Here is an old idea. I am thinking of making a new harness
 for the test engine. It is easier and quicker for me to
 do that than try to figure out what is wrong.

 Also it needs to be easier to do and better documented.
 We had one guy get so frustrated he ripped the rotary out and put
 in a Lycoming. He did a wonderful job on the installation up
 to that point. Real shame. It takes a highly skilled electronic
 technician to wire Tracy's EFI system and do it  well.

 I did not implement it at the time mainly because Bob White
 started making harnesses. Unfortunately Bob died of a heart attack
 about a year OK.


 I'll put the blinking lights on it so one can tell at a glance
 during started if anything is amiss.

 -------------------------------------------------------

 -------- Original Message --------
 Subject: Wiring Tracy EFI computer.
 Date: Sun, 09 Nov 2003 20:58:12 -0800
 From: ACRE <rotaryeng@earthlink.net
 Organization: ACRE

 I am just getting around to wiring Tracy EFI/IGN computer
 and I had an idea. Tracy uses a 37 pin D sub min male connector
 that is rather hard to attach tiny wires to unless you are real good with
 a tiny soldering iron or you have a special crimping tool.
 This is a job I was not looking forward too as my eyesight
 and hand coordination is not what it was when I was younger.

 I was driving home from the hangar tonight and had an idea.
 I have a whole bunch of these terminal strips left
 over from another project and I had the idea of making a small
 printed circuit board that would adapt a male 37 pin D sub min
 printed circuit board connector to these easy to use terminal strips.
 Merely strip the wire, insert it in the hole and tighten the screw.

 I am laying out the PC board and will order a bunch of mating male
 37 pin D sub min connectors to solder to the printed circuit adapter
 board. If anybody wants such an adapter let me
 know. Cost should be around $20 or $30.

 Paul Lamar
 Hello Paul,
 I'd be interested in the adapter.
 William Hagood
 Ok here is what the PC board will look like.
   The PC board will be about an inch and a half high.
 The two rows of green 18 position connectors will be
   numbered in a straight forward fashion.
 1 to 19 with 2 missing and 20 to 37 none missing.
   One advantage of this approach the green connector will
   accommodate larger gauge wire for ground and power.
 I suggest buying jacketed cable and there will be pictures of
   that as I wire this system. One jacket will go to the
   injectors and one to the coils. That should keep things
   real neat.
 What type of coils are you going to use William?
 Paul Lamar

 I've got the LS1 corvette coils.

  William Hagood
 --------------------------------------------------

  That is a good choice.

  What is the part number William?

  Do they look like this?

  Do you have Tracy EC2 for the RX8 CAS or the old 13B CAS?

  Paul Lamar


 Hello Paul,

 I have 52-1573 (carquest) coils imprinted with:

 12558948 08M10-0200.

 They match your photos on appearance.  I have Tracy's EC3-A1 dated
 November 8, 2010.

 William Hagood

 They are probably the same. Do you have an RX8 engine?

 Paul Lamar

This board will not fit the EC3! The EC3 has a smaller connector
for the EFI part of the system.

There is an error on Tracy's web site. The 37 pin connector is called
out while the EC3 has two smaller connectors. A step in the right
direction but not there yet IMHO :)

One D sub min connector is a 25 pin I suspect for the EFIS and one 15 pin
for the FI and Ignition I suspect. IMHO the 25 pin is OK for the EFIS  but the 15 pin (if it controls the FI) should be a positive lock round AN style connector which is easier to connect to. D-submin's are very low cost.
I have a bunch left over for sale. Scroll down to the bottom
of the front page of the web site.

I am building this board primarily for myself as I probably
(not sure yet) have 2 EC1's a and one EC2 to deal with :)

Paul Lamar