Quick Answer: How Do I Choose A Hotter Spark Plug?

How do you tell the difference between hot and cold spark plugs?

If you want to know why, read on….

A cold spark plug has a cooler tip and a hot plug has a hotter tip.

Cold spark plugs are used in high performance engines (like go karts engines that rev!!!), as high performance engines produce a large amount of heat..

Why would you use a colder spark plug?

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. 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.

Which spark plug is best iridium or platinum?

Iridium is said to be six times harder and eight times stronger than platinum with a 700° higher melting point. Iridium spark plugs have extremely fine electrodes while retaining excellent wear characteristics. Thanks to its strength, iridium spark plugs can last up to 25% longer than comparable platinum spark plugs.

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.

What’s the best spark plugs for horsepower?

The advantages of high-end spark plugs The best spark plugs for horsepower are either made out of platinum or iridium, although spending a little more on iridium spark plugs can turn out to be a better investment in the long run.

What is the hottest burning spark plug?

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 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).

What causes spark plugs to go bad fast?

Overheating Damage: Overheating spark plugs can cause the electrode to wear faster. Pre-ignition from an improperly timed engine can cause this, as can an incorrect air to fuel ratio. Oil Contamination: If oil seeps onto the spark plug, it will foul the tip.

What makes a spark plug hotter?

Some manufacturers numbering systems are opposite the other – for Champion, Autolite and Bosch, the higher the number, the hotter the plug. For NGK, Denso and Pulstar, the higher the number, the colder the plug.

What happens if you use a hotter spark plug?

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. Pre-ignition occurs when the air-fuel mixture is ignited by a hot object/area in the combustion chamber before the timed spark event occurs.

Does changing spark plugs improve performance?

Changing the spark plugs is a way of assuring top efficiency and performance. The misfires that may occur will increase exhaust emission as well as harm gas mileage. … This there may be lifelong spark plugs in the car, but problem still can happen that may result in spark plugs becoming increasing more defective.

Do Iridium spark plugs increase horsepower?

Better yet, upgrade to a Double Platinum or Iridium Spark Plug to increase your change interval to 100k miles. Increase your performance. Iridium plugs take less voltage to fire which results in more coil dwell time. That translates to better combustion, lower emissions, better fuel economy and more horsepower.

Are Iridium spark plugs worth the money?

It is estimated that iridium spark plugs will last for at least 60,000 miles. However, they’ve been known to go up to 80,000 miles, or even 120,000 miles, depending on the vehicle. … So, an investment in these spark plugs would surely be worth it for this. You may never actually have these spark plugs go bad on you.

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.