Water pump....questions

[haygood@aemail4u.com (Haygood)]

Scott wrote:
Assuming that the electric water pump and the stock version are equally
efficient and have the same frictional losses...

I'm no pump expert, and I don't want to be, but I don't think that a water =
pump made to keep your engine cool at engine idle speed while standing stil=
l on a 95=C2=B0 day can push the water as efficiently when your engine is a=
t 6500rpm as it can when it's at 1000rpm.   My point: I'd expect the electr=
ics to be more efficient and have lower fricitional losses, and no cavitati=
on at high rpms.=20=20

I've used the same EWP system on a race car that was only making about 70hp=
 (600cc with itty bitty restrictor), and the system seemed to work well, in=
stall well, and generally be a good thing.  I also like the idea of getting=
 rid of the mechanical thermostat since it is a big flow restrictor.

Scott, how are you dealing with removal of the stock water pump and fitting=
s in that area?

BH

--- "Scott F. Williams" <sfwilliams@comcast.net> wrote:
>Julie wrote:
>> Drive a generator from a belt, then drive a water pump
>> from that? Nope. The losses from friction etc would reduce
>> the effectiveness, double the weight and not gain any HP as
>> I can see.
>
>Julie, first of all how do you figure that the weight would be "doubled"?
>Secondly, why would there be any increased frictional losses? In this case
>the belt to the water pump is eliminated. Third, the electric water pump
>runs directly off the alternator; there's no additional generator added.
>
>Assuming that the electric water pump and the stock version are equally
>efficient and have the same frictional losses, the engine output gains from
>the electric version come from the ability to do less work when needed. You
>can review my previous post for that explanation.
>
>Word,
>--
>Scott F. Williams
>NJ Scirocco nut
>'99 Subaru Impreza 2.5 RS
>Mazda 323 GTX turbo "assaulted" vehicle
>Golf GTI 16v "rollycar"
>ClubVAC: "Roads found. Drivers wanted."
>
>
>
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