FBO's black HEI ignition box

TM mike, I will answer your question first & then the idiot in a separate post.
Bosch claims:
- 0.2mj when the A/F ratio is correct
- Over 3mj are reqd for rich/lean mixtures.
- approx 2mS elapses between initial ign & complete combustion.
But it is not that simple.....
From Bosch:
' This energy [ above ] represents only a fraction of the total energy in the ign spark, the actual ign energy. If sufficient ign energy is not available, there will be no ign.....for this reason a high enough level of ign energy must be provide to ensure that the A/F mixture will always ignite, even under unfavourable conditions.'

One of the best ign books is Phil Jacobs, 'Performance Ign Systems', HP Books-1306