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Y-Blockhead · 10-27-2019, 07:44 PM

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The 3x are about equal to the W-18 according to this info on Ford Garage. I'm running the W18's now, they seem to run better than the 3X with a 5.5 head (cheaper too!). The 3X seemed too hot for my setup.

Also the W-16-Y should be cooler then W-18 according to this info.

http://www.fordgarage.com/pages/brum...kplugnotes.htm

10-27-2019, 07:44 PM	#6
Y-Blockhead Senior Member Join Date: Jul 2011 Location: Redondo Beach, CA Posts: 5,849	Re: Champion 3xs or other plugs? Sponsored Links (Register now to hide all advertisements) The 3x are about equal to the W-18 according to this info on Ford Garage. I'm running the W18's now, they seem to run better than the 3X with a 5.5 head (cheaper too!). The 3X seemed too hot for my setup. Also the W-16-Y should be cooler then W-18 according to this info. http://www.fordgarage.com/pages/brum...kplugnotes.htm Last edited by Y-Blockhead; 10-27-2019 at 11:10 PM.