It settles down above say 2k revs. Not sure why it's jumpy, it is a custom 555 timer tacho PCB that I made in there after all. Maybe I could add some capacitor/filtering arrangement to the input signal to smooth it I just couldn't be bothered. Since I've essentially got two ignition coils the tacho is only using one coil as an input signal so 1/2 the number of pulses compared to a single coil ignition, may have something to do with it.
Brings back memories
You’ve got a jumpy tacho there mate! Does it settle down?
Your interior is mint too - looks VERY fresh (and so it should with the work you’ve done!)
It settles down above say 2k revs. Not sure why it's jumpy, it is a custom 555 timer tacho PCB that I made in there after all. Maybe I could add some capacitor/filtering arrangement to the input signal to smooth it I just couldn't be bothered. Since I've essentially got two ignition coils the tacho is only using one coil as an input signal so 1/2 the number of pulses compared to a single coil ignition, may have something to do with it.
Nothing about the twin carbs?