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It is a question concerning the IRIDIUM POWER that is often.
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| The required voltage is reduced by the use of 0.4 mm diameter center electrode. |
Recently, there has been a trend to increase the compression ratio to increase output in engines.
This means that the required voltage of spark plugs tends to increase and high compression is required in highly tuned engines.
When this occurs, the required voltage increases and, in the worst case, sparking ceases while the engine is running.
Minimization of the electrode diameter is an effective way of avoiding this.
(Refer to the answer for  .)In the IRIDIUM POWER, the center electrode has a diameter of 0.4 mm. Because required voltage is kept low, this enables the IRIDIUM POWER to be used in high performance engines and for high response driving. The following graph gives examples of required voltage measurements for IRIDIUM POWER and normal spark plugs. |
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| The required voltage in the IRIDIUM POWER is between 3 and 5 kv less than in normal plugs. |
