Craig et al,
I think the idea of slowing the flow to help cooling may have come from the
necessity in many engines to restrict the flow slightly after the radiator
to keep it full-- this is done by the mechanical thermostat or a holed steel
disk (used in racing mostly.) If the radiator is full, the heat exchange
surface area is maximized. Many engines will run hotter without a thermostat.
Conventional heat exchange relationships should hold even for an
unconventional car like the Alpine 260 or Tiger. It depends on the
temperature difference (air-water), the surface area, and the movement of
the two media.
just my 2 ngwees worth (thats about 0.0007 US cents so not worth much really.)
derek
At 05:48 PM 1/19/00 -0800, Craig Wright wrote:
>Bob, Steve, et al:
>
>Being an engineer, I have this deep seated need to understand the basic physics
>behind the various hints, wife tales, tips etc. But, this one about
"slowing the
>flow for cooler running engines" completely baffles me. The wide spread
accepted
>explanation is that the water has to remain in the radiator long enough to
loose
>the heat. To quote a well respected member of this list, "goose poop". That
>explanation implies that heat has inertia, and we know that it doesn't. The tip
>that slowing the water flow is pervasive enough that there must be some
truth to
>it, only the explanation is incorrect. Can anyone shed some light on this
from a
>physics point of view??
>If you don't want to re-kindle an old argument, feel free to e-mail me direct.
>
>Baffled in San Diego (although me water pump isn't),
>
>Craig Wright
>
>
>Bob Palmer wrote:
>
>> Armand,
>>
>> I took a quick look at this link. These guys aren't quite as extreme in the
>> B.S. as Edelbrock and the other higher price aftermarket water pump guys we
>> discussed a couple of years ago - but they don't charge quite as much
>> either. Too bad they don't show a picture of the impeller design; at least
>> I didn't see one. Is it stamped sheet metal or a fancy shaped cast one? I'd
>> stick with a Ford Motorsports HiPo or similar (like the one McCleod has).
>> But then, you already know what I think about this subject. ;-) Or we can
>> take Chris' advice and just loosen the old fan belt a little.
>>
>> Bob
>>
>> At 11:40 AM 1/18/00 -0800, Armand & Lorie Ritchie wrote:
>> >Well gang I've been net surfing again. Actually I saw this add in a
>> >Mustang publication about "Flow Kooler" water pumps. They claim their high
>> >flow water pumps can hold engine temp.down 30 degrees while "cruising" and
>> >doubles water flow at idle. They have a web site which I just checked out
>> >and the price for a 260 water pump was $94.67. 289 shows $94.48. They
>> >claim to have 65,000 satisfied customers. So Anyway I thought I would pass
>> >on this info in case some ones wants to try it out. Might help out some
>> >of your "hot" tigers.
>> >
>> >www.flowkooler.com
>> >
>> >PS their in San Luis Obispo Calif.
>> >
>> >regards
>> >Armand
>> >
>> >ritchie@mcn.org
>> >Armand & Lorie Ritchie
>> >
>>
>> Robert L. Palmer
>> UCSD, Dept. of AMES
>> 619-822-1037 (o)
>> 760-599-9927 (h)
>> rpalmer@ucsd.edu
>> rpalmer@cts.com
>
>
>
Derek White
Zikomo Brewing Company
Box 31730, Lusaka, Zambia
Tel:260 1 286580/85
Cell: 260 1 702694
Fax: 260 1 262810
Life is Short, Drink Real Beer!
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