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  • July 22, 2019, 02:50:03 AM

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Author Topic: Nelson Plugs  (Read 699 times)

Offline Jim Damerell

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Nelson Plugs
« on: May 14, 2019, 07:28:29 AM »
I will ask this question here, hoping someone here will know. How do you tell the difference between a Nelson Hot, and an HD? I have been told the shape of the tip is different, a ball on the hot, a point on the HD. I have also been told the bore around the element is bigger on the HD. I have just bought Hot plugs from a reputable vendor, and they have the small (.090) bore and the pointed tip. Is there a way to check the resistance?
Any help?

Offline Motorman

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Re: Nelson Plugs
« Reply #1 on: May 14, 2019, 10:52:54 AM »
Look at the wrench flats. The regular plug has plain wrench flats and the HD has a groove around the middle of the wrench flats. Personally I've never seen much difference between the two in racing engines. Uncle Henry once told me the plugs are comparable to K&B 1L and K&B HP, the difference being the HP has a stronger seal for high performance 65 speed engines ect.


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Offline kenneth cook

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Re: Nelson Plugs
« Reply #2 on: May 14, 2019, 02:35:36 PM »
          You can also identify the difference of the opening where the element is located. The hot plug has a larger opening.


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