Post by
Tastyratz »
https://forums.nicoclub.com/tastyratz-u8599.html
Thu Aug 28, 2003 8:51 pm
iridiums are plugs that burn more of the fuel in the cylinder, require less voltage to spark, and can spark at LEANER air/fuel mixtures. iridiums have a much smaller electrode which creates a much smaller "hot spot" a copper plug produces a much better spark than a platinum plug, platinum plugs just last longer and thats what their true advantage is. iridiums properties far surpass platiums, as a metal Ir has 2 3/32 micro ohms per sq. inch, and platinum has 4-11/64 micro ohms resistance. obviously plug design and manufacturing process plays a very large roll, (a really expensive well designed platinum plug might outperform a 75cent copper) but that was just a generic comparison. please do your research on things before spreading mis-information, google is your friend. i thought id try to squelch that argument, this is a useful thread and id like it to stay on topic.