Re: Why the 10mm spark plugs?

Posted by Fish'n Jim On 2017/1/10 10:28:59

Akin to pondering one's own navel.
Asking why they used left hands threads, etc. It was the current thinking of that day and once you're a tooled up manufacturer, well, it sticks around.
There is a bit of thinking behind a smaller hole being less affected by compression forces, simply from the cross sectional area and pressure effect but is that an after or fore thought?
Spark plug technology has pretty much evolved with not much substantiative change. Screw a wire down a hole somehow. Rudy Diesel was the only one that didn't seem to see a need for those silly wires...