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4 prong spark plug

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Dave

03-24-2003 19:05:48




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I was in a NAPA store today and saw a display for a spark plug that had 4 prongs (instead of the usual 1 prong on the electrode end). It also came as a 2 prong model. I can't remember the brand name. Are any of you out there using this product for pulling? What are your opinions? Thanks for the responses.




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Wally G.

03-28-2003 15:27:10




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 Re: 4 prong spark plug in reply to Dave, 03-24-2003 19:05:48  
Those four ground electrode plugs come standard in some Volkswagens and Toyotas. I never saw a difference in the way they ran after putting regular plugs in. Same goes for the split-fires. I think the idea was you could get four different flame fronts during combustion and would possibly burn better without pre-ignition



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Wally G.

03-28-2003 15:27:02




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 Re: 4 prong spark plug in reply to Dave, 03-24-2003 19:05:48  
Those four ground electrode plugs come standard in some Volkswagens and Toyotas. I never saw a difference in the way they ran after putting regular plugs in. Same goes for the split-fires. I think the idea was you could get four different flame fronts during combustion and would possibly burn better without pre-ignition



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Robert in GA

03-25-2003 15:24:22




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 Re: 4 prong spark plug in reply to Dave, 03-24-2003 19:05:48  
I work for Advance Auto Parts and we carry all three versions of those bosch plugs.. The only benefit the four prongs offer over conventional plugs is that the electrodes are platinum and will last longer. The regular single electrode bosch plugs are platinum too. Trust me that is an advertising gimmick.. there really isnt any performance benefit.. other than a theoretical one.



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RayP(MI)

03-25-2003 14:55:25




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 Re: 4 prong spark plug in reply to Dave, 03-24-2003 19:05:48  
Didn't they make some aircraft plugs with multiple electrodes a few years ago? Think the reason was so that if one electrode failed, the plug still worked?????



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laipuller

03-25-2003 19:48:44




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 Re: Re: 4 prong spark plug in reply to RayP(MI), 03-25-2003 14:55:25  
i have seen and have some multi electrode plugs used some hit& miss engines so that goes back several years to hi light your reply



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bob

03-25-2003 14:25:54




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 Re: 4 prong spark plug in reply to Dave, 03-24-2003 19:05:48  
I can't imagine they do much at all, other than make money for Bosch. Their advertising showing spark from the center electrode to all four ground electrodes is a joke. The spark will jump the path of least resistance, and that is always going to be just one of the electrodes. Splitfire shows the same crap in their ads. When a plug fouls, it's due to carbon or other conductive residue on the ceramic of the center electrode, and it doesn't matter how many ground electrodes you have in that situation. Spend your money on a good ignition system and wires, it'll be of much more benefit.

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LW

03-25-2003 12:44:10




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 Re: 4 prong spark plug in reply to Dave, 03-24-2003 19:05:48  
Moline used them from the factory in the HD 800 pump engines for lp or natural gas, they usally are a colder plug (less exposed),they will run longer before breaking down then a conventional plug under constant load, they run less gap but divide the spark energy in 4 directions, atleast thats what they claim, and they cost 5 to 10 times as much as a standard autolite....



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G-MAN

03-25-2003 10:55:38




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 Re: 4 prong spark plug in reply to Dave, 03-24-2003 19:05:48  
I think it's Bosch that's making those plugs. You can get them with one electrode, two electrodes or four-electrodes. The only possible benefit I can think of would be that they would eliminate the need to index plugs in a really high-performance application. Electricity goes to the path of least resistance, but since all the electrodes are connected to the same point, I don't see any huge advantage.

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laipuller

03-24-2003 19:43:39




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 Re: 4 prong spark plug in reply to Dave, 03-24-2003 19:05:48  
It could make a difference, but if you are running a hi energy electronic ign.(MSD or Jacobs),they reccomend not using splitfire type or exotic electrodes. if you are running Hi comp. ratio use the coldest plug you can find



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