Speaking of temporary gauges, the tach output of the AC-2 is supposed to be 12 pulses per revolution.  I’m assuming that’s something that’s used only for the EIS, and not for normal tachs.  Do you just tap into a fuel injection, or ignition lead for normal tach pulses? 

Sorry to talk to myself here, but I think I just realized that I don’t need to hook up a temporary tach.  I have an optical tach, and should be able to read the prop RPM from the cockpit (I did this to verify the tach on my previous RV-8).  I’ll just have to do the math.  I’m still a little curious where you hook up a regular tach to the engine. 

Rusty