Denso Vs NGK
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From: CT
Denso Vs NGK (edited last line)
Okay, I know that i could search this forum all day for the answers that i'm looking for and still not get it without asking directly...so:
I have a set of Denso IT 20's sitting in the garage. I was going to bring my truck in for a service (to develop a GOOD raport with my service manager and get on his good side) and have the dealership put in the plugs.
However, I've been told that the denso's fail more often than NGK's - is this true? I went with the denso's because they say that if something costs a lot - it's probably worth the money....are the denso's really worth it. Or will i be sorry?
Some vendors sell them, others don't. Do some vendors carry certain plugs because they "work" better with their tunes?? A little help would be appreciated...thanks
**Anyone suggest a possible gap for the denso's?**
I have a set of Denso IT 20's sitting in the garage. I was going to bring my truck in for a service (to develop a GOOD raport with my service manager and get on his good side) and have the dealership put in the plugs.
However, I've been told that the denso's fail more often than NGK's - is this true? I went with the denso's because they say that if something costs a lot - it's probably worth the money....are the denso's really worth it. Or will i be sorry?
Some vendors sell them, others don't. Do some vendors carry certain plugs because they "work" better with their tunes?? A little help would be appreciated...thanks
**Anyone suggest a possible gap for the denso's?**
Last edited by LightningCT; Nov 19, 2003 at 05:32 PM.
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From: DETROIT, (formerly Eaton County, Michigan)
oh boy here we go again....
NGK -- cheaper and the porcelain (sp) is stronger.
Denso, Real expensive, porcelin(sp) known to chip at detonation.
Either plug works fine, if your tune is correct and there isnt any detonation.
I had Denso's went with NGK.
Denso's were perfect when I pulled them out.
NGK -- cheaper and the porcelain (sp) is stronger.
Denso, Real expensive, porcelin(sp) known to chip at detonation.
Either plug works fine, if your tune is correct and there isnt any detonation.
I had Denso's went with NGK.
Denso's were perfect when I pulled them out.
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From: Paradise
I wish I had the can of worms picture for this topic!
One L owner will tell you the Denso's are great the other will tell you they are too fragile..........Many L owners on this form have had great success with the Denso's. I have tried them and generally speaking they were effective plugs, I think it all depends on your application (as far as mods). I personally like the Beru S1k's, they are $8 a pop and I have found them to be flawless, but again just because they work for me, doesn't necessarily mean they work for you.
If you can change your own plugs put the Denso's in, if you don't like them you can always try a different plug. I went through three different plug brands before I found my match. Just the mere fact you are changing from the stock plugs is a step in the right direction in my opinion.
Good luck
D-Day
One L owner will tell you the Denso's are great the other will tell you they are too fragile..........Many L owners on this form have had great success with the Denso's. I have tried them and generally speaking they were effective plugs, I think it all depends on your application (as far as mods). I personally like the Beru S1k's, they are $8 a pop and I have found them to be flawless, but again just because they work for me, doesn't necessarily mean they work for you.
If you can change your own plugs put the Denso's in, if you don't like them you can always try a different plug. I went through three different plug brands before I found my match. Just the mere fact you are changing from the stock plugs is a step in the right direction in my opinion.
Good luck
D-Day
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From: Olive Branch, MS, Memphis Burb
It's not that they fail more often. It's the way they fail that is the difference between Iridiums and copper plugs.
The things that make a plug fail will get any type made.
The copper plugs "usually" melt the ground strap and center electrode when things go wrong. The Iridium center electrode doesn't like to melt. It retains heat until it gets so hot that it cracks the porcelain off around it. Loose porcelain is more likely to do damage to your valves, heads and pistons than molten metal.
Any plug that destroys itself can damage a motor but the loose porcelain does damage more times than not.
Most people never loose a plug and never have to worry about this. If you run an aggressive program at the track, the cold weather pushes your tune over the edge or your fuel filter clogs you could lose a plug. These are just a few things that would cause you to melt a plug. There are many more.
The things that make a plug fail will get any type made.
The copper plugs "usually" melt the ground strap and center electrode when things go wrong. The Iridium center electrode doesn't like to melt. It retains heat until it gets so hot that it cracks the porcelain off around it. Loose porcelain is more likely to do damage to your valves, heads and pistons than molten metal.
Any plug that destroys itself can damage a motor but the loose porcelain does damage more times than not.
Most people never loose a plug and never have to worry about this. If you run an aggressive program at the track, the cold weather pushes your tune over the edge or your fuel filter clogs you could lose a plug. These are just a few things that would cause you to melt a plug. There are many more.
Last edited by LTNBOLT; Nov 19, 2003 at 04:58 PM.
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From: CT
Originally posted by LTNBOLT
It's not that they fail more often. It's the way they fail that is the difference between Iridiums and copper plugs.
The things that make a plug fail will get any type made.
The copper plugs "usually" melt the ground strap and center electrode when things go wrong. The Iridium center electrode doesn't like to melt. It retains heat until it gets so hot that it cracks the porcelain off around it. Loose porcelain is more likely to do damage to your valves, heads and pistons than molten metal.
Any plug that destroys itself can damage a motor but the loose porcelain does damage more times than not.
Most people never loose a plug and never have to worry about this. If you run an aggressive program at the track, the cold weather pushes your tune over the edge or your fuel filter clogs you could lose a plug. These are just a few things that would cause you to melt a plug. There are many more.
It's not that they fail more often. It's the way they fail that is the difference between Iridiums and copper plugs.
The things that make a plug fail will get any type made.
The copper plugs "usually" melt the ground strap and center electrode when things go wrong. The Iridium center electrode doesn't like to melt. It retains heat until it gets so hot that it cracks the porcelain off around it. Loose porcelain is more likely to do damage to your valves, heads and pistons than molten metal.
Any plug that destroys itself can damage a motor but the loose porcelain does damage more times than not.
Most people never loose a plug and never have to worry about this. If you run an aggressive program at the track, the cold weather pushes your tune over the edge or your fuel filter clogs you could lose a plug. These are just a few things that would cause you to melt a plug. There are many more.
