I have two old Champion and two Precision spark plugs. I was wondering if a person could restore them and make them operational again. Is this possible? I thought it would make my 1926 Fordor's engine look more period correct, instead of those modern looking plugs.
Sure is, and I like how they run compared to modern plugs. Some photos of T plugs.....
Lots of threads here on this topic.
Take a fine mill file and file the side electrode so that it has square edges and a square end. When I say square I mean that you must have sharp edges for the spark to have a place to jump from. The center electrode must be flush on the bottom so that it is as if you did a fresh cut perpendicular to the shaft. Now the electricity can easily jump from the center to the outside contact from a sharp edge to a sharp edge.
Now watch out because it will work like new.