Calibrating Speedometer and Tachometer
How to calibrate your speedometer and tachometer:
Speedometer: compare with a GPS. Or, you can use the GPS app on a I phone.
Tachometer: Go to this site: http://www.precisionsite.com/auto-x/tools/
Put in the information for your car and you can compare your tach reading to the speedometer reading. The calculator assumes you have stock wheels and tires. Uncheck the (Fudge) box.
How to calibrate your speedometer and tachometer:
Speedometer: compare with a GPS. Or, you can use the GPS app on a I phone.
Tachometer: Go to this site: http://www.precisionsite.com/auto-x/tools/
Put in the information for your car and you can compare your tach reading to the speedometer reading. The calculator assumes you have stock wheels and tires. Uncheck the (Fudge) box.
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