Frank Davis wrote:

Hi Paul,

Great work!  I concur that Barry is "bang on" (as an Irish
CFI says).

I think that the order of the displayed items should be in
descending
order of importance in the traditional occidental manner,
starting in the
upper left and going to the right.  I'm not sure that MPG
would be my
third choice in order of importance.  Perhaps FF. (It's nice
to know fuel
is flowing.)  Also, I don't understand why TD, TA, and SF
are important
to me when flying.  The less clutter in a display, the
better, especially
with older eyes.

Those are important because the system is in-the-air programmable.
(The display itself will not be but the EFI computer is.)
There are two complete EFI systems. One can be programed while the engine is running
on the other. You then switch to the newly programed unit and let the
engine run on it to see how  well it works. If not switch back. This is the way 
Tracy designed it and it it is not optional. It is also working very well. This 
allows you to taylor the fuel supply and ignition  map to your airplane and 
prop combination. It also provides a back up computer if one fails.

AS I was away for a week, I only scanned the messages on
this subject. Was the inclusion of oil and coolant
temperature and pressure rejected?  These are high on my
priority list.

Yes they were rejected  because there are no oil or coolant sensors supplied 
with the EFI computers. You will have to provide those along with gages. 

Intake manifold
air temperature IS displayed because there is a sensor for this used by the
EFI computers. 

BTW this is an extremely important number for turbo engines.
the intake air temperature mainly controls whether the engine will detonate
or not. WWII P38 pilots were trained to control the boost and power with intake
air temperature. PL

Cheers, Frank

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