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**jocko** · 06-05-2018, 10:51 PM

Recommend once you make another change (or perhaps before you make a change..) that you use a GPS for speed and distance crosscheck rather than your buddy's vehicle or hi-way markers - this will be much more accurate. And, like you said, who knows if your buddy's vehicle is correct either. 7% off on the distance, even if calculated by highway markers, is a chunk though, so at least you know which direction you need to move.

06-05-2018, 10:51 PM	#5
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,937	Re: Getting my speedo to be more accurate Recommend once you make another change (or perhaps before you make a change..) that you use a GPS for speed and distance crosscheck rather than your buddy's vehicle or hi-way markers - this will be much more accurate. And, like you said, who knows if your buddy's vehicle is correct either. 7% off on the distance, even if calculated by highway markers, is a chunk though, so at least you know which direction you need to move.