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Does anyone know if NGK makes racing spark plugs for Ford 2300 heads? I checked their website and could not find any. We have been running their plugs but they are listed as standard plugs.
Thanks for any help
TC65
Foghorn
01-05-2015, 10:36 PM
You could try an NGK Iridium IX . NGK calls them "Extreme Performance".
trone12x
01-06-2015, 03:03 PM
Dont know about ngk. But autolite has a dirert cross for the RS9YC in a racing plug. Its the AR103
I think the ones we are using are the R5724-x. I know we went to a colder plug later in the season so without pulling the plug from the car I will not know for sure.
CRP Racing Products
01-08-2015, 07:29 PM
Yes the NGK plug is R5724-8
Big E tech
01-09-2015, 11:22 AM
The R5724-8 is a projected tip plug.
If you have a head where the plug is close to the deck or piston, you can go with a NGK DCPR7E or NGK BR7EFS
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