The Ford Barn

Ronnieroadster · 09-19-2020, 02:37 PM

Quote:

Originally Posted by Gezer

What gap should be used on B6L NGK plugs in a EAB stock Flathead

You can use .030 or .035 both will work fine.

flatjack9 · 09-19-2020, 03:51 PM

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.

cajunfirehawk · 09-20-2020, 08:59 PM

So for my stockish 36 flatty 21 stud what p/n ngk's and what gap Gents?

Talkwrench · 04-21-2021, 07:00 PM

Quote:

Originally Posted by cajunfirehawk

So for my stockish 36 flatty 21 stud what p/n ngk's and what gap Gents?

I have electronic ignition and run .028 with NGK plugs

Mart · 09-21-2020, 06:11 AM

I use .025" as my experience is the same as flatjack9.

JSeery · 09-21-2020, 08:19 AM

Sponsored Links (Register now to hide all advertisements)

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.

Gezer · 04-21-2021, 10:00 AM

Thanks for all the comments.
When I put the NGk plugs in my 51 EAB stock engine, they ran very well for a few miles. Now I am getting a "fuzzy" carbon build up on the plugs causing power loss.
What gap are you all using? What else would you suggest I check out?
Thanks in advance for the help.

09-19-2020, 03:51 PM	#2
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,600	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.

09-20-2020, 08:59 PM	#3
cajunfirehawk Senior Member Join Date: Jul 2018 Location: Ms GulfCoast Posts: 238	Re: NGK Plugs So for my stockish 36 flatty 21 stud what p/n ngk's and what gap Gents? __________________ Regards, Todd 1936 FORD Tudor Slantback "cajunhotrodder" on instagram/youtube

09-21-2020, 06:11 AM	#5
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 9,084	Re: NGK Plugs I use .025" as my experience is the same as flatjack9.

09-21-2020, 08:19 AM	#6
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: NGK Plugs Sponsored Links (Register now to hide all advertisements) 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.

04-21-2021, 10:00 AM	#7
Gezer Member Join Date: Apr 2016 Posts: 99	Re: NGK Plugs Thanks for all the comments. When I put the NGk plugs in my 51 EAB stock engine, they ran very well for a few miles. Now I am getting a "fuzzy" carbon build up on the plugs causing power loss. What gap are you all using? What else would you suggest I check out? Thanks in advance for the help.