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sparkplugs.com · 06-13-2006, 04:15 PM

As far as the dyno results are concerned, there was a slight difference on the performance between the iridium and standard nickel (aka copper) plugs, but nothing extremely drastic (he never sent me the charts so i could pull numbers). The main difference you'll see between the two plugs is longivity, and perhaps better idling. (i noticed better idling and acceleration) As far as technology is concerned, iridium fine wires are still the best plug out there. Iridium plugs only have to be changed every 60-90k miles (manufacturers claim 60k, but i've run them to 90k & beyond without a problem) where as copper plugs run for about 30k. Most people base their decision on how often they want to change their plugs out, and that will usually compensate for the extra expense of buying iridiums (except for the guys that have to put 16 plugs in their hemis)

06-13-2006, 04:15 PM	#13 (permalink)
sparkplugs.com Supporting Vendor (Gold) iTrader: (1) Join Date: Oct 2005 Posts: 57 Thanks: 0 Thanked 0 Times in 0 Posts	Re: What Is Iridium? As far as the dyno results are concerned, there was a slight difference on the performance between the iridium and standard nickel (aka copper) plugs, but nothing extremely drastic (he never sent me the charts so i could pull numbers). The main difference you'll see between the two plugs is longivity, and perhaps better idling. (i noticed better idling and acceleration) As far as technology is concerned, iridium fine wires are still the best plug out there. Iridium plugs only have to be changed every 60-90k miles (manufacturers claim 60k, but i've run them to 90k & beyond without a problem) where as copper plugs run for about 30k. Most people base their decision on how often they want to change their plugs out, and that will usually compensate for the extra expense of buying iridiums (except for the guys that have to put 16 plugs in their hemis)