Thanks for the help. I've noticed the plating burn you mention, but only across the ground electrode. SHould the color change extend to the thread portion as well? and if so, when?
I haven't been here in a while,need some basic help. Running a 355" SBC on alky, Mechanical injection.When runing in the Texas heat 95+ degrees, started leaning out the engine ,kept going faster every time. This weekend , temps dropped into mid 50's, car slowed down. Should I lean it some more...