DIY LTCC or similar system for LT1s

[lionelhutz]

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. This is probably the strategy all the racers want, and maybe the original LTCC provides, but we have no proof yet. It would be nice, though.

With a properly done single coil ignition system, the timing advance has no effect on the dwell. The rpm is what limits the dwell.

With a properly done eight coil ignition system, the timing advance has no effect on dwell even when using one common signal to tell each coil when to fire. The rpm will have no effect on dwell either.

Maintaining an ideal constant dwell IS the main advantage of 8 coils, since that means you're providing the cylinders with the strongest possible spark at all times.

According to this page http://www.megamanual.com/seq/coils.htm shows the LS2 coil (12573190) having a minimum dwell time of 1.760 mSec.

I predict you will run into this minimum coil dwell time somewhere between 4000 rpm and 5000 rpm assuming you're using around 36* of timing and you are switching to the next required coil at each TDC event (or each low-res leading edge).