Re: Re: Champion Spark Plugs

Posted by Jerry on January 15, 1999 at 20:17:57:

In Reply to: Re: Champion Spark Plugs posted by Male Gayle on January 13, 1999 at 12:43:20:

The larger diameter electrode of the AC plugs is a result of a plug designed for a different heat range. The smaller the electrode, the higher it's temperature will be when it is put under a load in a running engine. If a spark plug with a large diameter electrode is used in an engine that see's little or no hard use, it will not reach it's intended temperature range and therefore it can and will begin to build up deposits which would otherwise be burned off. This will lead to fouling and missing.
On the other hand, if a smaller diameter electrode is used in continuos hard loads the resulting heat buildup with burn the plug. This can also lead to secondary damage as a result of preignition or detonation. The most noticable effect of this is burned pistons.
The problem is not necassarily in the plugs but in the formulation of the gasoline and the amount of use the engine sees. Light loads or little use with quickly foul "cold" plugs and hard, long use with burn "hot" plugs. Champion has dropped from production several plug designs and substituted others in there place. Often the recommended plug is not the best for the particular use a person might have in mind.
The old adage still applies: "Hot plugs for cold engine and cold plugs for a hot engine". Regardless of brand name.
My humble opion.

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