Quote Originally Posted by Spudspec View Post
Dont forget guys that your tyres will make the "actual speed" differ. the display will be out from car to car, I know ours is slower than actual but ther can be upto 10% difference. also dont forget that if the speed sensor is on the gearbox and everyone has the same gearbox, it may be a calibration issue.
just a thought.
Indeed...

With my original wheels my Dashawk indicated speed was ~3KMh faster than my GPS speed, while my speedo was ~7KMh faster.

With my new wheels my dashhawk and GPS speed are basically identical, with he speedo being ~5KMh faster.

Chris.