Denso vs NGK
Originally Posted by TX_SS
thought they were same company.
"Iridium is a precious metal that is 6 times harder and 8 times stronger than platinum, it has a 1,200(=F) higher melting point than platinum and conducts electricity better. This makes it possible to create the finest wire center electrode ever. Prior till now, platinum had been favored for long life or performance spark plugs due to its high melting point, also the technology did not exist to machine and bond iridium on a spark plug electrode(at least in a cost effective manner). Iridium industrial spark plugs have been around for years, but still sells for over a hundred dollars per plug. Just now is the technology available to effectively use iridium in a spark plug for automotive applications. The strength, hardness and high melting point of iridium allows NGK to manufacture their iridium ultra-fine wire center electrode to 0.7mm. One of the finest firing points in the industry! (Thus far there has been no problems reported regarding use of iridium plugs with nitrous oxide.)"
BTW: I ran them in my car b/c i am the type of person that thinks every lil bit helps.
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Originally Posted by dubs6
Off NGK's website
"Iridium is a precious metal that is 6 times harder and 8 times stronger than platinum, it has a 1,200(=F) higher melting point than platinum and conducts electricity better.
"Iridium is a precious metal that is 6 times harder and 8 times stronger than platinum, it has a 1,200(=F) higher melting point than platinum and conducts electricity better.
But what they don't tell you is that copper conducts electricity better than iridium.
Unless you're doing this solely for longer plug life, stick with copper.
Originally Posted by Greed4Speed
But what they don't tell you is that copper conducts electricity better than iridium.
Unless you're doing this solely for longer plug life, stick with copper.
Unless you're doing this solely for longer plug life, stick with copper.
The difference in conductivity is negligable really. The added life of iridium under the harsh conditions of the IC engine is noticable.
Also, the Iridium will not errode like the Copper plugs will. I have been using the Iridium's since my cam install and the gap has not changed (30,000 miles @ 0.050 inches). After using the V-Power Plugs for 25,000 miles, the gap would jump by 0.012 inches.
Originally Posted by Blacker
Also, the Iridium will not errode like the Copper plugs will. I have been using the Iridium's since my cam install and the gap has not changed (30,000 miles @ 0.050 inches). After using the V-Power Plugs for 25,000 miles, the gap would jump by 0.012 inches.
If I wanted to put my plugs in and never take them out, I'd run the iridiums. But, it only takes me about 10 minutes to change the plugs.
TECH Resident
Joined: Feb 2003
Posts: 827
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From: Dallas, TX
Originally Posted by TheBlurLS1
.012"? That's nearly-nothing when it comes to plugs that you're hand gapping anyway. If people are gapping them from .050 to .055, what does .012 matter?
If I wanted to put my plugs in and never take them out, I'd run the iridiums. But, it only takes me about 10 minutes to change the plugs.
If I wanted to put my plugs in and never take them out, I'd run the iridiums. But, it only takes me about 10 minutes to change the plugs.