Table of Contents
- 1 What do the numbers on a plug mean?
- 2 Do you gap Denso iridium spark plugs?
- 3 How do you know the heat range of a spark plug?
- 4 What does the Z stand for in a NGK spark plug?
- 5 Are iridium plugs worth the money?
- 6 Do NGK iridium spark plugs come pre gapped?
- 7 Do I need a hotter or colder spark plug?
- 8 Why use a hotter or colder spark plug?
What do the numbers on a plug 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 you gap Denso iridium spark plugs?
In most cases your Iridium Power plugs do not need to be gapped. Should you decide to re-gap your Iridium Power plug, use extreme caution as improper gapping may damage or destroy the Iridium center electrode or porcelain center.
What is the difference between SC16HR11 and SC20HR11?
The iridium spark plug SC20HR11 is replaced with spark plugs SC16HR11. The Denso auto parts supplier replaces the Iridium spark plugs with a 0.4 mm diameter central electrode for the new, more wear-resistant Iridium TT spark plugs.
How do you know the heat range of a spark plug?
The heat range is determined by the insulator nose length and its ability to absorb and transfer combustion heat, the gas volume around the insulator nose, and the materials/construction of the center electrode and porcelain insulator.In identical spark plug types, the difference from one heat range to the next is the …
What does the Z stand for in a NGK spark plug?
“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). The letters after the heat range can indicate a number of things.
Do iridium spark plugs increase horsepower?
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. Lower your costs. It’s true – buying an upgraded plug does cost more than a basic spark plug.
Are iridium plugs worth the money?
Iridium is said to be six times harder and eight times stronger than platinum. This means that spark plugs can have even finer electrodes than ever before and still have excellent wear characteristics. It is also worth mentioning, that with platinum and iridium plugs you generally get what you pay for. …
Do NGK iridium spark plugs come pre gapped?
While most NGK spark plugs are pre-gapped, there are occasions when the gap requires adjustment. Care must be taken to avoid bending or breaking off the fine-wire electrodes. If the gap must be adjusted, use a tool that only moves the ground electrode and does not pry between or against the electrodes.
Are iridium plugs worth it?
Iridium spark plugs give you even better gas mileage, performance, reliability, and longevity than double-platinum plugs. Due to the advanced material and innovative technology integrated into iridium spark plugs, these plugs are priced higher than copper and platinum options.
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.
Why use a hotter or colder spark plug?
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.