[Ant]

Looking at different ignition systems, MSD, CRANE, ACCEL etc they seem to have a lot of punch down low with multi sparks and after 3000rpm go into a single short spark.
Reading different articles there is digital inductive ignition which apparently has a longer spark. confusing to a non tech person like me, then I read where a single coil ignition isnt as efficient as a multi coil system.

My 373 Yates engine is pretty much all done by 7000rpm, we are not running big revs like a nascar engine and probably for most of the time 6500rpm produces over 600bhp there is not a great need to rev the guts out of it, so if the Nascar guys run 9000 rpms with a single coil and MSD or Crane ignition, I cant really see how a set of 4 coils or a coil per cylinder is going to change the world...it seems a single coil can keep up with their requirements.