Thread: Gear ratio preference with overdrive
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Old 12-10-2025, 10:26 PM
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Bill Hanlon Bill Hanlon is offline
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Join Date: Feb 2005
Location: Fredericksburg, TX
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Quote:
Originally Posted by kpbrown31 View Post
I'm running aftermarket 17" wheels. If I remember the tire size correctly, they are about 27.13" tall.
Just multiply each MPH value I posted by 1.043461538461538 to figure speed at the same RPM.

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My Pontiac is a '57 GMC with its original 347" Pontiac V8 and dual-range Hydra-Matic.
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