I suspect the issue is not the Procal, as such, but the figure it feeds to the car. I measured my tyre circumference to feed in through the Aeroforce gauges, (since it works on that, in mm yet!) I have & then still had to tweak it a little based on GPS to get the speedo accurate.
For the record I used a measurement based on putting a chalk mark on the tyre & rolling the car back one rotation in the carport to get an accurate length to measure. It got the speedo pretty close to GPS but still needed a fine tune.
I haven't had any issues with the cruise control, but who knows what figure the computer really used for the tyre size...
__________________
Jeeps: Lego for grownups!
|