The Ford Barn

M2M · 05-12-2019, 09:00 PM

Champion 3X plugs had a skirt around the central electrode while their replacement the Champion C4 had no skirt.

Why did they go "nude"? What works better?

Example of plugs with skirt:

Example of plugs without skirt:

jhowes · 05-13-2019, 08:14 AM

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I think this has to do with the heat range of the plug, but I am not a spark plug guy so maybe someone that knows will chime in. Jack

05-12-2019, 09:00 PM	#1
M2M Senior Member Join Date: Jul 2012 Location: Australia/USA/EU/Soviet Russia Posts: 1,105	Skirts or no skirts? Spark Plug question not... Champion 3X plugs had a skirt around the central electrode while their replacement the Champion C4 had no skirt. Why did they go "nude"? What works better? Example of plugs with skirt: Example of plugs without skirt: __________________

05-13-2019, 08:14 AM	#2
jhowes Senior Member Join Date: Jul 2010 Location: upstate NY near Mass border Posts: 789	Re: Skirts or no skirts? Spark Plug question not... Sponsored Links (Register now to hide all advertisements) I think this has to do with the heat range of the plug, but I am not a spark plug guy so maybe someone that knows will chime in. Jack