Plug gap y block
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From: AKRON ohio
Last edited by bigwin56f100; Dec 11, 2025 at 10:37 AM.
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From: W (BY GOD) V
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From: Western NY
I wouldn't get too caught up on the gap as long as you are within the specified range and are satisfied with how things are running. The 0.34 is spot on according to Van Pelt:
Ford Tuneup Specifications for 1954-59 V8 Engines
Usually the gaps are specified as a range, and traditional wisdom says to try to aim for the smaller side of things as the gap will naturally grow with wear. It is also said that leaning towards the larger gap can lead to better fuel efficiency. A wider gap also can retard ignition timing. I'm sure there is a whole science to this all, but again, I wouldn't get all caught up in it all unless you are racing or similar.
Ford Tuneup Specifications for 1954-59 V8 Engines
Usually the gaps are specified as a range, and traditional wisdom says to try to aim for the smaller side of things as the gap will naturally grow with wear. It is also said that leaning towards the larger gap can lead to better fuel efficiency. A wider gap also can retard ignition timing. I'm sure there is a whole science to this all, but again, I wouldn't get all caught up in it all unless you are racing or similar.
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If it ain't broke, don't fix it is always a good rule to follow. The neat thing about plug gap is you can play with it and see what happens with no consequences. It either works better or it doesn't, and you can always put it back if you don't like the results in about 15 minutes.
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From: W (BY GOD) V
With the IGN II and III, you will be running hotter coil(s) and can increase gap (hotter/longer spark) as was done with DURASPARK allowing running a fatter fuel curve and a colder plug.
The FYB ran MOTORCRAFT BF-82 which is a hot plug.
The FYB ran MOTORCRAFT BF-82 which is a hot plug.
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