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Show Proper Type Spark Plug Vital to Car Efficiency Informing car owners of the importance im-portance of proper type spark plugs in order to obtain the best performance perform-ance from an automobile, H. Rabez-zana, Rabez-zana, research engineer, says in part: "When a plug is too short it does not bring the firing points far enough into the combustion chamber. Good ignition under this condition is impossible. im-possible. The motor is bound to be sluggish and inefficient "A plug that is too long extends too far into the firing chamber. This will cause the lower end of the plug to become overheated, resulting in igniting ig-niting the fuel too early. "The correct length of plug fits so that the bottom of the spark plug shell is just flush with the inside wall of the cylinder head and the spark gap extends beyond into the combos tion chamber. "To get maximum power nnd efficiency effi-ciency from an engine it is absolutely necessary that the proper type spark plug be used, as recommended by the manufacturer's spark plug chart" |