Re: What is a "reasonable" speed in a Model A for one to get "reasonable" engine life
I have always been of the opinion that a Model A was designed to run all day long at 45mph with the engine turning over at 2000 rpms (with a 378 ring & pinion). With an overdrive you can travel at a higher speed with the engine still turning over at a lower rate.
I have a 23% Ryan overdrive in my Victoria, I also have a tachometer. Attached is a study I did at various speeds.
Tom Endy
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