0.4mm Iridium Center Electrode Delivers Maximum Spark Energy
Iridium Power® best demonstrates its performance improvement during acceleration. The world's smallest center electrode and specially shaped ground electrode deliver maximum spark energy while withstanding temperatures greater than 4000º F. These features combine to achieve higher ignitability and require lower spark voltage than ever before. As a result, acceleration improves in comparison with normal plugs.
Ignitability That's a Cut Above
To increase ignitability, the important point is to let the flame kernel produced by the spark to grow unobstructed. Normally, this can be accomplished by widening the spark gap. However, this causes spark voltage to increase, which has the opposite effect. Iridium Power uses DENSO's patented U-Groove ground electrode to achieve maximum ignitability while minimizing required voltage.
1. 360° Laser Weld
2. 0.4mm Iridium Tip
3. U-groove Ground Electrode
At 0.4mm in diameter, the DENSO Iridium Power center electrode tip is the world’s smallest. It produces the hottest, most concentrated spark, while requiring the lowest voltage (5,000 less volts to fire than conventional spark plugs). For maximum performance under the most extreme conditions, this plug is the one! Because of its patented technology, the Iridium Power plug outperforms any plug today. You’ll enjoy more horsepower, faster and easier starts, fewer misfires under heavy loads, plus better fuel efficiency.
Iridium Power best demonstrates its performance improvement during acceleration. Iridium Power has a 0.4 mm diameter Iridium center electrode and a specially-shaped ground electrode. These features combine to achieve higher ignitability and require lower spark voltage than ever before. This enables high-response driving with fewer misfires than under higher required voltage spark conditions, and fewer misfires under lean conditions. As a result, acceleration improves in comparison with normal plugs.
The superior ignitability from the fine electrode (0.4mm) of Iridium Power draws out much more performance from the engine. Comparing a standard plug (W20FS-U) with an Iridium Power (IWF22) on a 2 cycle 50cc engine, fuel consumption improved from 41.74km/L to 43.69km/L (about 5%). Note: Mileage measured using a chassis dynamometer; actual driving results under normal conditions may vary.
Our customers choose the DENSO Iridium Power spark plug for its unsurpassed performance, increasing overall power and acceleration. For that extra burst of power when you need it most, you can count on the combination of revolutionary Iridium alloy and laser welding technology which allows DENSO to harness the power of Iridium to dramatically increase firing performance. The result is maximum horsepower and torque. From extreme race conditions to the daily driver, the Iridium Power is the ultimate choice for performance.
Iridium is 6x harder and 8x stronger than platinum, this allows DENSO engineers to shrink the center electrode tip to only 0.4mm, the world's smallest , and still maintain durability. This tiny electrode reduces the required voltage for the plug to fire resulting in improved firing performance. DENSO uses a patented Iridium alloy formula which employs over 90% Iridium, and small amounts of another material called Rhodium, which is added to even further reduce oxidation.
Also, a U-Groove has been cut inside the ground electrode to maintain the large volume of space required to form the nucleus of a flame. While still keeping the required voltage low, this technology enables excellent firing performance without increasing the spark gap.
The tip of the ground electrode has been cut to form a taper. This greatly improves firing performance by reducing "quenching," or the absorption of spark energy by the electrode.
At first, the use of Iridium as an electrode material was impossible due to its extreme hardness and high melting point. Now, DENSO has developed a patented 360° laser welding process to firmly affix the Iridium material to the center electrode in a bond so reliable the electrode resists wear even in the harshest conditions.
Iridium Power is a high performance spark plug. The Iridium Long Life is the genuine part that comes OE from car manufacturers.
No. The plugs can just replace the ones you take out. The Iridium Power spark plug itself has a low required voltage and high ignitability and is able to draw out the power of an engine. The superb performance of Iridium Power spark plugs is obtained merely by installing them in your vehicle. And, of course, there is no need for special tuning.
In ordinary cars, use a spark plug with the same heat range as a normal spark plug. In highly tuned vehicles, select a heat range to suit the tuning level of the engine. (Ordinarily, the heat range of a highly tuned engine tends to be colder.)
Refer to the following table to compare the heat range of the Iridium Power and other spark plugs.
Can the Iridium Power gap be adjusted? Can I use any spark plug cleaners with Iridium Power?
Do not adjust the spark plug gap. Use of a spark plug cleaner for short periods is acceptable if low pressure is used. Iridium Power spark plug gap is already set at the optimum distance. If the electrode is damaged by gap adjustment or cleaning, the spark plugs will not perform to their best.