My restored 1928 Model A Roadster came with Firestone S-80-CF spark plugs. I cannot find through multiple searches the recommended gap for this plug. Any help/reference would be greatly appreciated. Also, does anybody know the difference between this Firestone plug and the Champion 3X plug (other than cost!)?
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I had a easy to use spark plug gap tool it was basically like a pliers with a spark plug gap ring.
I had for maybe 20-30 years but lost it in a move.
Tried a web search but could not find it anyone know if it is still made
Thanks Ed
I have been running TT-10 spark plugs for 2000 miles on this trip and the porcelain is white as snow. Can someone suggest another plug? I am confused and thought I needed a hotter plug?
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