04-17-2012, 04:47 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
I agree to check it against a measured mile first. Even with the supposedly correct gear they can only come close. One tooth higher or lower will account for the reading difference you are seeing. The calibration instructions were sent to your e-mail.
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