To the person that said they would never use $2 spark plugs in their car. Why not? They work! DSM's have used them for years running INSANE times. $2 or $20 if they work they work.

 

The $2 plugs have gone 7 seconds in Buschur's car if I remember correctly...

 

My friends, we all know that as the pressure increases in the cilinder chamber more difficult is to spark. I can`t understand how a person pay a lot of money for a car (for me the EVO isn`t cheaper) and throw a crap spark plug in the car. We pay 800 bucks for a cat back and save money on the spark plugs? It is a joke. I`m not a tech engineer, but I think the best spark plugs for the EVO are the stock ones and Iridium like NGK. I will buy the Ralliart spark plugs because it was developed by Ralliart together with NGK, so it is a specific part for the EVO, developed for my car not a generic plug. Just my opinion! Good luck

 

...it's silly to pay $800 for a cat back too. Point is that arguement holds no water. What works is what is important... if your spark plugs are given to you for FREE from a friend, and they WORK, are they even less valuable in your eyes?

 

From what I understand, the copper plug works just as well on the forced induction cars. IIRC you want to go one heat range colder every time you double HP
THe only thing is the copper plug may need to be replaced more often.

 

Hey all,

I'll repost my experience with the IW24 here.

I replaced the stock NGKs with the Densos several months ago. My car ran great, but I was showing some knock on the SAFCII. Yes I know it's not super accurate, but I'd rather not see the knock readings. Usually less than 50, but once in awhile a spike to 100+. Somtimes, it felt like timing was being pulled after a knock reading.

Car ran well at first with the densos, and knock readings were lower, but over time I got more and more misfires/hesitations at ~3500-4500 rpm. I wasn't sure if it was fuel cut or misfire, and it was kind of random. I did trigger a cel a few times, so I started thinking it was the p03x problem.

Last weekend I pulled the plugs to make sure my Magnecors weren't loose or anything like that and double-check the gap. The Densos looked ok, although a bit black, so perhaps they were fouled. I ended up breaking the tip on one trying to regap (doh!), so I threw the stock NGKs back in.

Lo and behold, the hiccup in power is gone and the car feels great. I thought I was getting used to the perf of the car, and that's why it didn't feel that fast, but it must have been pulling timing from the misfires, since it pulls much better and smoother now, esp in the midrange where I was always expecting the sudden loss in power...

Gap on the densos was about .028 or .029, so maybe they were gapped a little high. Also, they may have been fouled. I'll prob stick with NGK iridiums for the replacement, in the same stock heat range, or I may try some 8 range coppers to see if my car likes em. Someone posted the lancershop has NGK iridiums in an EVO application? I couldn't find the stock NGKs anywhere, I think Mitsu has some monopoly on them?

In my N/A honda and my mildly modded Audi 1.8T I always used NGK coppers that I changed fairly frequently. If the plug fires and doesn't foul or cause misfires it should be fine.


Take care, sorry for the novel, heh.

FB

 

Nice post, keep us informed about your experiences with spark plugs.

 

"I will buy the Ralliart spark plugs because it was developed by Ralliart together with NGK, so it is a specific part for the EVO, developed for my car not a generic plug"

actually they are just a generic plug - there is nothing Evo specific about it.

The coppers work reasonably well for lots of people...I have used them since forever in my GVR4. Only downside, as mentioned, is they don't last all that long. I can go about 7500 miles between changes, though my car never sees race gas is spends a fair amount of time under boost, so they get a pretty thorough cleaning.

As for the Iridiums, they work very well as well. However there is something important to consider - we have noticed that lots of people have installed them after reflashing the ecu..this can have a big impact on how they run overall. if you plan a reflash, best to have your intended plug in there beforehand to take out any unnecessary variables.

adam

 

I used to use NGK copper plugs, one heat range colder than stock, in my modded GSX. True, the coppers need to be changed more often than Iridiums or Platinums, but I didn't mind doing it, and it was nice to have fresh plugs every 10,000 miles.

To the original poster: if you think you're to the point that you need colder plugs, try a set of colder NGK coppers. If they don't work for you, go back to whatever you were using, and you're only out about $8.

 

I've been using the BPR7ES and they've been fine on the street, track, etc.

 

Funny thing is I got my new Options mag the other day and all the tuners there with evo's were running NGK br7es or the NGK br8es's. But I guess they must know nothing eighter since they have only been messing with the evo since it came out.
I run the BR8ES's on my car and they seem to work the best. I have tried almost all the plug combonations but keep going back to the BR8ES's. Platinum plugs were made to last a long time, and have very little to do with actual performance. They are used on almost all cars now because of their long life expectancy. On some cars the plugs are hard to get to which is also another reason platinum plugs are factory equipment.

 

Hey, people just don't feel that they are getting their money's worth in the import market these days, unless they are being "broken over the barrel". $100 shift knobs, $800 for some bent intake tubing (intercooler piping), or $20 a sparkplug, next thing you know, they will spend $1200 on stainless steel tubes with a muffler (exhausts)... Oh, wait... "you get what you pay for", BS

 

sometimes you do get what you pay for....this is not one of those cases though

Concensus..the coppers work just fine, the Iridiums work fine as well.....largely comes down to personal preference

 

Of course you do. Just not more often than not, when dealing in the "import scene". I just hope people start seeing that pricing has little to do directly with performance.

 

totally agreed.....more expensive is not always better. Laforza's were expensive trucks....most people here would ask what a Laforza was