> The handbook for my Riley ('48 RMA) specifies
> Champion L10S sparking plugs. Assuming this plug is no
> longer called this (or no longer made) can someone
> provide cross-references for either newer Champs or
> other brands ?
My MG PA calls out something like KLG L.K.1's (Yea, right!) which I think
also crossed to or listed somewhere as Champ L10's, which are 14mm, 1/2"
reach.
It had L7's installed when I got it. Neither could I find. I called
Champion's Racing support on this one. (800-537-8984) They suggested L90C ,
or maybe L82C, which is colder. I think L87C are also a 1/2" plug, I'd have
to check my plug applications booklet. (And, I'd have to look and see what
#'s actually in there)
Hot vs Cold
A hot plug has it's electrode farther from the body (less ceramic), so it
retains heat better. A cold plug has more material to sink the heat away
faster, keeping it cooler. This is all while retaining the same electrode
"reach"- the length from the base of the seal to the end of the electrode.
You use a colder plug when you're running an engine hard, like racing, to
keep the plugs from overheating, and a hotter plug can be used in low stress
situations- like they help overcome oil fouling on my old 6V-coil, need rings
Ford tractors.
Regarding Champion quality- I've heard numerous tales about broken,
fractured, or otherwise defective plugs on a regular basis, even from the
places that make money selling them. High return rate. NGK's are generally
regarded as higher quality. I have NGK's in many of my cars, including the
race Bugeye. I do have Champs in the PA, as I couldn't find a cross for
this range of plugs.
________________________________________________________
Roger Garnett (Roger_Garnett@cornell.edu)
"The South Lansing Centre For Wayward Sports Cars"
"All donations of stray, orphaned, odd, neglected, etc.
sports cars and bits in need of a good home accepted."
"The drop off bin is right there- behind the barn..."
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