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Originally Posted by Gelf
Just ordered some Denso Iridium plugs to replace my Bosch 3 earth electrode plugs.
Standard plug gap is supposed to be 0.8mm / 1.0mm, which is probably where it was before i reduced them.
Anyways, Denso Iridium plugs are claimed to require at least 5000 volts less for the spark to jump the standard electrode gap.
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I am not really an expert on plugs, all I could remember it when I was playing with engine some five to six years ago, a standard plug is fine. I used to use get the single electrode type and I can play with the gaps easily. I rerely used the cold plugs because it fouled so easily.
These day, there are some many choices but as far as an engine's point of view, thery all work equally well.
It will be entirely up to you what plug is most suitable for you, but please before spending out a great deal of money just try the typical commercial low cost ones- you may be pleasantly surprised.