Follow up test with a CDI ignition

Bewy said

I am not doubting that there is some amount of retard in any ign system. Could it be due to coil differences? It is well known that there is retard with magnetic trigger ign due to distortion in the p/up signal as rpm increases.

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That I’ve checked, just not with any of the Mallory 7 boxes. They only take one Mallory coil and two MSD coils but I don’t have theMSD coils.

I have tested with different coils and I never say any difference. I heave never tried an E coil but I have one here now I can use.