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Multi-coil ignition any advantage or theory.
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. |
There are many reasons.
One coil with a distributor has many places for failure: only one coil, which works harder; long ignition leads, rotor to cap gap (spark has to jump this gap as well as the spark plug). Multi coils: engine will still run with one coil failure, more "off time" for coils which extends their life, short or no leads, no other gaps to jump, no distributor to fail (rotor button, cap, pickup assembly). |
Multi-coil
Thank Gary, Modern technology you cant beat it. I guess an old tech Ford windsor with a tip top ignition system is still going to do the job, as with my type of car it doesnt do a lot of miles for that matter I still have a couple of years to complete this project. I dont have an ignition at present and would like to enhance the ignition or make it as reliable as I can, I sold the MSD setup that we dynoed the engine with...
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