Spark plug question
Dec 17, 2005, 11:09 PM
#1
Spark plug question
OK I am pretty sure this is the case but I want to make sure....
Will my plugs foul less with a smaller gap? I have them gapped pretty wide on stock ignition (.28). Should I try it smaller to keep them from fouling out?
Will my plugs foul less with a smaller gap? I have them gapped pretty wide on stock ignition (.28). Should I try it smaller to keep them from fouling out?
Dec 17, 2005, 11:22 PM
#2
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Gapping them smaller will help keep them burning better but I am not sure it will keep you from fouling them, what plugs are you running?
edit: Kinda tired when I wrote this but I meant that it will burn better in sense it won't blow out the spark, didn't realize you were fouling them out at idle in which case the smaller the gap would lead to fouling faster.
edit: Kinda tired when I wrote this but I meant that it will burn better in sense it won't blow out the spark, didn't realize you were fouling them out at idle in which case the smaller the gap would lead to fouling faster.
Last edited by Ultimate CC; Dec 18, 2005 at 08:43 AM.
Dec 17, 2005, 11:31 PM
#4
wider gap bigger spark more burn. narrow gap smaller spark less burn ... when i ran at .22 i would foul them pretty quickly. The electrode would be full of residue. Thats my experince with plugs. I now run at .30 and they seem to last longer. I have a set of NKG V-power plugs to try after i mess these up i have now. I was told they are less prone to foul and its also $2 dollars a plug 
I keep messing up plugs with the anti-lag and launch control. I can't help it hehe
I keep messing up plugs with the anti-lag and launch control. I can't help it hehe
Dec 18, 2005, 12:02 AM
#6
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Actually, it is generally more desirable to run as large a gap as possible because you will get a better burn. The problem with gapping is, the wider the gap, the easier it is for that spark to not fire, usually due to high boost or an overly rich condition. A smaller tighter gap will keep the spark from bein "snuffed out" from high boost or rich conditions, but may not "burn" as efficiently as a wider gap. It's like a balancing act. Gotta find that sweet spot for your particular application, taking into account your mods/boost, etc.
Last edited by aresix6; Dec 18, 2005 at 12:08 AM.
Dec 18, 2005, 07:12 AM
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Originally Posted by aresix6
Actually, it is generally more desirable to run as large a gap as possible because you will get a better burn. The problem with gapping is, the wider the gap, the easier it is for that spark to not fire, usually due to high boost or an overly rich condition. A smaller tighter gap will keep the spark from bein "snuffed out" from high boost or rich conditions, but may not "burn" as efficiently as a wider gap. It's like a balancing act. Gotta find that sweet spot for your particular application, taking into account your mods/boost, etc.
exactly, run the biggest gap you can or you will be leaving hp on the table. Gap size will have very little to do with how quickly they foul. That will be determined by how rich you are running and what heat range. Speaking of heat range, you want to run the hottest you can get away with. The stock heat range has proven to work for the basic upgrades, and wont' foul as quickly as a colder plug.
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Dec 18, 2005, 07:47 AM
#8
Well Im just trying to find a gap that will make it so if I am beyond rich for a few minutes at idle they wont foul instantly. I have no idea on the fuel tables Im working with so they get real rich for a few minutes and then they foul right away.. I dont know if a smaller gap would help at all for just this. Once its dialed in I will use the .28 which works fine when the car is running right.
Dec 18, 2005, 08:04 AM
#9
Originally Posted by TrinaBabe
Well Im just trying to find a gap that will make it so if I am beyond rich for a few minutes at idle they wont foul instantly. I have no idea on the fuel tables Im working with so they get real rich for a few minutes and then they foul right away.. I dont know if a smaller gap would help at all for just this. Once its dialed in I will use the .28 which works fine when the car is running right.
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