 Strange Spark Plugs, OK to Use? |
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| jrrobertson |
 Feb 8 2025, 11:39 AM
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#1
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Member  Group: Members Posts: 51 Joined: 28-December 16 From: Wolverine Lake , Michigan Member No.: 20,704 Region Association: Upper MidWest 
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These spark plugs came with an engine I am rebuilding. What are they and is there any benefit to this type of plug?
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| Superhawk996 |
Feb 8 2025, 10:33 PM
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#2
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914 Guru Group: Members Posts: 7,028 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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This is sort of a weird one. I didn’t look up online but it almost looks like another iridium center electrode?
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| emerygt350 |
Feb 9 2025, 12:59 PM
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#3
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Advanced Member Group: Members Posts: 2,883 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
QUOTE(Superhawk996 @ Feb 8 2025, 11:33 PM)  This is sort of a weird one. I didn’t look up online but it almost looks like another iridium center electrode? I think so, it just has ceramic all the way up, very odd. maybe it keeps the spark between the very tip. I could imagine the OPs might be sparking all kinds of strange places. I would think all of those extra surfaces inside your chamber can only lead to badness in the end. |
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| Superhawk996 |
Feb 9 2025, 01:26 PM
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#4
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914 Guru Group: Members Posts: 7,028 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(emerygt350 @ Feb 9 2025, 02:59 PM) I think so, it just has ceramic all the way up, very odd. maybe it keeps the spark between the very tip. I think you are in on right track. That design keeps the spark jumping the gap at the very tip and will largely have the flame kernel starting (orange) outside the ground to electrodes and won’t quench the flame as much as the OPs plug design will. Iridium largely shielded by the ceramic to limit where the spark can jump (red zone).  Decent link: https://www.autolite.com/knowledge-base/pos...ode-spark-plugs |
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Posts in this topic
jrrobertson Strange Spark Plugs Feb 8 2025, 11:39 AM
Superhawk996 Dump that :stromberg:
Multi electrode spark plu... Feb 8 2025, 11:58 AM
SirAndy It was a dumb aftermarket idea that never really p... Feb 9 2025, 01:35 PM emerygt350 My mini requires a plug that looks like that from ... Feb 8 2025, 12:07 PM Superhawk996
My mini requires a plug that looks like that from... Feb 8 2025, 12:28 PM emerygt350 Yeah, they stopped using the outsourced 4 I bet. ... Feb 8 2025, 04:28 PM technicalninja
It was a dumb aftermarket idea that never reall... Feb 9 2025, 02:07 PM Superhawk996
It was a dumb aftermarket idea that never real... Feb 9 2025, 02:27 PM |
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