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Old 10-07-2020, 01:11 PM   #2
JSeery
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Join Date: Nov 2012
Location: Wichita KS
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Default Re: Overdrive Transmission in a 1952 F1

Just keep in mind it takes modifications to switch out the transmission, don't think it is a bolt-in.

You might run the numbers, the engine is capable of way more than 50-55 mph with a 3.92 rear axle.

MPH = (RPM x Tire Dia) / (Gear Ratio x 336) & RPM = (MPH x Gear Ratio X 336) / Tire Dia

So, for 29 inch dia tires and say 60 mph the engine rpm would be:

RPM = (60 x 3.92 x 336) / 29 = 2,725 rpm, not that high an rpm

With say a 30 inch tire: RPM = (60 x 3.92 x 336) / 30 =2,634 rpm

Or, for 65 mph : RPM = (65 x 3.92 x 336) / 30 = 2,854 rpm

You can play with the number this way and see what is what. Stock flatheads have max torque @ 2200 rpm and max hp @ 3700 rpm.

Last edited by JSeery; 10-07-2020 at 01:22 PM.
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