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Old 09-19-2020, 02:37 PM   #41
Ronnieroadster
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Default Re: NGK Plugs

Quote:
Originally Posted by Gezer View Post
What gap should be used on B6L NGK plugs in a EAB stock Flathead




You can use .030 or .035 both will work fine.
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Old 09-19-2020, 03:51 PM   #42
flatjack9
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Default Re: NGK Plugs

I gap at .025. Years ago I used a wider gap. Have a crab distributor and would have problems with carbon tracking in the cap. Probably poor cap quality. Tried several different brands, same thing. Dropped to .025 and have never had a problem since.
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Old 09-20-2020, 08:59 PM   #43
cajunfirehawk
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Default Re: NGK Plugs

So for my stockish 36 flatty 21 stud what p/n ngk's and what gap Gents?
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Old 09-21-2020, 06:11 AM   #44
Mart
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Default Re: NGK Plugs

I use .025" as my experience is the same as flatjack9.
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Old 09-21-2020, 08:19 AM   #45
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Default Re: NGK Plugs

As the gap is increased the energy that the coil outputs increases. At some point the coil output can exceed the insolating properties of the system. Because the of compression, most flatheads do not require that much spark energy.
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