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Really interesting, Vekke. It is broadly a little like an ICE at low load on a freeway: the radiator fan does not come on because aerodynamic pressure on the front of the car forces enough air through the radiator and the engine bay to cool the engine.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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