Originally Posted by
Turbosystems
The standard speedo is miles out any way so can't be any worse really lol
speedy cables can calibrate your std speedo any way
and it's hardly a big worry fitting a 3.7 diff as most people have messed the speedo up any way with 17's 18's and 19 inch wheels
The cosworth is still running a 1950's cable speedo ffs
I hear what you're saying. I'm still on standard 205/50x15s and standard diff ratio but my speedo isn't too far out according to different GPS apps/devices.
How much is it to source and change a 3.9 7.5" ratio ( 2wd car ) for a standard Cosworth diff as an aside?