Camshafts and Compression

Newbomb Turk said
The plug looks cold to me.

And it’s not lean. At least at idle and cruise. No one can see from those pictures what the tune up is like at WOT.

Yeah, I couldn’t get a great photo there. It does look slightly richer toward the bottom of the porcelain.

I do have a set of plugs one heat range hotter to try. Good news is there’s no ping or flat spot. Didn’t get over 170f in traffic, good signs.