snips...

It is not that I attached to it. I have a couple. I
would rather do  the development so the spark will
work
with 3rd gen and RX8 engines. Also it is easier to
mount the
alternator on the side of the engine if there is no
CAS installed.

Are you referring to the LS1 type coil per plug
module.
Do you have a picture? Is this it?

Paul Lamar ...No rotor no motor.

Paul,

There is someone working on decoding the stock RX8
toothed wheel as well, so that issue may be taken care
of shortly.

The 4-pin module I refer to does not contain a coil.
All it does is interpret the VR signal from whatever
mag pickup you are using, and fires the coil at the
moment the tooth passes.  It predicts when the next
firing event is to take place, and starts charging the
coil ahead of time, current limiting to around 6-7
amps.

See attached pic.  W and G pins go to the VR sensor.
B and G go to the coil to be fired.  A single 4-pin
module could be used to fire a twin-post coil on the
leading side.  The same is usually not done on the
trailing side due to the chance of prematurely
igniting the mixture in the opposite chamber at
retarding spark angles.  I've seen others come up with
twin 4-pin modules for the trailing side, triggered
appropriately.

More details on the 4-pin here:
http://www.megasquirt.info/HEIgn.htm

That's why I went the EDIS route.  It is similar to
the GM 4-pin, but instead decodes a 36-1 wheel, and
provides two spark outputs, one for the front rotor
leading coil, the other for rear rotor leading coil.
A second EDIS module in parallel fires the other two
coils for trailing.  This setup could be installed on
any 2-rotor, with the addition of a toothed wheel and
VR sensor.

Roger.

Well then as I understand it these GM LS1 one-coil-per-plug
units do not have a problem with charging time and current
limiting. They fire when they are told  with a five volt
pulse and thats it. I could be wrong. These are the units most
of us have and most of us are using now. GM part # 12558948
If it takes some signal conditioning so be it.
If necessary I can set one up on the bench as I have a
pulse generator and 12 volt power supply with current
monitoring to verify.

Lets keep this simple and deal with only one issue at
a time. Too confusing otherwise. I am not considering
the extra code at this time. Just the basic
 MEGASQUIRT- 2001- V3.000 code to keep it simple.

For example: I assume the RX8 wheel will be incorporated
in the extra code so that is of no interest right now.
Is that a correct statement?

We can make a cheap steel disk that will work with 2nd gen,
third gen or RX8 keeping it simple.

Some of us would also like to use MSD units. As I understand
it these too can be fired with a simple five volt pulse.

Paul Lamar ...No rotor no motor.

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