just wanting to see if anyone has a non working or cheap standard coupe tacho kicking around. wanting to see if i can fit the internals from an autometer or similar tacho into the stock one so i can keep that stock look but have an actually accurate tacho

mine seems to be accurate. Should I be worried?

The std tacho is already up to the task, I take my tachs to an instrument repairer and have them re-calibrated and balanced. Because the RPM needle sweep is exponential and not linear, it is ideal to have the tach balanced and calibrated at say 6000 rpm [calibrate at a higher deflection to reduce the amount of error]. Having the needle balanced [the counterweight] assisted with free movement of the needle and not relying on additional voltage [the tach works on inductance loop] to move it. Also reduces the amount of error and also improves the reaction time for the needle to move.

Are you after a tach that represents more than 8000 RPM? The std tach cct can be modified to represent just about any RPM range over a 270 degree sweep.


A couple of years back I made a few replica 10000 RPM Nismo tachs from the std tach as a base. Still working on fabbing up the redline needle.

i found the stock one i used to have in my car was pretty slow compared to the autometer one that i had in there. had them both in at the same time for a little bit. there was almost a 1000rpm lag in the stock one if you were revving 1st and second gear out when driving.

also need it for the CA so the induction loop probaby wont do the job

found a place that will put their own unit in the stock tacho and then calibrate it to suit