How do you read spark plug numbers?

“A” indicates a 12 mm x 1.25 with a 3/4″ reach. “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).

Know more about it here. Also know, what do the numbers mean on NGK Spark Plugs?

Typically the heat range for NGK Spark Plugs varies from 2-11. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. This means the spark plug will heat up easily and reach its optimal operating temperature.

Beside above, 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.

Just so, what is the heat range number on a spark plug?

Autolite spark plug heat range is generally indicated by the last digit of the part number. Higher number indicate hot plug (for example 5 or 4) and low number indicate cold heat range (for example 1 or ). Spark plug heat range is the measure of how fast the spark plug tip dissipates combustion heat.

What does R mean in NGK Spark Plugs?

resistor spark plugs

Are NGK good spark plugs?

NGK (5464) BKR5EIX-11 Iridium IX Spark Plug

Here is another really good spark plug from NGK. They are specifically made to install very easily on today’s higher performance type engines. The other is that they are made to be used in high-performance engines and they work really well in them.

What size socket do I need for NGK Spark Plugs?

A plugs hex size determines the socket required for installation. While 5/8″ (16mm) and 13/16″ are the two most common plug hex sizes, plugs can have a hex as small as 8mm or larger than 1″.

What does the R mean in spark plugs?

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.

What is the end of a spark plug called?

Spark Plug Parts: The Top-to-Bottom Tour

At the top of the spark plug sits the connector, or terminal. This is where the spark plug wire attaches. The terminal connects inside the plug to the copper core of the center electrode, which is surrounded by insulation.

What is the tip of a spark plug called?

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 tips of the side and center electrodes are about 0.020 – 0.080 inch apart from each other (depending on the type of engine), creating the gap for the spark to jump across.

What does Black Spark plugs mean?

A black, feathery carbon deposit on your spark plugs can be an indication of a weak spark or an overly rich fuel mixture. Causes may include a stuck choke, misadjusted or heavy carburetor float, a leaky injector or carburetor needle valve, low coil output or high resistance in your spark plug wires.

What color should my spark plugs be?

Light brown or tan colored deposits on the tip of your spark plugs are normal. But deposits of different colors and consistencies can be indications of bigger problems.

What does a GREY Spark Plug mean?

In general, a light tan/gray color tells you that the spark plug is operating at optimum temperature and that the engine is in good condition. Signs of fouling or excessive heat must be traced quickly to prevent further deterioration of performance and possible engine damage.

What is the hottest burning spark plug?

Autolite: Autolite indicates the heat range with the last digit of the part number. For example, 3923 has a heat range of 3. The higher the number, the hotter the plug.

When should a spark plug be hotter?

Spark plug heat ranges should stay the same as at sea level unless racing above 3,000 feet, where one step hotter usually suffices. With a new or unknown combination, play it safe. Always start at least 1-2 heat ranges on the cold size of the mean heat-range for the series of plug you are running.

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 one step colder spark plugs mean?

A: Step colder plugs will dissipate heat more efficiently, which will bring down combustion chamber pressures and prevent pre-detonation. They are not recommended for stock or close to stock power vehicles because the cylinder temps do not get hot enough, which can cause carbon buildup on the plugs.

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