Why should I use the Iridium Power®?
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.
What design features make the Iridium Power stand out from competitors?
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.
What's the difference between Iridium Power and Iridium Long Life?
Iridium Power is a high performance spark plug. The Iridium Long Life is the genuine part that comes OE from car manufacturers. Please click here for more information.
Does the engine need to be specially set when fitting Iridium Power?
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.
How do I select the correct heat range when fitting Iridium Power to my vehicle?
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.