The Ford Barn

Jerry in Shasta · 04-27-2014, 10:59 AM

What spark plug is recommend for a repo Thomas head, 6.7 compression? Mostly local driving.
Thanks
JB

Jim/GA · 04-27-2014, 11:47 AM

This will generate a lot of responses, kind of like asking about which motor oil to use.

This is a very charged topic.

Snyder's says use Champion RC12YC plugs (14 mm plug) on the 7:1 compression version of this head that they sell.

YMMV.

glenn in camino · 04-27-2014, 07:24 PM

Sponsored Links (Register now to hide all advertisements)

I have a 7-1 Thomas head on my modified B engine. I'm using Champion RC12YC plugs. It runs strong.

04-27-2014, 10:59 AM	#1
Jerry in Shasta Senior Member Join Date: Jun 2010 Location: (Old)Shasta (Redding) CA Posts: 385	Spark Plug suggestions Please What spark plug is recommend for a repo Thomas head, 6.7 compression? Mostly local driving. Thanks JB

04-27-2014, 11:47 AM	#2
Jim/GA Senior Member Join Date: May 2010 Location: Young Harris, GA Posts: 1,815	Re: Spark Plug suggestions Please This will generate a lot of responses, kind of like asking about which motor oil to use. This is a very charged topic. Snyder's says use Champion RC12YC plugs (14 mm plug) on the 7:1 compression version of this head that they sell. YMMV. __________________ Jim Cannon Former MAFCA Technical Director "Have a Model A day!" Last edited by Jim/TX/GA; 04-28-2014 at 12:29 AM.

04-27-2014, 07:24 PM	#3
glenn in camino Senior Member Join Date: May 2010 Location: Camino, CA. Posts: 3,086	Re: Spark Plug suggestions Please Sponsored Links (Register now to hide all advertisements) I have a 7-1 Thomas head on my modified B engine. I'm using Champion RC12YC plugs. It runs strong.

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