Vtg 1920's Blue Crown Spark Plugs E9 Set of 8 Lot Auto Indy Car Performance would make a great display for the man cave, service station garage!!! not sure of all fitments, guessing they were from an old v8
Blue Crown E9 spark plugs are vintage spark plugs, likely from the 1920s or 1930s, produced by Blue Crown. They feature a "twin electrode" design. The "E9" designation likely refers to a specific part number, possibly indicating the heat range and other characteristics of the plug.
Here's a more detailed breakdown:
Vintage:
Blue Crown spark plugs, including the E9 model, are considered vintage, likely dating back to the early to mid-20th century.
Twin Electrode Design:
They feature a "twin electrode" design, which may refer to two ground electrodes instead of the more common single ground electrode.
Part Number:
The "E9" is likely part of the spark plug's part number, which can be decoded to reveal details about the plug's specifications like thread size, reach, and heat range.
Heat Range:
Spark plug heat ranges are indicated by numbers, with lower numbers typically indicating hotter plugs. Therefore, an "E9" plug would likely be a cooler plug compared to an "E7" or "E8".
Applications:
These plugs were used in various vehicles of the time, including Studebakers, Packards, and Cadillacsselling as pictured
more than welcome to pick up as shop in butler pa
061325 cg