Any well stocked computer or electronics should have cable with various
#s of conductors all of which are color coded. Sizes vary from 16
ga up.
Alternately jameco and All Electronics have some sizes. Another source
is Digi Key.

c smale

One would think so but I am in "Fry's and they have a limited
selection.

Paul Lamar

Paul,
Try this link Diy-Autotune have colour coded wires with
name every 6" 20 gauge wire.


http://www.diyautotune.com/catalog/megasquirt-3x-wiring-bundle-1239-long-p-452.html

I have used this bundle, wireing a dual efi setup, at least one
does not
have to remember what colour wire it is. They have a wide range of efi
style connectors, some I have never seen.
John Burey

Thanks.

Paul Lamar

The printing is confusing as it is Megasquirt language and
not Tracy EC2. I also can't tell from the web site exactly
how many 12 foot wires you actually get for $50. Do you
get 37?

In any event I found something on DigiKey that will work well.
12 wires 22 gage solid color coded in a vinyl jacket. I can sell this
for a
buck fifty cash a foot 10 foot minimum plus $5 flat rate mailing to
all you people wiring the EC2 and the EC3. This will be the EC to PCM
harness only.
It is larger than the RS232 cable so it is easier to work with.
This is a favor. I am not getting rich let alone a profit. It is
just that I have to buy 100 feet. When that is gone it is gone.

All the rest of the harnesses can be made up from single strands in a
split jacket.

I am working on a break out PC board from the EC2 37 pin
D sub min that will group all the wires together neatly for each
harness.
It will also pickup the ground stud. It will have cable or jacket
strain relief for each harness. It lies flat parallel with
the top cover of the EC2 and is smaller than the off the shelf
break out boards shown in this jpg. I am not happy with
the wires going in all directions at the same time as shown.

BTW I have not seen any bare stranded copper wires in this
size for years. In fact I can't recall seeing any ever:)
Just about all stranded wire is tin plated as far as I can
tell.

Paul Lamar

Hi Paul, I would worry about using a breakout board, if that is what
the picture shows, because wires are very prone to breaking under
vibration when screwed down (even with soldered ends), if one was to use
this type of connector, I would use the crimp-on pins then put under the
screws. the Diyautotune cable bundle is 12 ft long by I think 37 wires,
I did not use all of them because I dont have knock sensors, nitrous
injection, idle speed control, ect. ect.
John Burey

Well that is why I am adding strain relief. I see no difference
in clamp and crimp. NASA does not do solder any more. All crimp.
Robin has a cute blond A&P Space Shuttle cockpit certified friend that
teaches wiring at Sun & Fun. Her name is Marsha Buckingham.
Look her up in the workshop areas at Sun & Fun and attend.

I just found some bare copper wire coming out of an injector
plug :) Where do I find some injector plugs with tinned
plated copper wires pig tails? Just kidding.

Paul Lamar


I doubt NASA uses many screw down connectors.
I thought you were using the BO board as a temp test thing there's no
way I would put that in a plane, besides the fact it would not work in
my install, because of clearance issues.
brian gochnauer

The modern screw down terminal strip was invented after the space
shuttle was designed.

That board you see is not the final design. You will see the final
design next week. It will add little to the size of the EC2 or EC3.,
I would do a 3D but people can wait to see the part.
Then you can decide if you want to put it in your airplane or not.

Paul Lamar