denso iridium plugs
denso iridium plugs are they good for nitrous? I know they rule in the forced induction apps, but I plan on going nitrous and this is what im running, should I step it down to a colder plug?
Staging Lane
Joined: Apr 2004
Posts: 68
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N20 and iridium plugs are a great combo, and yes, you should knock your plugs down one step colder for anything up to 150 shot. Colder for a bigger shot I think, some of the more knowledgable people should chime in on the heat range.
I run them on a 175 shot. I use the IT20 gapped at .045. My idle is much better using these over the TR6, which are a good plug too. My buddy, 02 Pewter LS1 uses the NGK Iridium and likes them. They are a little cheaper I think.
You might want to contact the plug manufacturer and ask them about the difference in melting point between their irridium tip and the copper they use in their racing plugs. I have a feeling the IR plugs may not be designed for high combustion temp & racing. Hopefully they can tell you the facts.
Personally I am conservative and stick to a racing type of plug like the AR472 from Autolite. Champion makes a good equivalent to this plug as well, but I can't remember the part #.
edit: don't be fooled into thinking that what works great in normal street driving will survive a lot of abuse with nitrous.
Personally I am conservative and stick to a racing type of plug like the AR472 from Autolite. Champion makes a good equivalent to this plug as well, but I can't remember the part #.
edit: don't be fooled into thinking that what works great in normal street driving will survive a lot of abuse with nitrous.
11 Second Club
Joined: Nov 2001
Posts: 1,320
Likes: 0
From: NE PA
I use the NGK TR6IX iridium plugs in my car. Concerning melting points, there's NO comparison in the melting points of iridium vs. copper with iridium being far superior.
Here are the melting points of the two:
Copper = 1981.4 degrees F
Iridium = 4370 degrees F
Here are the melting points of the two:
Copper = 1981.4 degrees F
Iridium = 4370 degrees F
NGK iridiums are about half the cost of the Denso, at least here in Hawaii. I bought, and immediately sold a set of Denso Ir, then bought the NGK Ir and ended having some cash in pocket.
I believe that's how they are everywhere. But hold the two side by side and you'll see why the Denso’s are more expensive. With that being said, I use the NGK Iridums most of the time. For some reason the Denso’s are always in our Lightning though... 
Matt
Matt
Originally Posted by CAT3
NGK iridiums are about half the cost of the Denso, at least here in Hawaii. I bought, and immediately sold a set of Denso Ir, then bought the NGK Ir and ended having some cash in pocket.
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Originally Posted by white2001s10
You might want to contact the plug manufacturer and ask them about the difference in melting point between their irridium tip and the copper they use in their racing plugs. I have a feeling the IR plugs may not be designed for high combustion temp & racing. Hopefully they can tell you the facts.
Personally I am conservative and stick to a racing type of plug like the AR472 from Autolite. Champion makes a good equivalent to this plug as well, but I can't remember the part #.
edit: don't be fooled into thinking that what works great in normal street driving will survive a lot of abuse with nitrous.
Personally I am conservative and stick to a racing type of plug like the AR472 from Autolite. Champion makes a good equivalent to this plug as well, but I can't remember the part #.
edit: don't be fooled into thinking that what works great in normal street driving will survive a lot of abuse with nitrous.
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Is that the melting point of pure iridium or the alloy they are putting into their plugs?
Originally Posted by XTrooper
Here are the melting points of the two:
Copper = 1981.4 degrees F
Iridium = 4370 degrees F
Copper = 1981.4 degrees F
Iridium = 4370 degrees F
11 Second Club
Joined: Nov 2001
Posts: 1,320
Likes: 0
From: NE PA
Originally Posted by white2001s10
Is that the melting point of pure iridium or the alloy they are putting into their plugs?
Here's some interesting information on iridium spark plugs.
http://www.spark-plugs.co.uk/pages/t...park_plugs.htm
Last edited by XTrooper; Sep 13, 2005 at 05:34 AM.
Originally Posted by Airwolf
I run them on a 175 shot. I use the IT20 gapped at .045. My idle is much better using these over the TR6, which are a good plug too. My buddy, 02 Pewter LS1 uses the NGK Iridium and likes them. They are a little cheaper I think.
Dam 175 shot
I run the NGK TR6IX gapped at .040 with my baby 100 shot.
The plugs sell for around $7.00 per plug not a bad price.
I do like the idle with these plugs much better than the TR6 plugs.
