NKau Founding Member Dec 15, 2001 1,346 0 37 Jefferson, WI Aug 7, 2007 #1 Aug 7, 2007 #1 Hey guys. Like the title says, I have a stock rebuilt shorblock (9.0:1 compression, or whatever is stock), n/a engine. Wondering what my best replacement plug would be. Thanks.
Hey guys. Like the title says, I have a stock rebuilt shorblock (9.0:1 compression, or whatever is stock), n/a engine. Wondering what my best replacement plug would be. Thanks.
M Mike92GT Founding Member Jan 23, 2002 583 0 0 Florida Aug 7, 2007 #2 Aug 7, 2007 #2 I got this from the Edelbrock Tech Dept. I would go with the Autolite 3924 unless you have a power adder, then I would run a 3923 (colder) SPARK PLUGS FOR AUTOMOTIVE Under 9 to 1 Compression Champion ---------- RC12YC / 2071 NGK --------------- FR 4 / 5155 OR BCPR5ES / 6130 Autolite ------------ 3926 Motorcraft --------- AGSFP52 Up to 10.5 to 1 Compression Champion ----------- RC9YC / 2075 Autolite -------------- 3924 NGK ----------------- FR 5 / 7373 OR BCPR7ES / 3330 11 to 1 Compression Champion ------------ C63YC / 796 NGK ------------------ R5672A-8 / 7173 12 to 1 Compression Champion ------------- C61YC / 785 NGK ------------------- R5672A-9 / 7405 13 to 1 Compression Champion -------------- C59C / 771 NGK --------------------- R5671A-9 / 5238
I got this from the Edelbrock Tech Dept. I would go with the Autolite 3924 unless you have a power adder, then I would run a 3923 (colder) SPARK PLUGS FOR AUTOMOTIVE Under 9 to 1 Compression Champion ---------- RC12YC / 2071 NGK --------------- FR 4 / 5155 OR BCPR5ES / 6130 Autolite ------------ 3926 Motorcraft --------- AGSFP52 Up to 10.5 to 1 Compression Champion ----------- RC9YC / 2075 Autolite -------------- 3924 NGK ----------------- FR 5 / 7373 OR BCPR7ES / 3330 11 to 1 Compression Champion ------------ C63YC / 796 NGK ------------------ R5672A-8 / 7173 12 to 1 Compression Champion ------------- C61YC / 785 NGK ------------------- R5672A-9 / 7405 13 to 1 Compression Champion -------------- C59C / 771 NGK --------------------- R5671A-9 / 5238
NKau Founding Member Dec 15, 2001 1,346 0 37 Jefferson, WI Aug 8, 2007 #3 Aug 8, 2007 #3 Gettin' the 3924's. Thanks.