1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Gapping 4-prong RE Plugs?!?!

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Old 05-08-08 | 04:43 PM
  #1  
7aull's Avatar
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Gapping 4-prong RE Plugs?!?!

Well D-UH!
HTF do you gap these little 4-prong bastids??
AND: do they NEED to be gapped fresh out of the box?
Mine (BR8EQ-14 NGKs) are factory gapped at something like .05 inches
Racing Beat recommends .020-
So I am banging away on each prong against a metal bench thinking:
"...there has GOT to be a better way!?"

Any info to this Back-Yard Mechanic wanna-be appreciated!
Stu Aull
80GS
Alaska
Old 05-08-08 | 05:02 PM
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Anex 570's Avatar
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You're not supposed to gap them, and I've never had to gap any NGK plug from the box because they protect them very well. I have checked them, but for the beefy *** 4 prong, you don't want to touch them, unless you have some special tool that'll do it without breaking haha.
Old 05-08-08 | 05:14 PM
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'84-12A-GSL's Avatar
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I've never heard of anybody gapping a multi-prong plug. But maybe it's possible, that's a good question. Im guessing they need no gapping though.
Old 05-08-08 | 05:18 PM
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BlackWorksInc's Avatar
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My understanding of these multi-prong spark plugs was that they do not need to be gapped because they will last slightly longer. This is due in part to the fact that there are four prongs which will attract the spark evenly; so when one prong gets to short, the spark jumps to the next closest prong, ect...

Again, that was my understanding though I may be wrong.
Old 05-08-08 | 07:05 PM
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7aull's Avatar
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I put 'em in as-is - seem to work just fine -
The REAL puzzle is why Racing Beat recommends the re-gap if its impossible to do??
I'll ask them-
Thanks!!
Stu Aull
80GS
Alaska
Old 05-08-08 | 07:15 PM
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re-gap the single prong ground electrode spark plugs. that's what their gapping specs are for.

never had to regap a multi ground electrode

never had to regap a surface fire ground electrode (how can I)?

pop em in right outta the box with a little anti-seize on the threads and you're good to go!!
Old 05-08-08 | 11:53 PM
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Spark gap is determined by the capability of the firing circuit.

For points type ignition, normal is about .030.

For electronic ignition, normal is about .060.

I have no idea why RB recommends what it does: ask them.
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