Originally Posted by
MikeB52
On old smith gauges it’s a matter of pushing the car a measured distance, counting the cable rotations while you do, figure the math out as cable rotations per kilometer, do the math on what your car’s cable does, then send the speedo out, with that info to an instrumentation shop that changes the internal gearing to match your car..
Should have been done when they installed the triumph gauges in the mg, and certainly after the new rear diff and tyre upgrade. So I will wait till the proper tyres for the car are installed and revisit the math.
I may have mine sent away over the off season, depending on how off it is then.
Rain for the next day or so, so no driving, all shop work. Focus on the weather gear now.
Cheers.