OEM Electric Water Pumps

[Mike Blakey]

This is a good pump, but quite expensive. A friend of mine has one on a car he 
races and yes it does reduce weight, runs at very low duty when the car is moving 
and provides good cooling.  I believe that Audi might be using an electric water 
pump but I'm unsure. Once the OEMs start to use them the price will drop to 
something reasonable.





turbotuneusltd at triad.rr.com on 01/10/2001 14:57:12
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Subject:	Re: OEM Electric Water Pumps

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http://www.daviescraig.com.au/      This is not OEM but I've had one on a
4.0l Ford Ranger pickup with air conditioning for almost a year. Has worked
fine and is a daily driver. It picked up 10 hp at the rear wheels on a
Dynojet at 5000 rpm changing the OEM water pump and clutch fan for the
Davies-Craig and an electric fan. Engine comes up to heat quicker but you
need another water pump for the heater circuit, which I see they are now
addressing.  Later, Mark
----- Original Message -----
From: "Greg Hermann" <bearbvd at mindspring.com>
To: <diy_efi at diy-efi.org>
Sent: Monday, October 01, 2001 11:00 AM
Subject: Re: OEM Electric Water Pumps


> At 8:10 AM 10/1/01, Stephen Webb wrote:
> >> I'm after an electric water pump for cooling. I know that there is an
> >>aftermarket
> >> pumps available, but the what OEM are using electric water pumps? I
read
> >>some
> >> months ago that Velco(?) now make one for OEM but I don't know what
> >>models it is
> >> fitted to.
> >
> >Is it possible that the OEM pumps you saw were "after run" pumps?  I know
> >that Volkswagen (on their VR6 engine) used "after run" electric pumps to
> >circulate coolant after the car was turned off.
>
> ------- They are relatively small
> >and would not support full load cooling needs, though.------
>
> Bingo. A belt drive water pump can absorb as much as two or three HP at
> high rpm.
>
> The point is that the water pump _NEEDS_ to do this in order to provide
> adequate coolant flow !
>
> Take a peek at the bulk and weight of a typical 3 or 5 HP electric motor,
> and decide whether you want this big and heavy an alternator in order to
> run a 100% duty cycle electric water pump! (And, don't forget that the
> motor for driving the pump will need to be about this large as well !!)
>
> Greg
>
>
> >
> >-Steve
>
>
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