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Old 12-10-2009, 08:36 AM   #8 (permalink)
MechEngVT
Mechanical Engineer
 
Join Date: Jun 2008
Location: Richmond, VA
Posts: 190

The Truck - '02 Dodge Ram 1500 SLT Sport
90 day: 13.32 mpg (US)

The Van 2 - '06 Honda Odyssey EX
90 day: 20.56 mpg (US)

GoKart - '14 Hyundai Elantra GT base 6MT
90 day: 31.25 mpg (US)

Godzilla - '21 Ford F350 XL
90 day: 12.1 mpg (US)
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Quote:
Originally Posted by Old Tele man View Post
...would co$t more, but an electronic thermostat (controlled by ECU) would get the job done much better! (servo-mechanical flow control or electric pump control)

...it could hold the flow totally off until it's actually needed, and then only pump or pass just enough coolant to keep thermal equilibrium.
It's been a long time, but I remember pan-testing a thermostat on the stove. I seriously doubt you would be able to detect any cooling performance increase from a servo-actuated thermostat as I recall the spring thermostat nearly jumped out of the pan when it opened up, and they continuously adjust pretty well if temperature drops too low. They are fast-opening on warmup and maintain low enough flow to stay at their design temperature pretty well. An old, tried-and-true design not likely to be replaced until our vehicles no longer need liquid cooling systems.
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