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NGK or Denso Iridium?

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Old Apr 8, 2003
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Question NGK or Denso Iridium?

i was just thinking again, what do you people think is a better spark plug the NGK Lazer Platnum or the Denso Iridium?
ive got the NGKs, but just wondered what people thought and possibly why
Old Apr 8, 2003
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I really doesn't make a difference. I have the the Denso iridiums in my car and they don't seem that much different than stock plugs (which are densos too). Any engine modifications with our cars really don't make a difference. i don't have any experience with NGK plugs, but I am sure they are just as good.
Old Apr 8, 2003
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There are three basic concerns when shopping for a spark plug, idle quality, performance, and longevity. Copper seems to idle the best as well as offer the best starts. The downside is copper plugs show gap erosion at around 7,000 miles.
Platinum plugs last well beyond 7,000 miles, they do not perform as well as copper.
This is where Denso enters the picture. Denso claims good all around performance as well as longevity with their iridium plugs. Start up and idle is at least as good as with copper plugs, and better than platinum plugs. Longevity has yet to be determined. It has the world's smallerst electrode as well: To lower the required voltage and improve firing performance.
http://www.denso.co.jp/PLUG/iridium-e/
Old Apr 8, 2003
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i'd do with the denso iridium's
Old Apr 9, 2003
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Stock plugs are already platinum. I like the Denso iridiums.
Old Apr 9, 2003
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I just put the Iridiums in a couple weeks ago and so far, no problems. I haven't really noticed much difference, but I'm not totally certain what I should be looking for ...
Old Apr 9, 2003
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I think it just runs smooooooother.
Old Apr 9, 2003
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DENSO IRIDIUMS LOOK AT MY SIG
Old Apr 9, 2003
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I think if you spend more then 12 bucks on a set of 4 spark plugs you are a complete moron and deserve to be shot in the sack with pepper *****.
Old Apr 9, 2003
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Originally posted by HondaGuru
I think if you spend more then 12 bucks on a set of 4 spark plugs you are a complete moron and deserve to be shot in the sack with pepper *****.
Hell. I'd pay $43 to watch a dog ****.
Old Apr 9, 2003
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These "gimmic" spark plugs are pure assrape, as well as bullshit.

Electricity, by its nature, flows along the path of least resistance.

What does this mean exactly? It means that, generally speaking, multiple grounds such as the BOSCH +4 and Zex plugs are useless.

Why? Simple.




A. terminal
B. ceramic insulation
C. center electrode
D. gap
E. ground electrode

Say this spark plug has multiple grounded electrodes, like a +4.
Now say, it is in an engine and is about to fire.
The spark energy flows down the center electrode, out into the gap and onto the closest (remember "path of least resistance"? ground.
This pattern will then repeat over and over for the entire life of the spark plug. That means the spark will hit the same ground EVERY time unless the grounding becomes damaged or so corroded its proximity to the center electrode is no longer enough to make it the least restrictive path for the electricity. In that case it will move onto one of the other grounds.
And that brings us to the only plus of having multiple grounded electrodes. Fact of the matter is though, unless you dont plan replacing your plugs between 100K mile intervals you will never need the extra grounds.
This is one of the reasons why cars advertise "no tune ups before the first 100K miles".
Personally, because I run nitrous, I change my plugs with every oil change.

The same goes for platinum and iridium plugs. These dont offer better performance. They dont give you better MPG, and they dont make your car run "smoother" (unless you are replacing some old busted plugs, in which case ANY new plug would make it run "smoother"). They just last longer. This is another "100K mile tune up" deal. Under normal driving conditions the center electrode made out of these harder materials will, of course last longer. Because as we all know its so costly to change spark plugs at 60K miles, this is a must have, right? Pfff.
The ONLY reason why dealers recommend these plugs and why manufacturers put them in their cars is for that reasons and that reason alone.

Now, for high compression, turbo, and or N20 applications PLATNUM AND IRIDIUM plugs ARE NOT GOOD. The center electrodes will actually crap out much faster then your standard core electrodes under those conditions, especially N20 applications. Ive seen many a nitrous'd car running Denzos pop a plug. Trust me on this one.

And for the record ZEX SUCKS ***!!!! Yes, thats right. ESPECIALLY their spark plugs.
How do I know this?
I bought a set. Not only are they 2X as expensive as the NGKs I use now the crapped out on me.
Three sub 15 second runs on brand new Zex plugs (on just a 50 shot mind you) resulted in one SEVERLY melted #3 plug. And I mean SEVERLY. All 3 ground electrodes were carbon coated, the center electrode AND the protective ceramic coating were melted and vaporized completely through. Thankfully there was no engine damage, but thats not the point. For a full year after that I ran the EXACT SAME set up with my NGKs, and had NEVER had a problem. Not once. Whats that mean? Its obviously not a mechanical or installation problem with the nitrous or fuel injection, rather its solely the fault of the plug.

PIECE OF ****

Plus Zex plugs are made in France. That should tell you enough.

Oh, and what do I reccomend for Nitrous and turbo applications? NGK-BKR7E (8E's for apps that call for 2 steps colder over stock) thats what. 2 bcuks each (high end) and are t3h b3st.


Whats all this mean? An NGK that costs you a buck a piece at pep boys will do the exact same job as a 15 dollar denso in most applications. It just wont last to 100K miles before needing to be changed. BFD.

