which is more accurate? scanguage or speedometer - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 06-24-2010
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which is more accurate? scanguage or speedometer

my scanguage reads 2 mph lower then the speedometer on the truck. and it is calibrated correctly. which do i trust?
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Old 06-24-2010
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hmm, im not sure. 2MPH off isnt really that much, your speedo was probably off that much from the factory. if you have a GPS id check them with that.
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Old 06-24-2010
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I'd GPS verify and then go from there
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Old 06-24-2010
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Get a GPS like a Garmin. set the cruise at 70 on the garmin. then adjust the speedo on the scangauge to match the Garmin with the +- settings
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Old 06-24-2010
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If you have an iphone, there is an app that uses the accelerometer to measure speed.
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Old 06-24-2010
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Quote:
Originally Posted by Redneckstone View Post
Get a GPS like a Garmin. set the cruise at 70 on the garmin. then adjust the speedo on the scangauge to match the Garmin with the +- settings
That's the way I did mine. Rechecked it a while later and it's still good.
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Old 06-24-2010
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speedo's come from the factory a little slow so i would never trust that as a source of your "true" speed
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Old 06-24-2010
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Speedo is purposely slow to prevent liability issues on the oems part. scangauge is correct.
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Old 06-24-2010
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I set the factory speedometer to be accurate according to gps, using my programmer.
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