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Tinker · 12-08-2020, 01:25 AM

I'm guessing you mean on the engine side. Short runs will build up more so, then when you are running it up to temp. Fouling is usually a rich mix. Best is a brown plug but to be honest I don't ever see one. But if it never leaves the driveway, that won't help. I'm not bashing, as I don't run around the country putting 1ks on my flatheads every week.

12-08-2020, 01:25 AM	#2
Tinker Senior Member Join Date: May 2010 Location: MN Posts: 7,063	Re: Carbon on porcelin of plugs,flathead V8 I'm guessing you mean on the engine side. Short runs will build up more so, then when you are running it up to temp. Fouling is usually a rich mix. Best is a brown plug but to be honest I don't ever see one. But if it never leaves the driveway, that won't help. I'm not bashing, as I don't run around the country putting 1ks on my flatheads every week.