Last edited by HondaGuru; Apr 9, 2003 at 01:31 AM.
Old Apr 9, 2003
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Nobody said **** about mutiple grounds.
Old Apr 9, 2003
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When you go around calling people morons, why should anyone giver a rat's *** what you recommend?
Old Apr 9, 2003
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Originally posted by Bartkat
Nobody said **** about mutiple grounds.
Actually I did. It'st of the whole "gimmick" deal. I also mentioned your precious assrape iridiums. Try reading the whole thing before you reply again.
Old Apr 9, 2003
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good job Joe!
Old Apr 9, 2003
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Originally posted by Bartkat
When you go around calling people morons, why should anyone giver a rat's *** what you recommend?
A) because Im right
and
B) I really could care less if you waste your money on useless bullshit. I just wish you would send it to me instead. Id put it to better use.
Old Apr 9, 2003
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Originally posted by HondaGuru
Actually I did. It'st of the whole "gimmick" deal. I also mentioned your precious assrape iridiums. Try reading the whole thing before you reply again.
Why should I read on with anything a lame *** flamer jerkoff like you puts up?

Last edited by Bartkat; Apr 9, 2003 at 01:31 AM.
Old Apr 9, 2003
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Originally posted by HondaGuru
A) because Im right
and
B) I really could care less if you waste your money on useless bullshit. I just wish you would send it to me instead. Id put it to better use.
If you could care less, then you can go peddle your useless bullsheit on some other thread.
Old Apr 9, 2003
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Actually I should go pedal iridium spark plugs. It seems Id make a killing off of uninformed and the easily fooled segments of the automotive public.

Oh.. I know, Ive got another bridge in Brooklyn to sell you:
http://www.ipsracing.com/engine/igni...oon_plugs.html

Spoon Sports Iridium Racing Spark Plugs

Through the regulation of engine characteristics and the implementation of Denso-manufactured iridium plugs, racing plugs of two different thermal values have been made available at Spoon. The speed of heat escape is higher in plugs with larger thermal values, and consequently, such plugs are characterized by rapid cooling. Accordingly, a thermal value of 27 is recommended for high-load, circuit-type situations; a thermal value of 24, for regular road driving. Note, however, that higher numbers do not necessarily lead to increased power and greater maximum speed




ONLY 95 bucks for a set of 4! I mean damn... for that much I bet ambrosia and frankincense come out of your tail pipe and you get a 30MPG increase! lease:

Last edited by HondaGuru; Apr 9, 2003 at 01:38 AM.
Old Apr 9, 2003
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Yeah, call your customers "morons" and you won't sell ****.
Old Apr 9, 2003
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Thiis guy is a regular car genius. You can tell by the way he copies and pastes info.
Old Apr 9, 2003
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Originally posted by Bartkat
Thiis guy is a regular car genius. You can tell by the way he copies and pastes info.
Ummm... way to go Sherlock?

Which "info" were you talking about, the Spoon Sports ad, which i also LINKED or the post that I had previously made MY SELF which I copied and pasted from HERE (see 2nd reply in thread)?

Got own3d?
Old Apr 9, 2003
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hey the iridiums, improve gas mileage...Even if its so insignificant they still pay for themselves....SO WHY NOT???? its fun to add stuff and mod a car
Old Apr 9, 2003
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Everything you put on here is copy and pase, genius. From one website or antother. Go peddle your knowledge somewhere it's appreciated.

The topic here is "NGK or Denso Iridium."

Nobody asked about ntrous.

Nobody asked about forced induction.

Nobody asked about copper.

Nobody asked to be called a moron by Joe the Flamer.

Nobody asked you anything.
Old Apr 9, 2003
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Oh, and to answer your previous question about why anyone would believe me? How about the fact that what I post is made a sticky on clubsi? I’m sorry, how many tech articles have you written up and posted which were done well enough to be made permanent on ANY site, let alone the premire Honda site for import enthusiasts? Oh yea... none.

Last edited by HondaGuru; Apr 9, 2003 at 01:49 AM.
Old Apr 9, 2003
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OMG... sides.. hurt...from... laughing...

Its your money. Waste away my friend, it will only help the economy.
Old Apr 9, 2003
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Originally posted by HondaGuru
Oh, and to answer your previous question about why anyone would believe me? How about the fact that what I post is made a sticky on clubsi? I’m sorry, how many tech articles have you written up and posted which were done well enough to be made permanent? Oh yea... none.
Yeah, that's got to be a fargin' lifetime achievement to get a sticky on some fargin' website.

All my tech reports are on file with the company and not public knowledge. I get paid to do ther research and write the reports. Do you get paid for yours?
Old Apr 9, 2003
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Sorry if your ego got bruised, little buddy. Just don't be coming around where I am, calling people morons, and you'll be ok.
Old Apr 9, 2003
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Actually I'm quite disappointed. I really did think that you learned something the last time you tried to start some **** with me.
Old Apr 9, 2003
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um, id hate to but in, but i felt at least slightly informed after reading gurus post that started this whole mess.....

anyways - i got the NGK Lazer Platinums and i believe they were 9.99 each, but i think the lady messed up cause she only charged me like 12somthing, cause i got the socket too. either way tho, i guess im glad i got the NGKs cause i guess they are about the same. and it was fun to change em, even if it was just sparkplugs



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