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Spark plug gap...How much does it really matter?

Old 10-21-2012, 01:36 PM
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Default Spark plug gap...How much does it really matter?

Did a bonehead thing yesterday

I changed the plugs in my Cig. On the port engine, I gapped all of the plugs. They were out of the box right at .035 and I set them at .040. Got done with the starboard engine and realized that I completely forgot to set the gap, most likely because I was in a hurry......and was bleeding all over the place from a phucking hose clamp slicing my hand.

My question is, does it really matter? If it does, no problem. I just pull them out and gap them and throw 'em back in. Didn't seems to affect performance at all. We managed to do a 6000rpm flyby of the neighborhood.....just to pizz off the sailboters.
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Old 10-21-2012, 02:10 PM
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If ya pizzed off the bloboaters, you did good.....
Go do it again, just to make sure everything is alright.
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Old 10-21-2012, 02:30 PM
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I'd leave them alone, the .005 difference is not going to be noticeable.
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Old 10-21-2012, 03:17 PM
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Naturally aspirated, doesn't matter a whole lot,.005 that is, blower or turbo, pull em out
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Old 10-21-2012, 05:38 PM
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wanna have some fun,,,,,go get spark plug gappers from auto zone,,,then orilies,,,then pep boys,,,,,gap plugs,,,,then check them with a feeler guage
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Old 10-21-2012, 05:57 PM
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your fine. just run'em
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Old 10-21-2012, 07:44 PM
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Why does it matter in a blower motor app?
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Old 10-21-2012, 08:22 PM
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i run mine .035 to .040 on both of my blown boats,back in the drag racing days [blown alcohol] i gapped them at .020 and used a msd 20 magneto.
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Old 10-21-2012, 09:02 PM
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Originally Posted by redbud35
Why does it matter in a blower motor app?
increased cylinder pressure blows the flame out across the larger gap
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Old 10-21-2012, 10:51 PM
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I would reset them or you just through your money away. By the time you wrote and posted this you could have had it done.
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