spark plugs??
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Joined: 04-03-05
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From: Pittsburgh, PA
zex suck you cant regap them, i switched to ngk, get copper, iridiums are garbage, i ngk only makes 1 step colder in copper, the part number is BKR7E, unless someone can someone knows if they make a 2 step colder plug in with a copper core.
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Joined: 01-26-07
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From: Colorado
dont mean to hijack but maybe someone could explain or show me a link?....
Why would you need to ignite 1 or 2 steps colder? what exactly does it do / effect?
I have a 2.2 and maybe will use n20, and down the line sometime will be boosted. I have a set of -1 ngk plugs, What would happen if i put them in now? or should i just wait; whats the point?
Why would you need to ignite 1 or 2 steps colder? what exactly does it do / effect?
I have a 2.2 and maybe will use n20, and down the line sometime will be boosted. I have a set of -1 ngk plugs, What would happen if i put them in now? or should i just wait; whats the point?
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Joined: 09-13-06
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From: San Antonio
when they refer to the plugs being colder they are talking about more heat being transfered from the plug to the head through more contact to the head and there is ceramic around the center electrode that helps disapate heat. and the smaller gap keeps the fast flowing air rushing into the combustion chamber from "blowing out the spark". Because trying to blow up air fuel mixture without a spark doesn't work well. 
The reason for the colder plugs is because a by product of compressing air is heat, generated from friction, (which is caused by the air molecules being so close to one another, from being compressed) and heat is an internal combustion's worst enemy...to an extent....and performance enthusiasts' worst problem. And we all know that the more air you cram into the combustion chamber the greater power it will yield. Well, eventually the plugs get heat soaked, much like our superchargers do and begin to act sort of like glow plugs, in diesel vehicles, look up info on them if you don't know, and you start to predetonate, which is igniting the air fuel mixture before the piston reaches the perfect/optimum time @ top dead center, thusly reducing power output. Eventually you can damage something and cause a world of hurt for yourself. 
So it is wise to run the correct plugs. And as for the debate on which brand of plugs to use, NGK's are perfectly fine. They have a long history of racing/ highperformace applications and I am running Iridiums. Zex is also a very reputable company, either or should be sufficient. As long as you run the correct gap and plug number you should not run into a problems. Feel free to post up any other questions. I am a plethera of knowledge and love to enlighten fellow enthusiasts. 
Thanks for reading.
The reason for the colder plugs is because a by product of compressing air is heat, generated from friction, (which is caused by the air molecules being so close to one another, from being compressed) and heat is an internal combustion's worst enemy...to an extent....and performance enthusiasts' worst problem. And we all know that the more air you cram into the combustion chamber the greater power it will yield. Well, eventually the plugs get heat soaked, much like our superchargers do and begin to act sort of like glow plugs, in diesel vehicles, look up info on them if you don't know, and you start to predetonate, which is igniting the air fuel mixture before the piston reaches the perfect/optimum time @ top dead center, thusly reducing power output. Eventually you can damage something and cause a world of hurt for yourself. So it is wise to run the correct plugs. And as for the debate on which brand of plugs to use, NGK's are perfectly fine. They have a long history of racing/ highperformace applications and I am running Iridiums. Zex is also a very reputable company, either or should be sufficient. As long as you run the correct gap and plug number you should not run into a problems. Feel free to post up any other questions. I am a plethera of knowledge and love to enlighten fellow enthusiasts. Thanks for reading.
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Joined: 02-27-07
Posts: 984
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From: Houston, Tx
when they refer to the plugs being colder they are talking about more heat being transfered from the plug to the head through more contact to the head and there is ceramic around the center electrode that helps disapate heat. and the smaller gap keeps the fast flowing air rushing into the combustion chamber from "blowing out the spark". Because trying to blow up air fuel mixture without a spark doesn't work well. The reason for the colder plugs is because a by product of compressing air is heat, generated from friction, (which is caused by the air molecules being so close to one another, from being compressed) and heat is an internal combustion's worst enemy...to an extent....and performance enthusiasts' worst problem. And we all know that the more air you cram into the combustion chamber the greater power it will yield. Well, eventually the plugs get heat soaked, much like our superchargers do and begin to act sort of like glow plugs, in diesel vehicles, look up info on them if you don't know, and you start to predetonate, which is igniting the air fuel mixture before the piston reaches the perfect/optimum time @ top dead center, thusly reducing power output. Eventually you can damage something and cause a world of hurt for yourself. So it is wise to run the correct plugs. And as for the debate on which brand of plugs to use, NGK's are perfectly fine. They have a long history of racing/ highperformace applications and I am running Iridiums. Zex is also a very reputable company, either or should be sufficient. As long as you run the correct gap and plug number you should not run into a problems. Feel free to post up any other questions. I am a plethera of knowledge and love to enlighten fellow enthusiasts. Thanks for reading.
