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Registered
Join Date: Jun 2011
Location: Reston, VA
Posts: 338
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Spark plug gap for 73.5?
What is the correct spark plug gap for a 73.5 engine that is bone stock? The plugs below (NGK BP6ES) have about 1k miles on them and were gapped at .028". Rechecking the WSM, it appears that the recommended gap "back in the day" was between .55-.70mm (.022-.028"). What is considered best practice now? Am I still ok with .028"?
 
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--Richard 1965 356 SC Coupe |
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11-04-2013, 10:31 AM
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Functionista
Join Date: Jul 2011
Location: CO
Posts: 7,717
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I think .024 is correct though I'm not near my books at the moment. I don't think .028 will give you any issues though.
Your plugs look to be burning correctly for CIS by the way.
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Jeff 74 911, #3 I do not disbelieve in anything. I start from the premise that everything is true until proved false. Everything is possible. |
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11-04-2013, 01:23 PM
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Location: Reston, VA
Posts: 338
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Thanks for the info Jeff. I was hoping someone would comment on the plugs :-)
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--Richard 1965 356 SC Coupe |
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11-04-2013, 04:17 PM
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Join Date: Apr 2012
Location: Edmonton
Posts: 419
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I have .55mm (.022") listed for Platinum plugs and .70mm (.028") for non-platinum plugs
I'm sure .028" would be fine with those plugs |
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11-04-2013, 05:32 PM
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Registered
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Location: Reston, VA
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Thanks jrbennett.
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11-05-2013, 02:58 AM
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