Using NGK plug in my 48 Ford

4

48fordconv

Senior Member
Which NGK plug should I use in my 48 Ford with Edlebrock Alum heads?? Also what Gap should they be set at ?/ Thanks I had this written done someplace. Had car worked on they put Champions in.
 
b4L or B6L I think the 4 is a hotter plug than the 6 (someone here will correct me on that if I have it backwards). Use factory plug gap. Maybe .028 to .032.
 
Steve, I'm using the B5HS NKGs that are a bit hotter than the B6s in my old Weiand 8.5:1 heads. NKG's lower numbers are hotter than the higher numbers. The HS plug is a bit longer reach (1/16") than the L and would probably fit the older Edlebrock heads better. My new Edelbrock heads require a 3/4" reach plug and I haven't yet found a plug recommended for these new heads.
 
Jim Arnold said:
Steve, I'm using the B5HS NKGs that are a bit hotter than the B6s in my old Weiand 8.5:1 heads. NKG's lower numbers are hotter than the higher numbers. The HS plug is a bit longer reach (1/16") than the L and would probably fit the older Edlebrock heads better. My new Edelbrock heads require a 3/4" reach plug and I haven't yet found a plug recommended for these new heads.
Click to expand...
NGK B5-ES are 3/4" length. Just right for Flatattack heads, and others.
 
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