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Old 10-28-2020, 03:26 PM   #19
Tom Endy
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Join Date: May 2010
Location: Southern California
Posts: 3,122
Default 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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File Type: pdf 4-Tachometer.pdf (220.5 KB, 111 views)
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