dllubin
Don
I checked my speedometer calibration yesterday against a GPS and found that it reads about 5 mph low at 50 mph. I've never checked it against a GPS before as the last time it ran, a GPS cost thousands of dollars. Don't know if it has always read this high or not. One contributor is running 185-60/13 tires but that would only contribute a 2.8% decrease compare to the 145-82/13 tires the car came with from the factory. I'm seeing being about 10% off.
Are there any options on speedo cable gears, or calibration of the speedometer itself?
Are there any options on speedo cable gears, or calibration of the speedometer itself?