i have TR55's but i have heard that these denso iridiums and the next best thing. is that true?

 

funny, im about to do plugs swap.

 

so whats your opinion or fact? i love the NGK's. thats what i use. just wondering?

 

thought they were same company.

 

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. 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.

 

I spent $100+ I belive at Autozone for my Densos...

If im correct Sparkplugs.com has the NGK for way cheaper, either of them are great plugs though!

 

I spent $65 at Kragen

 

Nope. But both make good plugs.

 

ngk's are what im usin, there great

 

never ever had a prob with ngk tr55's for over 400rwhp
besides the ones i cracked when trying to install
never tried the denso

 

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.

 

I've run the NGK iridiums and the regular ole copper v-powers. Noticed no difference in either. From now on, I'll only be spending $16 for my spark plugs.

 

Ive always ran NGK in my cars

 

The difference in conductivity is negligable really. The added life of iridium under the harsh conditions of the IC engine is noticable.

 

Just bought the denso's yesterday at Autozone for ~$75

 

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.

 

.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.

 

ive always used NGKs-never had experience with the densos

 

You are correct.

 

Now we're getting a little ridiculous with the claims...so you can pull 8 spark plugs in 10 minutes and replace them as well.....not to mention the # 8 plug. Sorry, I don't buy that.