1957 spark plugs

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Jan 1, 2021 | 06:59 PM

ivmachine

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Joined: Feb 2012

Posts: 76

From: Pittsburgh, PA

1957 spark plugs

I want to change out my spark plugs on my ‘57 98 with J-2 to NGK iridium. I’m seeing conflicting info on the gap. Is it 0.030” or 0.035”?

Jan 1, 2021 | 08:12 PM

oldcutlass

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Joined: Oct 2009

Posts: 42,521

From: Poteau, Ok

Either gap will work, a larger gap produces a bit higher voltage spark.

Jan 2, 2021 | 09:30 AM

ivmachine

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Joined: Feb 2012

Posts: 76

From: Pittsburgh, PA

Thanks I’ll try the 0.035 and see how she runs.

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