With respect, Steve, I think you've missed my point:
I was saying distrubute the 12V to each cylinder, NOT the 25kV, and step it up at each spark plug.
I know how the usual points + condenser feeding ONE step-up coil and then distributing the 25kV works, (I was/am an electronics engineer), and have also rebuilt more than a few engines fitted with conventional electro/mechanical ignition in my time. I also know how easily the 25kV can track and short to earth in the usual environment of a car engine bay in the UK.
A buddy who had another SD1 V8 once opened the bonnet at night with the engine running. You should have seen the 'fireworks' display of lots of 25kV leaking and sparking to earth all over the engine! Dunno what make of high tension leads he was using, but obviously not very good ones.......
Last edited by Uplinker; 4th Mar 2013 at 17:46.