spark plug gap

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moparwedden

moparwedden

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440 10-1 Compression, Est 500-550 HP, Stock Electronic E. NGK Plugs, Eddy Performer RPM Heads. What Is A good Starting Point To Gap My Plugs, Researched It But Its All Over The Map. Street Car But Will See Some Track Time In The Future.
 
What ignition?

No matter what you have, start @ .045, .010 larger than stock and go up from there until you have a miss in the firing. Then back it down. Start with .010 jumps in gap, then back down .005 until it runs smooth. The track is your best friend for this unless you can afford a dyno.
 
I run the RPM heads on my sb(10.5 to 1) and normally run a .045 gap.Been doing some reading and Edelebrock states a .050-.060 gap so upped mine to .050.I run Autolite AR 3934 plugs.I have to order through NAPA as they don,t stock them here(Toronto area).Good luck John.
 
pettybludart said:
I run the RPM heads on my sb(10.5 to 1) and normally run a .045 gap.Been doing some reading and Edelebrock states a .050-.060 gap so upped mine to .050.I run Autolite AR 3934 plugs.I have to order through NAPA as they don,t stock them here(Toronto area).Good luck John.
Click to expand...
So I'll Start At 50 Then.
 
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