Old-Raptor-guy
FRF Addict
I just install those same plugs a couple weeks ago.View attachment 462163Must be spark plug season… Bought these Ruthenium plugs when my last coil went out a couple months ago, but never had time to install ‘em until today.
View attachment 462164
Interesting little bump/extension on the ground side; thought it was a manufacturing defect when I saw the first one as I was checking the gap, but they all have it. Will pull a couple of these in a couple weeks to check on wear:
View attachment 462165
The old ones look pretty good for almost 50K miles on ‘em:
View attachment 462166
The "bump/extension " is the piece of ruthenuiem welded to the ground conductor. The ground conductor is cut back to try and unshield the spark/flame kernel, to promote a more even burn. This is an OLD hotrodder trick good for 5-10 hp 50 years ago.
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