Originally Posted by
Frosty
I think that tyre size wouldn't make any difference because you are comparing the engine revs to the final drive at the back of the gear box. It would work regardless of wheel or tyre size. Wouldn't work with a 5 speed ( over drive more tha 1 to1 final drive) wouldn't work if the cog on the end of the speedo cable was incorrect (speedo would be wrong to, I took the GPS to check that) and I think the final drive of a auto might be less than 1 to 1. Still think your a genius Beachy because I've been trying to work out my Diff ratio for a while. Was hopping that HK might give us a technical reason why this works.
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