Quick Answer: Why Would You Run A Hotter Spark Plug?

What heat range spark plug should I use?

between 500-850 degrees CelsiusIf it the heat range is too hot, your engine could experience detonation, pre-ignition, or power loss.

Most spark plug manufacturers recommend that the tip temperature remain between 500-850 degrees Celsius.

Heat ranges are designated by each spark plug manufacturer with a number..

Do I need a hotter or colder spark plug?

When making spark plug heat range changes, it is better to err on the side of too cold a plug. Running too cold a plug can only cause it to foul out, whereas running too hot a plug can cause severe engine damage.

How do I know if my spark plugs are too hot?

Blisters on the insulator tip, melted electrodes, or white deposits are signs of a burned spark plug that is running too hot. Causes can include the engine overheating, incorrect spark plug heat range, a loose spark plug, incorrect ignition timing or too lean of an air/fuel mixture.

What will a colder spark plug do?

The term colder plug and hotter plug refers to how fast or slow the plugs transfers the heat from the tip. A colder plug transfers heat faster while a hotter plug is slower. … This temperature range is cool enough to prevent knock and not melt the plug tip, but still hot enough to burn off the carbon and prevent fouling.

Does spark plug gap affect timing?

Changing the spark plug gap won’t affect the ignition timing, but it will have some affects on the ability of the spark plug to ignite the fuel. … A smaller gap might result in the misfiring and incomplete combustion, whereas a wider gap may become too much for the spark bridge.

When should a spark plug be hotter?

Use a colder heat range for leaner air/fuel mixtures. Rich air/fuel mixtures can cause the plug temperature to dip, allowing carbon deposits to build up on the tip. Use a hotter heat range for rich air/fuel mixtures. Advanced ignition timing: In general, advanced ignition timing will raise the spark plug temperature.

Does spark plug heat range affect performance?

The optimal temperature to remove carbon deposits from the tip of the spark plug is 450º – 500ºC. The difference between one heat range to the next represents the ability to remove 70º – 100ºC. The engine’s temperature affects the spark plug’s operating temperature. However, it does not impact its heat range.

Which NGK plug is hotter?

NGK plugs are colder the higher the number, hotter the lower the number. Starting with part # BKR6E-11 (heat range 6), a colder plug would # BKR7E-11 (heat range 7), a hotter plug would be # BKR5E-11 (heat range 5). For NGK Racing Plugs, the heat range is located AFTER the hyphen.

What happens if spark plug is too hot?

The most serious result of selecting a heat range that is too hot is overheating. Overheating will cause the electrodes to wear quickly and can lead to pre-ignition. … When the spark plug firing end (tip) temperature exceeds 800°C, pre-ignition originating from the overheated insulator ceramic can occur.

Do Iridium plugs run hotter?

Spark plugs with a hotter heat range will burn off carbon deposits more easily than a colder 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.

Which is better a resistor or non resistor spark plug?

Since resistor type plugs actually “resist” some of the spark energy, non-resistor type plugs actually deliver a more powerful spark. … Use of non-resistor plugs in vehicles that call for a resistor type can result in rough idling, high-rpm misfire, and abnormal combustion.

Can wrong spark plugs cause overheating?

Incorrect ignition timing is most extreme cases of a poorly running engine that can create extra heat but even things like worn spark plugs, a clogged fuel system or a dirty airflow sensor can cause your engine to create extra heat and run hot.