[C. Ludwig]

Skip all variants of the LS1 coil all together. Their output is far from impressive. The only LSx coil I would recommend is the truck coil (the one with the heat sink).

The LS truck coil will output around 115 mj peak @ 6ms charge. The AEM/Mercury can make that at 3 ms charge. If your EMS allows you to throttle the coil charge relative to demand (most do not) and supports direct-fire, you can really lean on the Mercury coil. They'll develop 250 mj at 6 ms charge time! That's more than any street capable CDI with a much longer spark duration. But, like a race CDI (M&W Drag boxes for example), you can't run the Mercury coil at that much dwell for extended durations on the street. If it's a drag only setup, then you can get away with running them that hard.

Inductive technology has come a long way over the last decade. The need for CDI has diminished as that technology has improved. We now have inductive coils that provide the same levels of output, with fast charge times, and none of the electrical noise associated with CDI. They package more neatly and are less expensive as well.