The reason for the colder plugs is because a by product of compressing air is heat, generated from friction, (which is caused by the air molecules being so close to one another, from being compressed) and heat is an internal combustion's worst enemy...to an extent....and performance enthusiasts' worst problem. And we all know that the more air you cram into the combustion chamber the greater power it will yield. Well, eventually the plugs get heat soaked, much like our superchargers do and begin to act sort of like glow plugs, in diesel vehicles, look up info on them if you don't know, and you start to predetonate, which is igniting the air fuel mixture before the piston reaches the perfect/optimum time @ top dead center, thusly reducing power output. Eventually you can damage something and cause a world of hurt for yourself. So it is wise to run the correct plugs. And as for the debate on which brand of plugs to use, NGK's are perfectly fine. They have a long history of racing/ highperformace applications and I am running Iridiums. Zex is also a very reputable company, either or should be sufficient. As long as you run the correct gap and plug number you should not run into a problems. Feel free to post up any other questions. I am a plethera of knowledge and love to enlighten fellow enthusiasts. Thanks for reading.Edit: The rest of the info is good; I was just giving you a hard time because anytime someone types that they are a plethora of knowledge and mispells it (Plethera) it's funny.
Last edited by Mikey851; Apr 28, 2007 at 12:49 PM.
there was like one post about bad zex plugs, and even than it was just one, every now and than a bad plug will happen with every brand..... just the way it goes...... the zex plugs are pre gapped so you dont have to do it.
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From: Michigan
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Joined: 08-04-06
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From: Canada
Trust me I have both the NGK BKR7E's gapped at 0.040 and 0.035 and also have the ZEX plugs. I can tell you for sure the ZEX plugs are way better. You dont need to gap them, they are already pre gapped for turbo, supercharger and NO2 applications. There was only one post that had a pic of a bad ZEX plug, most people that have had both agree that the ZEX are way better. I run 17.5psi and have had 0 issues with them and can tell you for sure that the car runs way better than with the BKR7E's. Most people who swear by the BKR7E's have never had the ZEX plugs so they cant be sure. Either way the BKR7E's gapped right are good plugs but the ZEX ones are better period!!!
The ZEX Plugs are copper plugs not irriduim by the way
The ZEX Plugs are copper plugs not irriduim by the way
Last edited by QuikSilverSS; Apr 28, 2007 at 10:33 AM. Reason: Automerged Doublepost
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Joined: 09-13-06
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From: San Antonio
Great edit man!
Actually, the reason why you gap plugs smaller is because the higher the heat in the combustion chamber the higher the resistance, not because the air will "blow out the spark". Also, the optimum time to ignite the fuel mixture is not at top dead center but slightly before so that the fuel is expanding fully by the time the cylinder is on it's way down.
Edit: The rest of the info is good; I was just giving you a hard time because anytime someone types that they are a plethora of knowledge and mispells it (Plethera) it's funny.
Edit: The rest of the info is good; I was just giving you a hard time because anytime someone types that they are a plethora of knowledge and mispells it (Plethera) it's funny.
lol, yeah thanks for the extra help man.
I mess up REALLY easily when I get on my soap box. lol 
Oh, and just to mess with you, in a completely friendly way (so please don't get offended.), you misspelled misspells....lol just throwing it out there man. But yeah, you are absolutely correct about the hotter air making it difficult for the spark to jump. But I also believe that you can blow it out....to an extent.. and the tdc thing, COMPLETELY TRUE. I don't know what got into me. I guess just wasn't thinking. Great edit man. Need to learn from mistakes, and then they are worth while.
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Joined: 02-27-07
Posts: 984
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From: Houston, Tx
lol, yeah thanks for the extra help man. I mess up REALLY easily when I get on my soap box. lol Oh, and just to mess with you, in a completely friendly way (so please don't get offended.), you misspelled misspells....lol just throwing it out there man. But yeah, you are absolutely correct about the hotter air making it difficult for the spark to jump. But I also believe that you can blow it out....to an extent.. and the tdc thing, COMPLETELY TRUE. I don't know what got into me. I guess just wasn't thinking. Great edit man. Need to learn from mistakes, and then they are worth while.
I mess up REALLY easily when I get on my soap box. lol Oh, and just to mess with you, in a completely friendly way (so please don't get offended.), you misspelled misspells....lol just throwing it out there man. But yeah, you are absolutely correct about the hotter air making it difficult for the spark to jump. But I also believe that you can blow it out....to an extent.. and the tdc thing, COMPLETELY TRUE. I don't know what got into me. I guess just wasn't thinking. Great edit man. Need to learn from mistakes, and then they are worth while.Haha, you're right, I did misspell..... haha. I think that's even worse.
