DIY LTCC or similar system for LT1s

[spfautsch]

As to the crazy-ass curve, I was referring to the maximum potential of having 8 coils, with advancing coil charging by 2 ignition events, and such.

I think you still might be confusing Spark Advance with coil charging (dwell) somewhat.

Just for the sake of sanity let's establish terminology. Dwell is when the EST line (or whatever is controlling a coil per cylinder or waste spark setup) goes high (or possibly low) to cause the ignition control module (principally a huge transistor) to turn on and charge the coil. When the EST line goes low or turns off the coil's magnetic field collapses, resulting in the high energy discharge (aka the spark event). Optimum dwell time is where the coil has generated the largest magnetic field the transformer core can sustain, causing the "fattest" discharge. It is a function of diminishing returns - more dwell creates more energy up to the coil's saturation point, and beyond that more dwell simply creates wear and tear on the components because the energy has to go somewhere so it heats the coil and components and is thus dissipated.

In the "good old days" when this was controlled by mechanical point contacts, dwell was usually referred to in degrees. This is where the potential 90 degrees comes in because of the inherent nature of a crossplane v8.

Spark advance and dwell are related as such - the spark event happens at the end of dwell time and lasts a very short time. For a distributor setup the rotor has to have it's conductive end in proximity to the corresponding tower post for the secondary energy to be transferred to the post, plug wire, etc. The size of the conductive "arc" of the Opti and most HEI2 rotors is elongated like it is because there's no mechanical advance system such as in the original HEI.

Any arguments?

This is probably the strategy all the racers want,

You don't have to be a "racer" or a hot rodder to benefit from healthy combustion ignition. Coil per cylinder setups are being used almost exclusively on current vehicles because they promote more complete combustion which can reduce emissions and increase efficiency. Everybody likes improved efficiency, right?

and maybe the original LTCC provides, but we have no proof yet.

I think if delcowizzid's claim is accurate that's pretty strong evidence that the LTCC module is commanding quite a bit of dwell time, at least during cranking which makes sense. I believe the (edit: ls coil dwell limiter) number I've seen is 8 milliseconds, which is a proverbial crap-ton of dwell.