cant get speedo correct
06-09-2012, 10:22 AM
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Staging Lane
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Join Date: Dec 2007
Location: hendersonville,tn
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cant get speedo correct im using hptuners and have the tire/gear @ 6.87 thats with nittont555 315/35/17 (tire diameter is 25.63 on nittos site)and a 3.73 gear. Its off by 1-2mph from about 40 to 60 then @ 80 its of by about 5mph. Im checking speed with two different gps devices at the same time.
