I had similar symptoms that about drove me batty.  The engine simply acted as if it were too rich at low rpms and the secondaries were on below the point they should have been. If I leaned it out enough to cure this problem, the high end would be too lean.

 This WILL happen IF the pressure sensor is not seeing manifold pressure.  In my case, I though I had pushed the manifold hoses on the barbs of the sensors but in reality had apparently shoved them between some board components.

Ed;

I had verified early on that the connections are securely in place.  The MAP readout on the EM2 is coming from the data feed from the EC2, so if the EM2 says 13” then ‘presumably’ the EC2 is using 13”.

I have not asked but presume you have tried the "B" controller.  In my case, it made no difference because neither pressure sensor were sensing manifold pressure.  But, if one is  connected then switch controllers should make a difference (if this is the problem).

I have not yet tried controller B.  I believe it is still all set to default settings.  During the relatively brief runs so far I have stayed with controller A because I made changes in timing, injector flow rates, mixture balance between rotors, and the mixture correction table, during the dyno runs.  I don’t want to abandon that as it was one of the main features of that test program – get all that stuff out of the way before I got it on the airplane.

As Rusty suggested; “however painful”, I’m going to have to first do more calibration work on the EM2 so I can believe what I’m reading.  And, I may have to go back to ‘default’ on all the injector parameters, and start over.  I have to have a reliable O2 sensor readout, and I may try ‘pneumatic filter’ on the MAP input.

Al

Ed

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC