Re: Coil wiring diagram /1954 pacific/cruising rpm engine bogging/coils

Posted by HH56 On 2019/11/19 14:08:04

The lower output or less efficiency has to do with the fact that electrons become much more active when concentrated and are at elevated temperatures. That fits the spark plug operation perfectly as the center electrode will be much hotter than the side electrode and electrons are concentrated on a relatively small area. The side electrode being connected to the shell will be much cooler because of the shell acting as a heat sink. The side electrode is longer so electrons are not as concentrated.

With the wrong polarity the spark could start from anywhere along the length of the side electrode and any distance above the recommended gap and cooler less active and concentrated electrons would tend to result in a weaker spark. With the proper polarity the spark will tend to be stronger and jump much easier when going from the center electrode outward.