Re: What is average highway speed for the model a?
Robert: I have a 1930 deluxe coupe that is fully stock. Model A engines were designed to develop 40 HP at 2200 RPM. That translates to 48 MPH with 19" wheels and 4.75-5.00/19 tires with the stock rear-end gear ratio. Off the top of my head I think the ratio is 3.78 to 1. Anyway I installed a tachometer to check this out and at 2200 RPM the GPS registered exactly 48 MPH. I find that my A runs very smooth and happy at this speed. I also find that it will run smooth up to 55 mph. This translates to just over 2500 RPM and I do not believe this extra speed is in anyway detrimental to the engine. Lugging the A is the worst thing for the Crank bearings. Keep those RPM's up.
Love my A,
Steve
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