I ran my V6 for a full year without an electric fan, including 70 mph on the Interstate and only had problems when I got caught in minor in-town traffic jams. And I live in Florida. But I had removed the Tstat prior and I drive conservatively. I know it's a different situation, but I believe that as long as the water is moving through the system at a reasonable rate, that the change in radiator effectiveness will compensate for increased speed. But I would still like a cockpit switch that doubles the voltage as needed.
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