The Ford Barn

Robert/Texas · 11-25-2016, 05:05 PM

I have an unopened box of 25 Firestone C40CF spark plugs. Are they worth using in my A's? I think they might be WWII surplus.

Gary WA · 11-25-2016, 05:36 PM

try them out Model A may like them!

Chuck Sea/Tac · 11-25-2016, 06:57 PM

There's a craigslist Fresno add for some of these. They're marked "cold, severe service" not sure what that means?

C26Pinelake · 11-25-2016, 10:49 PM

Find a plug collector and ask him what vehicle that number plug applies to. Wayne

Fullraceflathead · 11-26-2016, 12:37 PM

I'm running them in my Model A that's all stock and they run fine.

Tom Wesenberg · 11-26-2016, 03:02 PM

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Quote:

Originally Posted by Chuck Sea/Tac

There's a craigslist Fresno add for some of these. They're marked "cold, severe service" not sure what that means?

An engine that works hard will heat the plug more, so the engine usually would need a colder plug.

My Original Cub Cadet has a snow plow and I use it at fast idle, which has plenty of power to push the snow out of the way. Since this engine runs an easy life the recommended Champion J8 plug is usually black and fouls out. I need to use a hotter plug, like J9 or J10 so the plug will heat up more.

Robert/Texas · 11-29-2016, 07:36 AM

Both of my A's live easy lives cruising at 25-35. I think I'll stay with the Champions that I'm now using and try to sell the Firestones at my next swap meet trip.
Thanks, Robert

11-25-2016, 05:05 PM	#1
Robert/Texas Senior Member Join Date: May 2010 Location: Burton, Texas Posts: 681	Firestone Sparkplugs I have an unopened box of 25 Firestone C40CF spark plugs. Are they worth using in my A's? I think they might be WWII surplus.

11-25-2016, 05:36 PM	#2
Gary WA Senior Member Join Date: May 2010 Location: Clinton,WA/Whidbey Island Posts: 4,105	Re: Firestone Sparkplugs try them out Model A may like them! __________________ www.whidbeymodelaclub.com

11-25-2016, 06:57 PM	#3
Chuck Sea/Tac Senior Member Join Date: May 2010 Location: Between Seattle & Tacoma Posts: 2,354	Re: Firestone Sparkplugs There's a craigslist Fresno add for some of these. They're marked "cold, severe service" not sure what that means?

11-25-2016, 10:49 PM	#4
C26Pinelake BANNED Join Date: May 2010 Location: Michigan / Ontario border, Sarnia, Ontario. 50 miles from Detroit and 150 from Toronto. Posts: 5,800	Re: Firestone Sparkplugs Find a plug collector and ask him what vehicle that number plug applies to. Wayne

11-26-2016, 12:37 PM	#5
Fullraceflathead Senior Member Join Date: May 2012 Location: Chillicothe, Missouri Posts: 1,176	Re: Firestone Sparkplugs I'm running them in my Model A that's all stock and they run fine. __________________ "If I asked people what they wanted they would have said faster horses." -Henry Ford "Primitive technology is not a design flaw" 1928 Ford Model A Roadster Pickup 1930 Gordon Smith Air Compressor 1941 Willy's Pickup 1960 Thunderbird-For Sale 1964 Buick Riviera 2x4 425 1965 Pontiac GTO, 455 Super Duty 2004 Dodge Ram SRT-10, V-10 Viper 1977 Charger Jet Boat,460 Ford,Jacuzzi Jet Front Engine Nostalgia Dragster,Supercharged 296 "Fullrace Flathead" Ford Engine Build up on DVD ask

11-29-2016, 07:36 AM	#7
Robert/Texas Senior Member Join Date: May 2010 Location: Burton, Texas Posts: 681	Re: Firestone Sparkplugs Both of my A's live easy lives cruising at 25-35. I think I'll stay with the Champions that I'm now using and try to sell the Firestones at my next swap meet trip. Thanks, Robert