Wondering if anyone can comment on the accuracy of 123 Ignition's dashboard gauge accuracy. Is the Bluetooth connection causing error?

When I'm at steady idle, my stock Tach reads about 50~100 rpm higher and at steady cruise (3000 rpm) my Tach reads about 200 rpm higher.

Also curious about amp, V, vacuum and oil temp gauges. Is the amp only for coil/ignition load?

I have always assumed my analog gauges were off.

Many timing lights have a built in tach which could be used to verify actual rpm.

The stock gauges on my engine read higher then the electronic gauges I have via Microsquirt. The tach is often off by 200 rpm at idle compared by what I'm seeing when I'm data logging. And given the ECU is getting engine speed from the crank, I'm believe that over the 50 year old analog gauge.

Zach