CDI vs Inductive Ignition Systems

[mysocal911]

Originally Posted by 304065

Fun thread and I like how you folks are staying away from ad hominem attacks. As I say on the opening post of this forum, this is a forum for exchange of information, and naturally some people hold passionate views. And none is so sacred that it cannot be respectfully challenged with data.

Since we appear to have more than one electrical engineer here, I wonder if you have any comment on this old thread, where I attempted to quantify the extent to which ignition energy from an inductive system declines as RPM increases, and how that changed with transistorized ignition and low-resistance, low-impedance coils.

Crane XR700 = capacitive discharge

Not to hijack but maybe some people might find it interesting.

Your graph and post #3 provide very good explanations.

[Jonny H]

Originally Posted by mysocal911

Last used on the '83 911SC.

No. All Porsche engines beginning with '84 911 3.2 used

You forgot the 930 Turbo which used CDI until 1989.