[350HP930]

Thanks for the info.

I am installing an 8:39 ring and pinion in the car and might need to do something simular.

The only problem is that I don't want the odometer to be out of synch so I was planning on puting a signal pulse multiplier/divider into the circuit instead.

Does anyone know whether this adjustment only calibrates the speedo or if it also adjusts the odometer circuit too?