Quote:
Originally Posted by throwback
I have a 1936 Ford 5 window coupe. I looked at the stamping on the banjo. It looks like 9-37 or 4:11 ratio. I feel like the max comfortable speed on the setup is 50-55 mph. What speed could I get from 3.78 gear ratio or other gear ratio if I am trying get more speed for hiway driving?
Thanks for replies!
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You can run the numbers and get a fairly good estimate. What people are normally concerned about is the engine rpms.
rpms = (axle ratio x mph x 336) / tire diameter
To determine the mph at a given rpm just rearrange the equation.
mph = (rpm x tire diameter) / (axle ratio x 336)