Tell me about the ignitability of the IRIDIUM TOUGH.
Use of 0.4mm dia. iridium center electrode has enabled us to achieve previously unparalleled ignitability in the IRIDIUM TOUGH.
Ordinarily, the leaner the air mix the more difficult the ignition.
The greater the ignitability limits, that is the leaner the air mix in which a plug can spark, the better ignitability a plug is said to have.
The following graph shows some examples of ignitability limits for various spark plugs.
With spark gap set to 0.8mm, the air-fuel mixture ignitability limit for IRIDIUM TOUGH is 2.0 points higher than a normal spark plug. This high ignitability improves idling stability and acceleration performance through correct firing even under running conditions that easily cause poor igniting performance at idling or acceleration.