which spark plugs for Edelbrock 6039's

[NKau]

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.

 

[Mike92GT]

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]

Gettin' the 3924's. Thanks.