Electric water pumps (was) alt charging cont sw

[Bruce Plecan]

-----Original Message-----
From: steve ravet <Steve.Ravet at arm.com>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Friday, March 12, 1999 2:50 PM
Subject: Re: Electric water pumps (was) alt charging cont sw

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


>>
>> I have pondered the us of electric water pumps and I believe that they
would
>> be beneficial in many ways:
>>
>> First no thermostat would be needed, when the engine get's to operating
temp
>> the pump would turn on..
>
>The pump has to run all the time, you don't want water sitting still
>inside the block.  It'll boil away from the cylinder walls before it
>even gets warm wherever your temp sensor is.  When the thermostat is
>closed on a normal engine there is still water flowing through the
>engine, either out thru the heater core and back in, or through a bypass
>in the water pump or something.
>
>>
>> Second the pump can run at varying speeds, while light cruising the pump
speed
>> would be slower than at full steam, saving fuel..
>
>makes sense.
>
>>
>> Thrid the engine could theoretically warm up quicker as there would be no
leak
>> past a closed thermostat and coolant wouldn't be circulating through a
cold
>> engine...
>
>see above...
>
>>
>> Fourth reverse flow coolant systems could be retorfitted easily just by
>> reversing the current to the pump, no special reverse flow pump impellers
>> would be needed...
>
>isnt' there more to reverse flow than just turning the pump backwards?
>reverse rotation water pumps have been around since they came up with
>serpentine belt drives, but they still made some weird cam driven pump
>for the reverse flow LT1.
>
>--steve
>
>
>>
>> Scott
>
>--
>Steve Ravet
>steve.ravet at arm.com
>Advanced Risc Machines, Inc.
>www.arm.com
>