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Originally Posted by braverichard
Strictly speaking Mathematically, it should be doing 70mph at 2,583 rpm with the 2.48 rear end. That disregards other factors such as wind resistance, tire resistance, etc., but you get the idea.
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I'm sorry, but I don't think that things like wind resistance or tire rolling resistance have any affect on how many rpm's the engine is turning at a given speed. It's pretty much a mechanical linkage, if the engine is spinning at 2,583 rpm's the car will be going 70 mph irregardless of wind resistance or rolling resistance. What the wind resistance and rolling resistance will affect is how much fuel the engine is consuming to get to and maintain 2,583 rpm. Or, I'm wrong
