" From: Tom Jennings <tomj@xxxxxxx> " " > " Turns out I have RC12LYC Champion plugs in there. The "L" " " On Thu, 2 Nov 2006, Sandwich Maker wrote: " " > the L shouldn't matter. 12 is the heat range, and if it's a 12 it " > should be a 12. " " Well the Champion data that Edelbrock parrots says it's .060" " extended tip; why that doesn't simply translate to a higher " heat range I don't know. if it does translate to a higher heat range why isn't it -marked- with a higher heat range? my argument is that they compensate the design for the extended tip so that a 12 remains a 12. anything else would make a hash of the marking system. " > " So I've mailordered RC9YC's, and will play with timing with " > " these colder plugs when those arrive. " > " > this should be the significant change. " " Yeah, but I bet it's close. My plugs are whiteish, though not " overheating or damaged (10K miles or so). " " http://wps.com/temp/plug1.jpg " http://wps.com/temp/plug2.jpg yup. my plug reading skills are a little rusty but they look pretty good. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought _______________________________________________ AMC-List mailing list AMC-List@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list or go to http://www.amc-list.com