MembersPage/EricN/Ignition (2005-07-29 14:08:02)

Ignition (output, ignadv and dwell) page for MembersPage/EricN

Note that trigger is on MembersPage/EricN/Trigger

Even-fire 6-cyl

using 6 LS1 coil near plug ignition transformers

This is what I know so far: 4 wires per coil

Factory look is eventually the goal, but for now, I want to practice on this engine the same setup that will be in my racecar when it is actually built, then I will revert back to more simplistic setup.

I have done some various measurements on a running vehicle. Trigger is by a 4 Volt signal (I didn't check the trigger time but the scale was set to 1 second and it was just a vertical blip) that does not change at all with RPM. I suspect it is extremely low amp, logic level signal.

How to output a logic-level ignition signal

Use the same driver as the original IGBT is driven from, just solder a jumper wire in place of the IGBT (don't solder IGBT for given channels), between the gate and drain the 2 pins closest to the EC36 connector, and use ign_out=70 in your config /Emil

We usually use ignition channel 2 and 5 for these (recent tradition, that assembled ECMs are setup with ign channel 2 and 5 this way unless ECM goes for V8 with COP: very handy when IgnitionPage/TransformerWithAmplifier is to be used), you need 4 more logiclevel channels (for total 6).

MembersPage/MarcellGal/EngineSwap also uses similar logic-level ign setup for IgnitionPage/TransformerWithAmplifier


Ignition sequence

... TODO: fill this in, there is just too many combinations with a 6-cyl fully sequential to get it done with "try and see" method.

Cant seem to find the description for this but I used the injector one, if I am wrong, please point me to the page that has this info so I can learn it.

h[2]= 08 02 20 04 10 01 00 00


Dwell - for LS1 ignition transformers

I have measured dwell:

Please correct the above, obviously there must be some misunderstanding as 59 degrees is not equal to 95%*120 crankdegrees.

A) wires on the trigger and the other on ground, ran the truck (v8) and changed between the different scales (dwell, duty, pulse width, voltage), I assume that is the wrong way todo it?

There really are many ways, eg.:

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I never mentioned coil near plug, I said LS1 thinking that was a good description and I keep forgetting that this is world wide and most of the world has little interest in north american V8