What do NGK Spark Plug numbers mean?

What do NGK Spark Plug numbers mean?

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.

Do NGK Spark Plugs make a difference?

This would be more accurately described as “less performance loss.” Spark plugs do not increase the performance of an engine — even spark plug manufacturers are fairly forthright about that. They won’t make the engine perform better than it did when it was new, but they will help it stay at that level longer.

What are the different types of NGK Spark Plugs?

Types of Spark Plugs

• Platinum Spark Plugs.
• Spark Plugs with Multiple Ground Electrodes.
• Spark Plugs with V-Groove in the Centre Electrode.
• Spark Plugs with Supplementary Spark Gap.
• Semi-surface Ignition Type Spark Plugs.
• Hybrid Spark Plugs.
• Racing Spark Plugs.
• LPG/CNG Spark Plugs.

What happens if you use a hotter spark plug?

The insulator nose of a hotter spark plug has a longer distance between the firing tip of the insulator and the point where insulator meets the metal shell. Therefore, the path for the dissipation of heat from the insulator nose to the cylinder head is longer and the firing end stays hotter.

Why use a hotter or colder spark plug?

Air/fuel mixture: Lean air/fuel ratios raise cylinder-head temperatures, requiring a colder plug. Rich air/fuel ratios require a hotter plug to prevent fouling. Mixtures that cause the plugs to read lean may contribute to pre-ignition or detonation.

When should you use a hotter spark plug?

1. Air/Fuel Mixture: Lean air/fuel ratios raise cylinder-head temperatures, requiring a colder plug. Rich air/fuel ratios require a hotter plug to prevent fouling. Mixtures that cause the plugs to read lean might contribute to preignition or detonation.

What kind of spark plug does a Harley Davidson use?

NGK and Autolite among others have always been a preferred performance plug for Harley motorcycles. In addition it is often more convenient to use aftermarket spark plugs aside from the enhanced performance.

Why does my spark plug on my Harley not work?

If the plug has oil on it, then it’s oiling up and may not work efficiently, potentially causing a misfire or stuttering under hard acceleration. If it’s just dark or black the bike could be running too rich. A heavy accumulation of carbon on the nose can cause a leakage path to earth.

What kind of spark plug does a Sportster have?

Harley Spark Plug Cross-Reference Harley Spark Plug Cross-Reference XL Sportster 1000 XL Sportster 900 Shovelhead 1975-1981 Panhead/Shovel 1947-1974 Screamin’ Eagle 2413 EVS13S SH12S ACCEL – – 2410A – AC Delco 42F/42-6FS 42F/42-6FS 44NS/44XLS – Autolite 4123 4265 –

Which is the best spark plug to buy?

NGK has been known to produce high quality spark plugs for a long time, and these iridium plugs are some of the finest ones they have developed to date. The Iridium plugs are higher in quality than plugs that have electrodes made of nickel or platinum.