What do the numbers mean on a spark plug?
The heat range of a spark plug is the range in which the plug works well thermally. The heat rating of each NGK spark plug is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type.
What spark plug is hotter 8 or 9?
Champion plugs are hotter the higher the number, colder the lower the number. Starting with part # RCJ7Y (heat range 7), a colder plug would be # RCJ6Y (heat range 6), a hotter plug would be # RCJ8Y (heat range 8).
What NGK means?
NGK manufactures and sells spark plugs and related products for internal combustion engines, along with ceramics and applicable products. NGK stands for Nihon Gaishi kabushikigaisha, the Japanese name of NGK Insulators.
What does the Z stand for in a NGK spark plug?
“Z” indicates a 10 mm x 1.0 with a 1/2″ reach. “G” indicates a 10 mm x 1.0 with a 3/4″ reach. The number (82 in this case) indicates the heat range of the spark plug, the higher the number the hotter the heat range (opposite of NGK and ND spark plugs). The letters after the heat range can indicate a number of things.
What do the letters on NGK spark plugs mean?
The first letter of the NGK spark plug code (in this case a “D”) indicates the thread size of the spark plug. There are three spark plug thread sizes currently being used in motorcycles and ATVs. “B” indicates a 14 mm x 1.25 pitch size, “D” indicates a 12 mm x 1.25 size and “C” indicates a 10 mm x 1.0 size.
What do the numbers on spark plugs mean?
The numbers on the NGK spark plugs indicate the heat range of that particular plug. While most spark plug manufacturers use a higher number to indicate a higher heat range, NGK Spark Plugs are opposite. Therefore, the higher numbers mean that the plug is colder, and the lower numbers indicate hotter ranges.
What heat range sparkplugs should I use?
There are restrictions on the temperatures at which spark plugs can be used: the lower limit is the self-cleaning temperature and the upper limit is the pre-ignition temperature.A spark plug only functions completely when its center electrode temperature is between these temperatures of about 500°C and 950°C .
What are spark plugs heat range?
Most spark plug manufacturers recommend that the tip temperature remain between 500° C and 850° C. Heat ranges are designated by each spark plug manufacturer with a number. In broad terms, spark plugs are often referred to as “hot plugs” or “cold plugs.”
Which NGK spark plug?
NGK Spark Plug Co., Ltd. NGK Spark Plug Co., Ltd. (日本特殊陶業株式会社, Nihon Tokushu Tōgyō Kabushiki-gaisha) is a public company established in 1936 and based in Nagoya , Japan. NGK manufactures and sells spark plugs and related products for internal combustion engines, along with ceramics and applicable products.