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Old 08-05-2008, 03:33 AM
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I've got a an 0.68 for 5th gear and a 3:73 ratio rear end. With 15 inch tires and a very accurate speedometer and tach, and I'm doing 100 MPH (not 65) at 3000 RPM.

As many have said before me .... "something is wrong".

Here is a good calculator ...

http://www.cobranet.com/rpmmph.html
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