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Old 11-20-2019, 10:55 PM   #21
Tinker
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Default Re: Spark plug preference...Curious

Use raja ends, so autolite plugs removable ends, works for me 216 or 218 18mm, I can look up the plug to be certain... (in 14mm it's like 486 for autolite). NKG doesn't make them that I know of with screw tops.


Could go with a hotter plug then the champion h10. The new plugs have good reviews. But let us know!!!

Last edited by Tinker; 11-20-2019 at 11:04 PM.
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Old 11-20-2019, 11:09 PM   #22
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Default Re: Spark plug preference...Curious

I run a 12V System so not a prob, I know lotís donít but first thing I did was convert to 12V. Bought a blue tooth radio AM/FM & will play music from my iPhone. Havenít installed yet but bought Autolite 3924 resistor type JIC of electronic interference.
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Old 11-21-2019, 08:25 AM   #23
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Default Re: Spark plug preference...Curious

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Originally Posted by Ronnieroadster View Post
The best choice of plug for your Flathead as others have mentioned is the NGK B4L or B6L the NGK plug works perfectly for stock as well as modified applications being 6 or 12 volt neg or positive ground has no effect over the spark plugs performance. The Autolite 216 is a second choice but is in no way as good as the NGK . Champion plugs being made in mexico are prone to failure so what ever you do stay away from that brand. Ask your NAPA salesman for the B6L plug no need to try and figure out the part number.
Ronnieroadster.
Thank you Ronnieroadster, the exact information I was looking for!!!
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Old 11-21-2019, 02:17 PM   #24
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Default Re: Spark plug preference...Curious

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Thank you Ronnieroadster, the exact information I was looking for!!!


Your welcome
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Old 11-21-2019, 07:55 PM   #25
Bored&Stroked
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Default Re: Spark plug preference...Curious

Quote:
Originally Posted by AnthonyG View Post
I run a 12V System so not a prob, I know lotís donít but first thing I did was convert to 12V. Bought a blue tooth radio AM/FM & will play music from my iPhone. Havenít installed yet but bought Autolite 3924 resistor type JIC of electronic interference.
I have a magneto with solid core wires . . . you can probably pick me up on your radio from where you are at now! LOL
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Old 11-21-2019, 08:33 PM   #26
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Default Re: Spark plug preference...Curious

Well,I guess rockfla has enough responses to confuse him.
Now let's move on to a new subject:
what oil to use in a flathead?
or, who is more passionate? blonds, brunettes, blackhair or redheads LOL
John
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Old 11-21-2019, 09:42 PM   #27
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Default Re: Spark plug preference...Curious

good deals on the ngk's at ebay
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