DIY LTCC or similar system for LT1s

[vilefly]

Ok kur4o,
here is quick screenshot I grabbed from playback mode. This event is during cranking/startup. Just like the 3800 engine, it starts with simaltaneous double-fire, then switches to sequential on the 3rd revolution. Basically, it pulses all injectors once per revolution, until the 3rd rev.
lt-1 injector startup.jpg
The current draw indicates how many injectors are firing.
I was carrying on conversations with 2 different people when I was doing this at the last 15 min of the day. So excuse the lack of other reference signals.

[vilefly]

I am posting this just for easy reference, so we can find this all in one place. The Northstar ignition module wiring and the signal waveforms going in and out of it.
northstar ign_module.jpg
northstar3-2.png
Hope this answers more questions than it creates. During startup, no 5v signal is sent to the BYPASS input until after 400rpm, where 5v makes the module switch to computer ignition control. From then on, the computer has direct control as to WHEN the next coil is going to fire. The module keeps track of WHICH one to fire.