MTFCA Forum

I was lucky enough to score a new old stock box of the above spark plugs. I think there are 10. Anybody here use them and are they as good as the champions?

Thanks

See:

https://www.mtfca.com/discus/messages/3 ... 1384614515

https://mtfca.com/phpBB3/app.php/gallery/image/2764

Thanks. What should the gap be on the Edison plugs?

They are 100 years old and brand new. They will not run any better than a 100 y/o used Champion plug. Personally, I think it's a shame to use something which survived 100 years "as new", which looks good as a display for others (particularly younger folks to see back into the past), and simply make them look just like billions of other used, dirty spark plugs. But that's just me.

Are yours single fire (single ground electrode) number 14 or dual fire (two ground electrodes) number 13 plugs?
Both fit a model T and both work fine.
Both were made for several years and in a variety of porcelain shapes. Individually picking them up and getting four matching plugs seems to be difficult. I have several of each number, but no full matching sets. NOS Edison plugs are fairly common. I think I have about five of them in original boxes.

I see Scott C snuck in! I agree with him. I cannot bring myself to use my NOS ones either.

Edison #14 are used on the Model T. They are desirable because of the close friendship between Henry Ford and Edison who was one of the few men Henry idolized and held in higher esteem than himself. The gap is probably .025”, the same as on the Champions X plugs, but I’m not sure. Jim Patrick

Marty,

I use .028 to .030 gap on my USED Edison plugs in our 15 runabout and the car runs great.

Edison spark plugs, number 14, are installed in the 1922 Model T touring at the Edison estate in West Orange New Jersey.... Gapped at 0.025", car drives without problem traveling the hills around the Glenmont Estate.

Marty,

I had a few Edison plugs in my Roadster. I ran them for probably 15+ years.

For best results, any gaskets/washers used in take apart plugs ought to be relaced every time they're taken apart. Keep electrode profiles as close to as-new as possible. Carefully file eroded electrodes to restore profile. Don't sand blast glazed porcelain parts. Don't use wire brushes on spark plug porcelains. A tight engine with good oil control using quality oil will require very little spark plug cleaning, if any. Avoiding needless starting and idling and short trips/cold running will prevent spark plug fouling issues. Spark plugs can only function as well as the rest of the ignition system allows.