Do not modify. Return to store and get replacements. Explain why to clerk. Use some kind of non permanent or non-damaging tagging to indicate which plug had which measurement. Check gap in store before leaving. Also send note to NGK about incident. Include photos showing what your found. You have a defective product and NGK would want to know something is wrong about the products it produces. You could also contact NGK first and ask for good quality replacements in exchange for sending defective parts directly to them, but it might take more time, and there is no guarantee they will pay for shipping to their location. Lurch77 Premium Member join:2001-11-22 Green Bay, WI 1 edit
Hi All. My First Post! After searching the forums for information on spark plugs quite a bit, I've boiled it down to three plugs that work, and several that are commonly recommended and should be avoided. The available plugs for the Mazdaspeed 6 are: Plug_____________ Factory Gap (in) ____ Price ea ___ Hot/Cold ____ part # Stock
OEM: Denso Iridium _________ .031 __________ ~$10 _______ -1 _______ ITV22 Anything else is Gapped Incorrectly. Adjust at your own risk - Available on the Internet - - Prescribed by your Local Parts Store. Don't let them sell you this junk - What I Know: - 1 step colder per 100 HP increase is a good rule of thumb,
and is only recommended for those who drive hard and have increased the Horsepower/Boost - Gap should never be adjusted with a coin style tool, to avoid breaking the delicate tip. UPDATES NGK Part naming chart Last edited: Mar 31, 2012
Regular parts store is more for older and non-boosted cars. I ordered mine for my non-turbo 2.3 6 and NGK had exactly what I needed. E-mail them what you need and you'll get a great response and suggestion.
Denso ITV22's are one step colder than stock, while the ITV24's are two steps colder. I don't know the heat ranges off hand, but you should be able to find them from the website. For the MS6, it's widely recommended that you avoid the NGKs and go with the Densos, so that you can properly gap them without exceeding their tolerances. They are the same price at most places,
so choose wisely.
stock ones should be NGK Laser Iridiums... which is the ILTR6A-8G, an 8mm pre-gapped plug... the motor was spec'd and designed with the metric system, so you will be fine putting in the plugs as-is... it is not necessary to regap them slightly smaller using the archaic imperial system these plugs should last at least 60k miles anyway, no need to mess with them!
Those gaps are still a bit much. Many techs recommend .024-.028. I had problems with too much gap and actually blowing the spark out causing a P0300 CEL for multi-cylider miss-fire. I gapped the plugs to .025 and solved that problem. Going one step colder is recommended if you are using COBB AP programming. Last edited: Jul 28, 2009
Anyone running the AP should be on a set of ITV22s gapped to .028 per their site.
I have the ITV22's in my car (stock) and they work great. I didn't adjust the gap what so ever. I swapped them out because when I first had the far the stock plugs were fouled and I would misfire in 5th and 6th on the highway....ITV22's solved that in a hurry, though.
So Lucas, you're running the ITV22's completely stock and everything is smooth? I'm planning to do plugs this summer, and I'm pretty close to stock. Probably will end up with SRI, TIP, and possibly a test pipe in the near future for power mods.
So Lucas, you're running the ITV22's completely stock and everything is smooth? I'm planning to do plugs this summer, and I'm pretty close to stock. Probably will end up with SRI, TIP, and possibly a test pipe in the near future for power mods. When my
car was stock I ran ITV22's and it made the car run smoother.
So Lucas, you're running the ITV22's completely stock and everything is smooth? I'm planning to do plugs this summer, and I'm pretty close to stock. Probably will end up with SRI, TIP, and possibly a test pipe in the near future for power mods. Yep, completely stock and the car runs much smoother than it did before (fyi, stock plugs w/ 30K miles). I'll be adding the same things that you are....Cobb SRI/TIP ordered and the test pipe is waiting to be installed. I'll let you know how everything works out once it's all in.
Chris, how are the ITV24's treating you? I've been seeing more knock again, so I'm thinking of going to a 2 step colder plug to try and counter it.
Chris, how are the ITV24's treating you? I've been seeing more knock again, so I'm thinking of going to a 2 step colder plug to try and counter it. Running 93 octane with 10% ethanol (actually 94.5 octane) on the Stage 2 +TMIC map I'm still seeing a .3
or .7 here and there at partial throttle. Aside from that, I'm not getting the 2's and 3's of KR I was getting with one step colder. It has been a very good experience thus far. I don't think I would go any farther than 2 steps colder though.
2006 Mazdaspeed6: SPARK PLUG Alright, So ive been thinking about which spark plugs i should be putting on my ms6 and not too sure which route to go.. I was looking at the NGKr's and the DENSO one step colder. I live in Houston, TX so its fkn hot. idk if that matters or not.. if anyone could be of any assisstance, I would greatly appreciate it. Thanks,
The performance difference between the two brands is negligible. I would only go with one step colder plugs if you have some performance modifications done to the car. Like an intake, full exhaust, intercooler, and more boost then stock or if you are having problems with detonation. Without the added heat from the extra horsepower the colder plugs will just foul out faster.
excellant choice..u wont be disappointed.
Hey RJ, I couldn't view the second link from where I am. I did check out the first link. I've seen that kind of stuff before. It's a gimmick. From the outside, one could see "wow, that's a pretty neat idea". The energies behind what they call an "ultrasonic harmonic" are actually lower than the energies provided by the spark coming from the electrode. There
will be some energy loss on the part of the spark by way of resistance as it passes through the molecules that make up the air/fuel mixture. The energy loss experienced by the "ultrasonic harmonic" is much greater than the spark as it attempts to condition each molecule instead of passing through it. However, even with that energy loss the air/fuel mixture will still be far more conducive to electric current than a differential pressure. In the end, the spark will still do all the work.
It's a shame that people don't have to prove their idea works to get a patent. It's misleading to the consumer. I guess congrats to them for coming up with something that they can piggyback on Panasonic's marketing efforts. I hope they've made enough to pay for the patent. Stick with Denso Iridiums for your turbo car. Last edited: Sep 8, 2009
possible correction Everywhere I look, the Denso ITV20 (stock compatible plug) is not gapped properly and has a .044 gap, which is out of the range of what is recommended for the Mazdaspeed.
If you're going to stay with the stock heat range plug, then just got OEM and get the Mazda NGKs. It's a bit of an odd system, but it sounds like colder than stock should be Densos, and stock should be OEM (NGK). What is the recommended spark plug gap?For most racing applications, you usually want the plug gap to be between 0.020 and 0.040 of an inch. Most engine builders seem to settle around 0.035 of an inch. Factors such as the type of ignition you run, cylinder heads, fuel and even timing can affect how much gap will work best for you.
What should I GAP my NGK Spark Plugs?NGK doesn't recommend adjusting the plug gap more than . 008" in either direction. Beyond that slight adjustment, the ground electrode and center electrode won't align properly, hindering spark plug performance and drastically reducing plug life.
Do NGK plugs need to be gapped?While most NGK spark plugs are pre-gapped, there are occasions when the gap requires adjustment. Care must be taken to avoid bending or breaking off the fine-wire electrodes. NGK recommends a round wire-style or pin gauge gap tool to measure the gap.
How many spark plugs does a Mazda 6 have?Most cars have one plug per cylinder, so a four-cylinder engine will have four plugs, a six-cylinder engine will have six plugs, and so forth.
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