Subject: PC interface for Tracy's EFI
From: Rotary Engine
Date: 8/14/2009, 12:11 PM
To: AAA Put this in the To box

 Would anybody like to store the "tune" on a PC
 and be able to look at a graphic of the whole table as it changed
 with RPM and MAP? In other words a graphic 3D over view
 of the fuel injector table. Great for understanding what is
 going on.

 Handy for trouble shooting when the injectors are staged.

 Paul Lamar

Sure i am interested

Jean Prudhomme

I too would love this.  I think someone at the Texas Rotary Roundup a
couple of months ago had something he was using, but it was not yet
ready for "prime time".  There MAY have been some discussion about
making it available.  I know I would like it especially IF it were not
outside my electronic skill set to be able to use.  IIRC, he had a
serial interface cable that would link to the PC and then some software
which would provide data.

I understand Tracy's desire to be able to program everything w/o a PC,
especially in the air AND based on when it was first developed, however,
with $200.00 netbook computers and so much initial development on the
ground, I would love to be able to "see" more of what I am doing via a
netbook/notebook 'puter.  FWIW.

All the best,

Chris Barber
Houston
wings back on my Velo hoping to restart after my EC2's round robin to
Tracy <g


Paul,

You are correct, Ed's instrument is not an addition to Tracy's it is
INSTEAD of.  IIRC, he developed it when Tracy did not have one.  I spoke
to Ed about it at the Texas Roundup and asked about using it too, but he
assured me it was not needed if I had Tracy's unit.  It is more
colorful, but is redundant.

The other unit I was speaking of is different and works thorough a
serial interface to a PC and I believe allows data logging from the EC2
(which is an add on in the newer EC3) and lets you see more/most/all (?)
of the MAP table.

Chris Barber
Houston

Do you have a web site address on it?

Paul Lamar


I'm in the tuning stage of running my engine up, with Tracy's controller
and monitor, and with a 2.85/1 redrive. I was wondering what I should
shoot for as an idle speed- what are others with similar setups using
to keep from getting chatter in the gearbox?

Brian Trubee


Keep the idle speed over 1800 to go easy on the gear box.
2000 would not hurt the prop is only turning 700 RPM which
is about the idle speed of a Lycoming.

Paul Lamar



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