
> >no pressure head
> >it just moves the stuff around
> >probably a lot of power is not required
> >maybe 1-2 HP
> >Clive
> >> >But, isn't it inefficient to spin all those things at engine RPM rather
> >> >than a constant RPM?  Seems like a pump/compressor that has to work over
> >> >a 10:1 input speed ratio wouldn't be as efficient as one designed to
> >> >work at a constant RPM.  Like A/C, and esp power steering.  If those
> >> >were designed to run w/electric drive at constant RPM maybe they'd be
> >> >more efficient.  Especially if you had a dual voltage alternator and ran
> >> >the accessories at 100V 3phase.  maybe?
> >> >--steve
> 
>