03-13-2010, 08:21 PM
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CC Member
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Join Date: May 2006
Location: St. Louisville,
Oh
Cobra Make, Engine: A&C 67 427 cobra SB
Posts: 2,445
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Not Ranked
In my car at 70 mph the wind is so loud, I would have to have the engine up to at least 3000 to hear it. At 55 mph, the wind will make my ears ring if I drive very long. I pretty much wear ear pluggs all the time, unless it is a short hop or in town.
I never drove a FE cobra. I would expect a big inch FE would have enough torque to not need a low gear ratio. I think I would still go with the .82 5th and then drop the rear gear ratio to get the desired rpm, if needed.
My small block doesn't get too load until above 2500 rpm and the cam does not like running below 2000. To be honest, if the engine had a milder cam, the .64 would be more usefull to me. So depending on your build you could be happy with the .64 gear. It sill sounds like you skipped a gear, when you shift into it. I think you need to look at the expected torque curve for your engine and make sure its going to run well for you. Measure twice and cut once.
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