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


Hi guys

Is anyone willing and able to share the serial data strings and command codes to and from Tracy's EC2?

Cheers

Steve Izett
Perth WA
Renesis 4 port EC2 EM3 RD1-C

Other than this not so far.

Displaying EC2 Data

Update - Feb 2005

Is it turns out the EC2 is not nearly as hard to tune as my earlier experiences
suggested.  In my case I had two major issues to resolve before I got my engine
running well.  The first problem was the firmware version in my EC2 was not
correct for the MAP sensors on the EC2 board.   RWS (aka Tracy) had made some
design changes in the hardware to use the same sensor for both turbo and non
turbo EC2's but my older unit had the  rarer  non turbo MAP sensors.  New
firmware resolved that problem.

My second problems was the position of where I sensed the manifold pressure.
My original install used an existing fitting on the base of the stock lower
intake manifold near the ports for rotor 1.  I wrongly assumed there would be
enough damping in the system that the EC2 would not be seeing the pulses in the
intake manifold but would sense an average manifold pressure.  How wrong I was,
the computer was seeing each pulse in the intake manifold cause one rotorto
run richer than the other.  Moving the sensing location to just behind the
throttle body resolved that issue.

So does that mean the EC2Params program was a waste of time?  Actually what I
found most useful with the program was being able to confirm all switchesand
engine controls were working correctly so I could eliminate a wiring problems
as a source of my grief.  If I were doing another EC2 installation I'd run
EC2Params to confirm the engine controls were all wired correctly before even
trying to start the engine for the 1st time.

I've added a link to the source code at the bottom of the page for those of you
who are interest in how to get data from the EC2.  The code shows all thesigns
of  a 1 day hack job so be warned it may not be all that pretty and certainly
not complete or bug free.



Perry



I found getting the correct air/fuel mixture table programmed into my EC2to be
a bit of a painful process. In my case I had Tracy's air/fuel mixture display
but no manifold pressure gauge. Tracy's tuning process has you step the
throttle incrementally through different manifold pressure settings approx 1?
at a time and save the optimal air/fuel mixture for each setting. Doing this
without a manifold pressure gauge means you are working somewhat by guessing.
My many attempts to get things right always resulting in getting a few throttle
settings where the engine would stumble. I found once there was a ?hole? in the
map table they were very hard to fix as the engine would oscillate above and
below the problem MAP pressure value and saving correct data where the problem
existed was hard to do. To help get a better idea what was going on I wrote a
simple program that parses and displays the runtime data getting sent outof
the EC2. Here's a look at the data I was able to pull out from the EC2 data
packet and display.






Unfortunately you can not plug the serial port of your laptop directly toyour
EC2 because a EC2 uses 5V CMOS logic levels not +/-12V as used by RS232 so you
are going to need to build a adapter circuit. I had few Maxim 232 line drivers
laying around so that is what I used. On the rainy day list is to actually make
a short run of PCB's so I can have a permanently mounted device in the airplane
but for tuning purposes the breadboard approach works well. It would costless
that $10.00 in parts to build the following. For those you who are not familiar
with electronics prototyping click here to see what a breadbread looks like,
they are available from any electronics supply store.

I've been working on a Pocket PC version as well with a plan to be able to use
this as a inflight fuel totalizer among other things but it's still a work in
progress.

Note: The PC version is developed to the state where it is functional enough to
be useful but there are several things like spinner controls, menus and the
setting dialog that do nothing. For me it was good enough to get the job done
as is so I'll probably not be doing much development on it until the Pocket PC
version is completed.

Important: This program requires EC2 firmaware that is dated Oct 2003 or newer.
To get order EC2 firmware updates contact Real Word Solutions


To download the current Windows version click here: EC2Params.exe

To download the source code (requires MSVC)  click here: EC2Params.zip

Note: Nov. 2010 - I while back I spoke to Ed Anderson who used some if this
code to help with his development of his fuel totalizer.  Glad it was some use
to someone - but he did mention the newer EC2 firmeware uses a high higher baud
rate - 38400 I believe he said.

http://www.jigsaw.com/scid34125463/perry_casson.xhtml?ver=5

https://msofs.mssociety.ca/2011bike/ManualDonation.aspx?PID=1257577&L=2&TS=1

http://www.troocorp.com/about-us/contact-troo

Perry Casson

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