Richard,
Your cooling fan, whether stock, electric, or both, only are effective
at low speeds - say below 30 mph.
At higher speeds the total flow coming through the radiator from road
speed far exceeds the mass flow of the fans. That is why some cars
come with clutches that disengage the fan at speed, and it is good idea
to turn off the electric fan. Thermostatically controlled fans are a
bad idea, anyway, as the sensor rubbing the radiator tubes can wear them
thin.
Fan drag actually interferes with air flow at speed.
210 F is not a bad temperature, and remember you are generating more
heat producing horsepower moving your car through the head wind, which
generates more heat.
Steve
Richard wrote:
>Ok guys ....here's another engine temp question.
>
>I have 67 MKII....all stock. If you are driving in town in stop and go
>traffic and the temp gauge stays at around 200. Why when driven on the open
>road at 65 mph and 3000 rpm does the temp rise to over 212? Then when back in
>slower in town driving with the engine at around 2000 rpm the temp starts to
>drop back to around 200.
>
>I have always assumed that faster is better for cooling. Why wouldn't the
>increase in air flow thru the radiator at the higher speed compensate for the
>increase in engine temp and keep the temp at around 200. Would this indicate
>that the water pump is not pushing enough water thru the system to cool the
>engine?
>
>Thanks
>Richard
>
--
___
Steve Laifman
Editor - TigersUnited.com
|