Quote:
Originally Posted by 350TSS
"...If you add in a bigger plug gap the coil barely pushes out enough juice to jump the gap...
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I think that's true if you have larger gaps on standard plugs but, as I understand it, the narrower electrode on iridium plugs means less voltage is needed to jump any given gap. So the larger recommended gap shouldn't take any more voltage than with a standard copper plug.
This from
http://www.sparkplugs.co.uk/iridium-spark-plugs/
"... The narrow diameter concentrates the electrical charge and therefore a much lower voltage is required to jump the spark gap. This is beneficial in several ways:
• A lower voltage is required, this reduces load on a vehicle's ignition system (less strain = less chance of failure)
• A larger gap can be supported without increasing load on the ignition system (Larger gap = larger spark = more efficient combustion)..."