Thread: Need some feedback on overdrive gear ratios
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Old 04-21-2014, 12:39 PM
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Bill D Bill D is offline
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Join Date: Jul 2006
Location: Redding, CA
Cobra Make, Engine: FFR chassis and suspension, Mr. Bruce 289 FIA body
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Default Need some feedback on overdrive gear ratios
Engine: 331
Est hp/torque: 450/400
Rear gearing: 4.10:1
Cam power range: 2500-6800

Trying to decide between .63 and .73

Using an online calculator, at 70 mph and the .63 5th gear, the engine will spin 2267 RPM. With the .73 5th gear, the engine will spin 2627 RPM.

Any thoughts on which one would be better suited? I'm leaning towards the . 63 as it's less wear and tear on the engine for long cruises.

Thanks
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