superdave Posted May 13, 2007 Posted May 13, 2007 Spark_Plugs.htmhere is some useful information on spark plugs. Quote
RUn2it Posted May 15, 2007 Posted May 15, 2007 (edited) Since this was from 1977 you might be cautious, the pump gas these days has so many additives (smog) it's difficult to get a "reading" due to the clean burn properties, and it mentions lead deposits so some of the info is prior to 1977 I think. Anyway here is the URL for that site if anyone wants it http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.html, PS, I believe it's referring to 4-stroke plugs too. Here's a site that was updated in '05, it links to the same plug color chart but has an in depth analysis of plugs, and it's a 4-stroke article also. http://www.4secondsflat.com/Spark_plug_reading.html Edited May 15, 2007 by RUn2it Quote
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