Ed Anderson makes a device that makes it much easier to
understand and tune Tracy's system.
http://www.andersonee.com

Here is a screen capture from Ed's Anderson's manual with a few
comments by me. As I use this to tune the RV4 rotary
I will have more comments I am sure.
As far as I can tell there is no need for Tracy's PCM
which is a good thing as where mine is mounted (down in front
of the stick) I cannot read the tiny mode switch number.

Tracy's instructions for tuning and using the PCM to tune
are very difficult for me to comprehend and learn. It is
a very complex procedure.

Dave Leonard also prefers this device for tuning.

Ed Carver and I had an extensive conversation about this
today at the hangar relative to the Megasquirt which is much
easier to tune due to the PC note book interface.
Ed Carver will be using the Megasquirt units.

Henry Nee came up with the ultimate idea and that is to store
the map in a spread sheet and download it into the EFI
system. You then use the spread sheet software to edit
the mixture map. You can then share it and save many different
versions.

If you want to test the system on the ground you can use
a shorter wood club prop to allow the engine to rev to max RPM
you are likely to see in the air.

Paul Lamar

I have Ed's device.  He's a super nice guy and went out of his way helping
me get it hooked up properly.

Jay