Iridium Spark Plug

 
 
 

HIGH PERFORMANCE SPARK PLUG

By harnessing the power of iridium, DENSO were able to shrink the surface area of the centre electrode tip. A smaller tip allows the spark to expand in a greater area, maximising firing performance improving acceleration in comparison with normal plugs.

 

Why DENSO Iridium Power?

  • Iridium Power uses DENSO's patented U-Groove ground electrode to achieve maximum ignitability while minimizing required voltage.
  • At 0.4mm in diameter, the DENSO Iridium Power center electrode tip is the world’s smallest.
  • Produces the hottest, most concentrated spark, while requiring the lowest voltage
  • Produces maximum performance under the most extreme conditions

BENEFITS

 

It is no secret that Iridium is 6 x harder, 8 x stronger and could take temperatures of 650°C hotter than platinum (i.e. exceeding 2454°C). 

 

Iridium (Ir)

Platinum (Pt)

Nickel (Ni)

Gold (Au)

Silver (Ag)

Melting Point

2454

1769

1453

1063

960

Strength

112

14

68

13

13

Electrical resistance

5.3

10.6

6.8

2.3

1.6

Hardness

240

40

160

25

26

 

Laser Welding

There wasn't a welding tool hot enough to melt an iridium electrode tip to a nickel base. That is until DENSO pioneered their patented Laser Welding Process that provides a 360° seal so reliable the electrode resists wear even in the worst conditions.

Improved Firing Performance

To improve firing performance, the contact area between the electrode and the flame nucleus needs to be reduced in size. This is why the electrode was made as fine as possible to a diameter of 0.4mm. Compared to normal Spark Plugs, with a spark gap of 0.8mm, the ignitability limits are better by 2.5.

Lower Required Voltage

The required voltage in the Iridium Power plugs is between 3 & 5 kv less than normal plugs. This is due to the ultra-fine 0.4mm diameter ground electrode and U-groove design. Because required voltage is kept low, Iridium Power can be used in high performance engines and for high response driving.

Smoother Idling

When an engine is idling, firing can become particularly bad. Because Iridium Power plugs have a low required voltage and high ignitability, sparking continues to work properly during idling. Whereas normal plugs have highly variable revolution counts, Iridium Power plugs maintain very smooth idling. Also, because combustion is good, the explosive energy raises the revolution count.

Improved Engine Performance

Iridium Power spark plugs enhance the performance of an engine. Acceleration is improved when compared against normal spark plugs.

Decreased Fuel Consumption

When Iridium Power spark plugs are used, accidental fire and misfiring rarely occurs under various driving conditions. Therefore, combustion is extremely good. In turn, a healthy engine can be maintained and fuel consumption improved.