DIY LTCC or similar system for LT1s

[Fast355]

EFI connection 24x swap with an 0411 is how I would fix the optispark in a LT1. The only non factory part at that point would be the reluctor ring itself.

[steveo]

definitely a great hobby project.

i would consider building a more general purpose piggyback ignition controller.

make it accept many types of signal.. opti, various reluctors. make it work for arbitrary number of cylinders.

make it able to drive coil per cylinder, waste spark, -or- single coils for distributors.

give it a loadable config file. add two analog inputs for a map or tps.

give it tables for add/subtract advance, dwell, multiple sparks per cycle, cut and retard options for nos n rev limit....

arduino for a brain should be able to do it

if its worth doing its worth doing well

[vilefly]

steveo, check this chip out.
https://www.google.com/url?sa=t&rct=...2A8bwU5MCqf9UA
Also, there is the NanoEFI project, which uses an arduino to run things. https://www.google.com/url?sa=t&rct=...X5-zzu0MGJKJLg

I have the single chip 1cyl engine controller IC on backorder, should arrive next month or so. it contains its own reluctor signal processing and is programmable. It even resolves the signal to a tenth of a degree. So, I just had to have one to poke at and prod.

[vilefly]

Fast 335,
Sounds too expensive for me. $1200 just to run like it normally does anyways. Add to that obd2 tuning program and programmer for the new ECM to get it running right for another $1000 + time. I could simply drop in a LS engine and computer instead.

My ulterior motive is to make my ignition system into an ion sensing ignition system. That way, I can directly measure cylinder pressure and produce the most optimal spark timing for any condition on the fly. The optispark signals will need no decoding to produce a 1 degree accuracy for my system. The LS system provides me with no such decoding output that I can splice into.