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#13
04-10-2020, 03:38 PM
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You should be able to adjust it while the car is parked. Hook up a known good tach along with this one and adjust until they match at different RPMs. I don’t understand why you would have to tell them what your redline is. A 7k versus a 8k tach certainly makes a difference but the redline does not make a difference.
Jason 
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