Steve's address is sboese@uwyo.edu

 You don't need to build anything to use it.  You need to connect your
 PC RS-232 interface to the signal in and out pins on the EC2, plus the
 +5V pin ground pin.  Steve makes the connections with a triple
 connector that he plugs in between the EC2 and the Cable.  It would be
 fairly easy to add the wires needed right in the EC2 cable.  It would
 conflict with use of the EM2.

 You do need to buy a converter to change the 5V ASCII signals to
 RS-232 levels.  I also found a converter that accepts 5V signals and
 converts it to directly to an RS-232 port by plugging into a USB port.

 The program is a compiled NSBASIC program that runs as an exe under
 Windows.  I haven't used it yet since my EC2 isn't operational, but the
 program seems to run fine.

 Bob W.

From what Bob is saying and from what I am gathering from other sources
the way Steve Bose's system works is this. I think.

Tracy has three computers in effect. The first is the primary computer
and the second is a back up. Call those the EC2 A and B. The third computer
is the engine parameter monitoring computer mounted on the instrument panel
with a display. We will call that one the EM2 for now. I suspect the primary
computer EC2 A communicates bi directionally with the  EM2. I am not totally
sure about the bi directional part yet.

Steve's equipment intercepts the data and sends it to a web book
ideally so it can be recorded. What ever shows up on Tracy's EM2 can be captured
and recorded I think. Pretty stright forward. Tracy's serial hard ware uses
zero and five volts. Most RS232 computer serial interfaces use zero to 12 volts
to reduce sensitivity to noise. Unfortunately RS232 interfaces are disappearing
from note books and web books being replaced by USB serial interfaces. I am not sure
what voltage range USB uses but I guess zero to five volts... the same as Tracy
is using. So far I have not seen a schematic of Steve's interface. This highly
desireable system would be needed for those people with an EM2.

Now from the looks of this screen capture Tracy has added that feature to
the EM3 at extra cost of $300 for a total of $938. Instead of a note
book or web book  the data is stored on a USB stick every second.

Here is a list of what is displayed and recorded as far as I can tell.

RPM     
Coolant pressure
Oil pressure    
Air/Fuel Mixture
Oil Temp    
% of power
Coolant Temp    
Inlet Air Temp
System Voltage    
Horsepower based on fuel flow and [assumed] BSFC
Bar graph display (in addition to digital readout) on select functions
EGTs (up to 8) auto display highest or all    
CHTs (up to 8) auto display highest or all
Unused CHT or EGT channels can be used for general purpose temperature measurement

Performance - Air - General Data
Outside Air Temperature (OAT)     
Flight Timer
Oil Hours Timer     
Hobbs Meter
General Purpose Timer (standard)

Fuel Management
Fuel Flow in GPH (standard on efi engines.
Flowscan sensor fuel flow is optional)    
Fuel Pressure (standard)
Total Fuel Used (or remaining) (standard)    
Fuel Level - right and left (standard)

Optional (Additional Cost) Features
Flowscan sensor fuel flow     
Pressure Altitude (up to 32,000)
Airspeed (TAS)     
Vertical Speed (VSI)
Manifold Pressure     

All this is very similar to OBD II installed on all cars made currently.
It is not a system where you can use the note book computer to set
the mixture table numbers like is possible with Megasquirt and many other after
market EFI systems unfortunately. However it is still highly desirable
and I do recommend it if you can afford it.

What I have in mind is more basic and what is recorded is the actual pulse
width of the injectors as a function of RPM and manifold air pressure
for trouble shooting purposes. Also the exact time when the injectors are fired
relative to the e-shaft position can be determined. The data can be sampled
thousands of times per second instead of only every second. It will also
work with ANY EFI system. EC1, EC2 or EC3 or other brands it matters not.

I am mostly guessing here so if any of you see any errors please let me know.

Paul Lamar