What is the proper spark plug reach?
What is the proper spark plug reach?
Definition & Description. The reach is the distance between the end of the threads and the seat of the spark plug. It does not include the electrodes or any extended metal shell.
What is the heat range number 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.
How is the reach of a spark plug calculated?
It is measured from the seat of the plug to the end of the threads; it does not include the electrodes, or an extended metal shell. When custom-selecting a spark plug, the electrode length and projection should be included in the calculation when taking into consideration the clearance in the combustion chamber.
What kind of spark plugs have the same reach?
“As an example, an Autolite copper 105 versus an XP Iridium 105 will have identical ceramic temperatures and the carbon burn off will be the same,” says Reeves. A spark plug’s reach is defined as the length of the threads.
Where can I find NGK spark plug codes?
Leading in the automotive industry, NGK spark plugs are available for virtually every type of engine – cars, motorcycles, marine applications, small engines, and power tools. The NGK spark plug finder helps find the right spark plug via the NGK spark plug codes.
Which is the hottest spark plug on the market?
Within the Autolite family, this particular plug is toward the hotter side of the range that runs (cold-to-hot) 3922 – 3923 – 3924 – 3926. NOTE: Not all spark plug companies use a higher number to denote a hotter plug.
“As an example, an Autolite copper 105 versus an XP Iridium 105 will have identical ceramic temperatures and the carbon burn off will be the same,” says Reeves. A spark plug’s reach is defined as the length of the threads.
Within the Autolite family, this particular plug is toward the hotter side of the range that runs (cold-to-hot) 3922 – 3923 – 3924 – 3926. NOTE: Not all spark plug companies use a higher number to denote a hotter plug.
When do you know the correct spark plug?
So for a normal, street-driven engine, that 3924 recommendation is a great place to start. After a few hundred miles of operation, you could pull one or more spark plugs and evaluate their condition. As long as the center electrode is burning off the carbon deposits and appears relatively clean, then the heat range is probably correct.
What should the heat range be on a spark plug?
Be prepared to supply some basic vehicle information, including any modifications you’ve made. As a rule of thumb, you can expect to require one heat range colder than the factory-supplied plugs for every 75-100 horsepower you’ve add with your modifications, according to Champion Spark Plugs.
