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[QUOTE="Rich Rohrich, post: 1275133, member: 16241"]
There is a potential advantage for running the EGV series plugs rather than the newer style fine wire like the EIX or EVX.

It has been my [b]personal experience[/b] over the years that running an EGV or similar gold based plug buys you a margin of safety when you are trying to tune to the ragged edge. The melting point of the gold center electrode (and good copper core plugs) is very close to the temps seen during severe detonation.

If the engine suddenly starts to knock hard enough the center electrode tends to burn out and shut the cylinder down before it does any real damage. It acts sort of like a fuseable link. It's something I learned running air-cooled turbocharged street/drag bikes. It saved a few motors over the years.

The platinum tip in the EVX and EIX plugs melts at a temp nearly 1300 degrees (F) higher than the gold or copper plugs so it will hang in and let the engine frag itself before it will stop firing. The upside is the EIX and EVX plugs will tend to last a really long time in part because of this melting point difference. They tend to erode at a much slower rate than the EGV or copper core plugs.
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