What is the R in a spark plug?

The “R” indicates a resistor type spark plug. Resistor type spark plugs reduce the amount of radio frequency interference (rfi) that can cause ignition misfires and static on the radio, if so equipped. The number at the end indicates the recommended spark plug gap in tenths of a millimeter.

Full answer is here. Likewise, what does the R stand for on NGK Spark Plugs?

resistor spark plugs

Additionally, what is in a spark plug? A spark plug is made of a center electrode, an insulator, a metal casing or shell, and a side electrode (also called a ground electrode). The metal casing or shell is a hexagon-shaped shell with threads, which allow the spark plug to be installed into a tapped socket in the engine cylinder head.

Subsequently, question is, what do numbers mean on spark plugs?

The heat rating is a measure of the amount of heat dissipation. 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 I need a hotter or colder spark plug?

Spark plugs have 2 jobs. 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. The goal is to keep the cylinder temperature between 550*c and 800*c which is about 1020*f to 1470*f.

What does the P stand for in spark plugs?

The letter “P” indicates a platinum center electrode. The letter “S” indicates a copper center core. The letter “V” indicates a fine wire gold palladium center electrode. The letter “Y” indicates a V-grooved center electrode. The number after the – indicates the recommended spark plug gap in tenths of a millimeter.

What is the best NGK Spark Plug?

The 5 Top-Rated Spark Plugs
Editor’s PicksBrandRating
Best OverallNGK 6619 Iridium Spark Plugs4.4
Runner UpBosch 4417 Platinum+4 FGR7DQP Spark Plug4.6
Best Budget BuyDenso (4503) PK16TT Platinum TT Spark Plug4.5
Best Iridium Spark PlugsNGK 5464 BKR5EIX-11 Iridium IX Spark Plug4.5
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How do you decode NGK Spark Plugs?

How you crack the NGK code
  1. The letter combination (1-4) before the heat rating indicates the thread diameter, hexagon spanner width and the design.
  2. The 5th position (number) stands for the heat rating.
  3. The 6th letter identifies the thread length.
  4. The 7th letter contains data about special spark plug construction features.

What size is a NGK Spark Plug?

14mm

Do I need a hotter 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. The higher the compression ratio, the colder the spark plug needs to be.

Do I need resistor spark plugs?

Resistor plugs help suppress spark plug noise, a valuable trait under certain circumstances. Resistor type spark plugs typically include an “R” in the part number for ease of identification. But not all spark plug manufacturers include this designation, so looking at the current plug does not always help.

What do the numbers and letters mean on a NGK 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 does the Y mean on spark plugs?

The letter “S” indicates a copper center core. The letter “V” indicates a fine wire gold palladium center electrode. The letter “Y” indicates a V-grooved center electrode. The number after the – indicates the recommended spark plug gap in tenths of a millimeter.

How many sizes of spark plugs are there?

There are currently three spark plug thread diameter and pitch sizes used on motorcycles and ATVs: 10 mm x 1.0, 12 mm x 1.25 and 14 mm x 1.25.

What are the three major parts of the spark plug?

A spark plug comprises three main parts: the housing, insulator, and electrodes.

How do I know if my spark plugs are bad?

Symptoms of Bad or Failing Spark Plugs. Common signs of faulty spark plugs include slow acceleration, loss of power, poor fuel economy, engine misfires, and difficulty starting the car.

How often should you change spark plugs?

If you check your owner’s manual, you‘ll probably find that your automaker recommends you replace your spark plugs roughly every 30,000 miles. That’s fine if you‘re using stock spark plugs. However, the actual timing of replacement will vary depending on other factors.