I have no personal experiences, but I have heard numerous times that platinum plugs can (in a forced induction car) run too hot, cause detonation, flake off, melt tips, etc. Just hearing/reading these things, whether they're true or not, have kept me away from platinum plugs.

It is also my understanding that under the same conditions, copper will produce a better spark then platinum and that platinum is used to prolong the life of the plug, not give better performance.

As PSIChick said, I have heard great things about the Denso iridiums, but that gets a little expensive, especially when you run a can of Torco mixed with 94 octane and your plugs turn orange.

 

so use real race gas instead. i now use C16 mixed with 93 and all is well

 

Stage 3 should be here in about four more weeks :crosses fingers:, and with any luck, I'll be using washer fluid instead of Torco shortly after.

 

Amen to that, brotha'!!! I just pulled my 4306's and they were bright orange. That racing additive definitely can foul things up a little, but, at the same time; I just installed the denso iridium itl20's(since they don't make a itl22 yet) and shielded wires, and the car has never run smoother. It even sounds a little different when I get on it.

So - I hope I don't turn my expensive denso's orange (being the HOM junkie that I am) too quick. Then again - Plugs(even denso's) are pretty cheap to replace every few few months If I have to. $'s are all relative, and these plugs are the shizbangnizzle.

I also talked to the techs at denso in detail, extensively, and they definitely know their stuff, and they recomended the plugs for our application, in various heat stages, depending on power output.

As far as iridium being too hot, the plugs have a specified heat range. The itl20 is a stage colder than the stock coppers, so I doubt they will have a heat problem. They even have itv22's and 24's if you are making a ton of power, and want it reeeaaallly cold, but they require a special wrench.

 

But boosters are soooooo cheap. Race fuel goes for like 6.50 a gallon around here.

WHEATBURNER - CONGRATS on the expected package. I am jealous. You'll need the race fuel for HOM for sure, though, on s3, homie. I hear it knocks out pretty easily in 4th.

 

For some reason or anotherall I can get , (even from NAPA) are stockers or champion platniums...looks like I'm gonna have to break down and and order them of the net.....and wait who nows how long.

 

napa should be able to get you the ngk's, i've ordered them before. they will have to be special ordered, but they can get them. sparkplugs.com ships out pretty quick if you call instead of ordering online, so you might want to try that.

wheat_burner - i'm getting w/i also, but i will tell you that it has been shown that in a lot of s3 cars w/i alone is not enough to hold hom. in s2 cars it is, but s3 is more sensitive to knock and requires a higher octane to hold hom anyway (104 with s3 compared to 100, or even 98, on s2). so even after getting w/i you may still need to throw in a couple of gallons of 100 to hold hom.

posthonda - denso now makes the ITL series plugs, which are the same as the ITV's only they now can use a standard spark plug wrench. the 22's are not available as a ITL however, only the 16 and 20's to date. i'm not sure if they plan on releasing the 22 in the ITL. it's not a big deal though, all you need to do is get a thin-walled 5/8ths or even just grind down and old one that you have around and it works just fine.

 

I also have the denso's and love them.

 

so they have figured out how to hold hom with the w/i system alone .

 

You must have misread my post, PSI Chick. Like I said, I have the ITL 20's and know they make no 22, yet. Denso plans to make a 22 and even 24, but haven't confirmed their production goals.