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Calibration Constant

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Old Feb 17, 2010 | 07:18 PM
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Calibration Constant
I just had to change the calibration constant for the computer in my 92 F150. I am sure the calibration constant has something to do with the odometer and how accurate it logs miles, but does the calibration constant also change the speed displayed on the speedometer while driving?

I just set it for my specific (bigger than stock) tire size so I am hoping this will make things accurate.

Thanks.
 
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Old Feb 17, 2010 | 07:49 PM
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Yes it will also change the speed displayed on the speedometer while driving.
 
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Old Feb 17, 2010 | 07:52 PM
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Well dammit, you know what that means? First I gotta find a certified police radar unit and test it out (DAMMIT!). Then I'll have to test it out for real on another truck (DAMMIT AGAIN!!)

Thanks for the info
 
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Old Feb 17, 2010 | 08:28 PM
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there are certified police radar units all over the place. problem is, the price to use them is kinda high (if you know what I mean).
 
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Old Feb 17, 2010 | 08:33 PM
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I just ran a mile at 60 mph and timed it with a stop watch, took 60 seconds, so its calibrated right..
 
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Old Feb 17, 2010 | 08:54 PM
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might be better to set your trip odometer at a highway mile marker, go ten miles and look for a difference between the markers and your odometer.
 
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Old Feb 17, 2010 | 09:25 PM
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GPS is pretty accurate ..
 
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Old Feb 17, 2010 | 09:45 PM
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Yes.. use a GPS.
 
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