Tracy and all,

Looking back at the data I was using when thinking about my "staging bog", I realize that the manifold pressures I am looking at are values I calculate from the EC2 data.  My conversion to units of inches Hg may not be correct.  Either my EC2 manifold pressure sensor may have changed calibration or I may have never had this conversion correct to begin with.  I have only one program to do this and may not have it right.  How Tracy keeps track of all the versions of EC's is beyond me.

In any case, I can NOT say with certainty that my EC2 is internally inconsistent as I stated in my previous message.  I apologize if this has caused you to waste any of your valuable time and energy over this.

The reason I am concerned with staging more than many others might be is that at the ground level density altitudes of my home airport, the maximum manifold pressure I see is about 23 inches and of course it gradually drops off from there as I climb.  This results in staging taking place during critical flight regimes.  Encountering an extended "bog" right after take off is not my idea of fun.  If I cannot get the staging to work well using mode 6, I am considering David Leonard's suggestion of moving the staging point to a higher manifold pressure where I will not normally encounter it.  In my case this is need not be much of a change.  The manual indicates that some modes are active only when the engine is running.  Is this the case with mode 7?  I'm trying to make sure I can set the staging point with a pressure source other than the engine.

This does generate the potential for my next trip to lower altitudes to be memorable.  I just have to remember that this is venturing into unknown territory again and that full throttle operation may not be reliable until tuning at the higher power settings accessible at lower altitudes has been accomplished.

Again, my apologies to especially to Tracy and also the rest of you.

Steve Boese