high volt ignition coils

[RICE RACING]

Its all quite light, all up weight is less than the stock parts swapped out.

The problem with CDI on a rotary is the burn time is quite small, ~ around 420usec, it can multi strike all it likes but the even is long gone after then to establish good combustion, it does help but it never makes it as good as a long burning inductive ign set up. Any revs above 2000rpm to 3000rpm my own testing and feeling is the CDI is superior as shown by what mixture it will reliably fire, it will burn a much leaner mixture without misfire and also a much richer mixture as well.

I did a test where I can swap out both my ign systems (stock and HKS DLI) with the full CDI coil on plug and on return to idle and idle quality the stock will always work better. Many years ago when I was pioneering *seemed that way* the Crane Hi6 and LX92 on each leading coil I found the same thing, but I never had the equipment to actually measure what was happening, I did note that the idle was worse and without multi strike it was bad, but once revs and speed (time for combustion were shortened) the CDI immense current and voltage come into its own and there are big gains to be had.

This is why the HKS use a "twin power system" transistor for low speed and capacitor for high speed.