Best spark plug for flathead with Edelbrock Heads?
Fleet Owner
Joined: Jul 2004
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From: NM
I don't have them, but from what I've read, it depends which model Edelbrock heads. You have to be careful they don't stick down too far. This was a response to a question on the Flathead Forum; it is copied from Edelbrock's site:
• SPARK PLUGS: A 14mm, 3/4” reach, gasket seat, 5/8” hex sparkplug is recommended, such as Champion RC12YC, RC14YC, or equivalent.
Heat range will vary with different combinations and conditions. Use anti-seize on spark plug threads to prevent thread galling!
I wouldn't use Champion personally, Autolite are more reliable IMO.
• SPARK PLUGS: A 14mm, 3/4” reach, gasket seat, 5/8” hex sparkplug is recommended, such as Champion RC12YC, RC14YC, or equivalent.
Heat range will vary with different combinations and conditions. Use anti-seize on spark plug threads to prevent thread galling!
I wouldn't use Champion personally, Autolite are more reliable IMO.
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GRanger86
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Aug 18, 2016 07:45 AM
