The Ford Barn

Ron in Quincy · 06-01-2014, 07:20 PM

I recently acquired a NOS set of Firestone RL-15 Spark Plugs. There structure is almost identical to the Champion 3X Plug except they do not have the brass top (see attached photos).

I set the gap at .030 and installed them in my Roadster which has a touring engine with a Snyder 5.5 head. The engine runs great and the plug color is fine.

Has anyone else used this type of Plug ?Any comments ?

Ron

Ron in Quincy · 06-02-2014, 01:30 PM

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Btt

06-01-2014, 07:20 PM	#1
Ron in Quincy Senior Member Join Date: May 2010 Location: Quincy, CA. Posts: 1,708	Firestone Spark Plugs I recently acquired a NOS set of Firestone RL-15 Spark Plugs. There structure is almost identical to the Champion 3X Plug except they do not have the brass top (see attached photos). I set the gap at .030 and installed them in my Roadster which has a touring engine with a Snyder 5.5 head. The engine runs great and the plug color is fine. Has anyone else used this type of Plug ?Any comments ? Ron Last edited by Ron in Quincy; 10-28-2015 at 08:16 PM.

06-02-2014, 01:30 PM	#2
Ron in Quincy Senior Member Join Date: May 2010 Location: Quincy, CA. Posts: 1,708	Re: Firestone Spark Plugs Sponsored Links (Register now to hide all advertisements) Btt