Ford Mustang Forum banner

1 - 3 of 3 Posts

·
Registered
Joined
·
3 Posts
Discussion Starter #1
Hi,
I'm new to the site and would like to know what spark plugs I should use in my 347 Stroker. No Nitrous, Would Junoir heads and 700 Holley double pumper carb.
Thanks
Mike
 

·
Registered
Joined
·
90 Posts
I've tried a few different types over the years and always come back to the same conclusion that the stock style copper plug always worked best. I would go with the motorcraft or autolite copper plug. Unless you were running or shooting nitrous than I would say drop the heat range and change the gap to .035. Since your not the stock setup is best.
 

·
Registered
Joined
·
1,456 Posts
What plug dimensions does it take for those heads? If it's like most other aftermarket heads, use Autolite 3924's unless you have really high compression, boost, or nitrous, then i'd say start with a 3922.
 
1 - 3 of 3 Posts
Top