FRPP SCJ Head Spark Plug - 460 Ford Forum
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post #1 of 5 (permalink) Old 09-10-2019, 02:55 PM Thread Starter
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FRPP SCJ Head Spark Plug

I've read multiple posts that the Autolite AR3934 is the plug to use. Only problem is that these are rare in Canada. Is there an NGK equivalent?

T120r
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post #2 of 5 (permalink) Old 09-10-2019, 03:29 PM
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Cool

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Originally Posted by t120r View Post
I've read multiple posts that the Autolite AR3934 is the plug to use. Only problem is that these are rare in Canada. Is there an NGK equivalent?
3924 is the projected tip plug which is fine unless using boost or NOX.

3934 is the race plug for boost, NOX or high static c/r in a racing environment.



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post #3 of 5 (permalink) Old 09-15-2019, 04:54 AM Thread Starter
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3924 is the projected tip plug which is fine unless using boost or NOX.

3934 is the race plug for boost, NOX or high static c/r in a racing environment.



SJ
used 2b RHP



Ooops, maybe I should have specified. Finding Autolites in Canada is extremely hard. Was hoping for an alternate NGK or Bosch part number that would be the same.

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post #4 of 5 (permalink) Old 09-15-2019, 07:43 AM
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Try this.............

https://i.imgur.com/1cKLYoo.jpg

Cheers, Bob
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post #5 of 5 (permalink) Old 09-15-2019, 10:29 PM Thread Starter
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Try this.............

https://i.imgur.com/1cKLYoo.jpg

Cheers, Bob
Thank You. That's a great chart.

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