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A popular mod on Spark plug was the side gapping to let the flame kernel propagate quickly in to the cylinder, to give better combustion of the fuel charge . I am sure Fellow XBHPians will be able to throw more light on this with their Vast knowledge .
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The topic that you are asking here is a unusual one.. maybe no one has gone to the extent of determining as to how exactly the flame propogates.Originally posted by psr View Post
actually i doubt if anyone will be able to throw light except the very few pro tuners/ core engine designers.. all the best for the thread.. i am keeping a eye (and ear nose etc etc
) on this thread...
as far as i know, the side gapping will definately help in the flame propogation as it creates a open space for the flame spreading but what i know is competely theoretical.. let the pro tuners comment here..Suffering from Parked Motorcycle Syndrome
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Well . . m also a new bee here.. but as far as I know, flame propagation inside the cylinder is affected mainly by the design of the combustion chamber. . . The more the air-fuel mixture swirls inside the cylinder, before the spark ignites the mixture(without quenching the spark), the better is the combustion. But i still did not understand the exact purpose of side gaping the spark plug. . I dont think it will affect the flame front propagation. Well, i would definitely like to see more replies on this.Originally posted by psr View PostComment
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The flame propagation from the Spark Plug is dependent on ,whether it opens into the cylinder or it is shrouded by the ground electrode.I am using this mod in my KB 100 with good effect. For my car I use NGK BP6ETOriginally posted by myselfarvi View Post
Here is the link..Performance Unlimited 4-Wheel & Off Road Center - Hartford, Wisconsin - USA Technical DocumentsLast edited by psr; 08-23-2010, 08:39 PM.When Was The Last Time,You Did Something For The First Time.Comment
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Here are some Pic of Bosch and NGK side gapped spark plugs.Three Ground electrode is NGK and the four ground electrode is by Bosch. Both are self cleaning.Last edited by psr; 08-23-2010, 08:46 PM.When Was The Last Time,You Did Something For The First Time.Comment
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how much do they cost?? Do they have any proven performance??Originally posted by psr View PostNOT BEEN THERE NOT DONE THATComment
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oh... never knew tat side gapping would be this effective... thanks for the info..
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They cost between 75 to 130 rupees each,depending on the make.. The NGKs are good .Mainly there is no hesitation while acceleration and both my car and bike idle smoothly. Hence I guess they are working. I also get 0.5 kms extra per litre with my Lancer and on my bike 2 kms extra.Originally posted by madhav krishna View Post
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are they better than the G-power & iridium spark plugs??Originally posted by psr View PostThey cost between 75 to 130 rupees each,depending on the make.. The NGKs are good .Mainly there is no hesitation while acceleration and both my car and bike idle smoothly. Hence I guess they are working. I also get 0.5 kms extra per litre with my Lancer and on my bike 2 kms extra.NOT BEEN THERE NOT DONE THATComment
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You can do it to on a old spark plug just to experiment as a D I YOriginally posted by myselfarvi View Postoh... never knew tat side gapping would be this effective... thanks for the info...If you are cutting a standard plug remember to keep a metal hacksaw blade between the center electrode and the ground one. This will save the center electrode from being chipped. Otherwise you can buy the standard ones as shown in my post and be happy. For two wheelers it comes with two ground electrodes and will last much longer since there are two electrodes to wear out .
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I will reply on the G- power later since I have no knowledge on it....Iridium is purely for making the plug last longer ,with better temperature tolerance,and by making the electrode thinner the iridium will spark even with low output of HT.Originally posted by madhav krishna View Post
The side gapping actually allows the flame kernel to develop into the cylider much quicker than normal spark plugs.
Any side gapped plug whether it is copper shrouded nickel, or Iridium will have this advantage.
Do not opt for platinum plugs as they are notorious for fouling in real life use. They are for a much higher temperature usage.When Was The Last Time,You Did Something For The First Time.Comment
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I just read the G-power plugs spec on NGK site.....It is not side gapped so the benefit is not there....plus it is a platinum plug meant for engines operating at prolonged high temperatures....like Nascar run or most high compression applications. Hope I was helpful.Originally posted by madhav krishna View Post
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They both are cpr type ,that is center electrode is protruding ,so obviously they are hotter and will self clean up properly.But what i am interested is in how the hesitation was taken care of? any ideas? because my bike is experiencing some jerking at higher revvs .I changed the adapter and it took care of it .But it keeps coming and going .Kindly give the number of the NGK plug shown in the pic.Is it a CR type? and which model is it used for?Originally posted by psr View PostThey cost between 75 to 130 rupees each,depending on the make.. The NGKs are good .Mainly there is no hesitation while acceleration and both my car and bike idle smoothly. Hence I guess they are working. I also get 0.5 kms extra per litre with my Lancer and on my bike 2 kms extra.
I have tried the twin electrode of the rtr ,the bosch one and found it very hot for my bike and reverted back to NGK R CR7E IX.My bike is a 195cc fiero.I have tried NGK R CR8E AND NGK R CR9E too but found that the engine performs better with the stock plug that is NGK R CR7E and the iridium equivalent IX .
ps: engine is a high compression one now.Last edited by gixxer_junkie_m; 08-25-2010, 04:31 PM.Life begins, once you hit the power band !!Comment
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