Made in USA and Free Shipping on all orders shipped inside the US.
Made in USA and Free Shipping on all orders shipped inside the US.
Page 1 of 2 12 LastLast
Results 1 to 15 of 28

Thread: MS6 Spark Plugs & Spark Plug Gap

  1. #1
    Registered Member


    Join Date
    Feb 2009
    Posts
    18

    MS6 Spark Plugs & Spark Plug Gap

    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:
    NGK Laser iridium ______ .032 ___________ ~$14 _______ 0 _______ ILTR6A-8G

    Denso Iridium _________ .031 __________ ~$10 _______ -1 _______ ITV22
    Denso Iridium _________ .031 ___________ ~$10 ______ -2 _______ ITV24


    Anything else is Gapped Incorrectly. Adjust at your own risk

    - Available on the Internet -
    Denso Iridium _________ .044 ___________ ~$10 _______ 0 _______ ITV20
    NGK iridium IX _________ .044 ___________ ~$14 ______ -1 _______ LTR7IX-11
    NGK Laser iridium ______ .052 ____________ ~$12 _______ 0 _______ ILTR6A-13G

    - Prescribed by your Local Parts Store. Don't let them sell you this junk -
    Autolite Dbl Platinum __ .051 ___________ ~$6 _________ 0 _______ APP5364
    Autolite XP Iridium ___ .051 ____________ ~$7 _________ 0 _______ XP5364
    Pulstar Pulse __________ .025 _________ ~$25 ________ 0 ________ EF-1



    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
    - A colder plug should be gapped smaller to about.28 to avoid knocking
    - The Manual recommends a gap of .28-.31

    - Gap should never be adjusted with a coin style tool, to avoid breaking the delicate tip.
    - Tolerances for adjusting gap are only about .008 each way.
    - The NGK LTR7IX-11 and Denso ITV20 are gapped at 0.44, close enough to adjust to .35, but this is almost 2x the recommended max adjustment distance, and may or may not work. This is because of stress tolerances in the metal and more importantly, the angle created when bending the tip. The anode (ground electrode) should be parallel to the tip to ensure even sparking around the perimeter of the tip directly upward. If you want to go colder, get a Denso that is already properly gapped.
    - The plugs (autolite, etc) available at all three local auto supply stores are gapped to .050-.054 in. Don't even think about it.


    UPDATES
    So, I've since learned that the factory plug is NGK ILTR6A-8G, .032 gap
    Also, NGK has some excellent documentation on their plugs. They have charts showing application for every vehicle, comparing other brands to their equivalent, and their naming convention. Just search for it.
    The part number indicates the type of plug, temperature, thread size, and gap.

    NGK Part naming chart
    http://www.ngksparkplugs.com/techinf...tnumberkey.pdf
    Last edited by neoshade; 03-31-2012 at 10:20 AM. Reason: Answered final questions STICKY THIS!

  2. #2
    Registered Member

    07 M3s Hatch

    Join Date
    May 2009
    Location
    Richmond, VA
    Posts
    584
    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.
    07 - Mz3 Hatch - KW V1 - Whiteline - Amsoil - River City Synthetics

  3. #3
    Registered Member tunersteve's Avatar
    Donated: $10

    2011 Mustang GT

    Join Date
    Dec 2004
    Location
    Downriver, Michigan
    Posts
    13,419
    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.
    Steve
    2011 Mustang GT Premium
    430 rwhp / 409 rwtq

    Have a question - PM me

  4. #4
    手前の言葉が俺は聞き捨てよう TheMAN's Avatar


    Join Date
    Oct 2002
    Location
    Dallas, TX
    Posts
    5,859
    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!
    TheMAN
    '01 BJFP MT
    '05 BK3P HB AT
    '16 BMYFS AT

    For Protege and Mazda3 info, come see the Protege FAQ

  5. #5
    Registered Member


    Join Date
    May 2009
    Posts
    23
    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 by jkunze; 07-28-2009 at 10:30 AM.

  6. #6
    Registered Member tunersteve's Avatar
    Donated: $10

    2011 Mustang GT

    Join Date
    Dec 2004
    Location
    Downriver, Michigan
    Posts
    13,419
    Anyone running the AP should be on a set of ITV22s gapped to .028 per their site.
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  7. #7
    nom nom Evolved's Avatar

    2006 Mazdaspeed 6 GT

    Join Date
    May 2009
    Location
    St. Louis, MO
    Posts
    453
    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.
    Lucas--

    --LPM 2006 Mazdaspeed 6 GT--
    //Cobb SRI//Cobb TIP//ITV22's//JBR SSP+SSB//SLS TP//AWR MM//VG Shark Fin//Autoexe CF Grill//PIAA Ion Yellow Fogs

    Previous cars: BMW 323ci, Mitsubishi Evo VIII, Nissan 240sx w/ SR20DET

  8. #8
    Registered Member OJ Bartley's Avatar


    Join Date
    Feb 2008
    Location
    Toronto, Ontario
    Posts
    755
    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.
    2006 Whitewater Pearl Mica Mazdaspeed6 GT
    Bridgestone Potenza RE760 225/45/18 ● SU Rear Engine Mount ● Moog Adjustable Ball Joints ● COBB APv3
    808 Subwoofer Pre/EQ ● Audiolink USB MP3 Player ● Interior LED conversion ● Prosport 52mm Boost Gauge
    Nokya Hyper Yellow fog bulbs ● Speedie6 TIP ● TWM Stage II STS ● VG Shark Fin Antenna

  9. #9
    Jack of all trades. Blendercloud's Avatar
    Donated: $15

    2007 Mazdaspeed 6 Sport

    Join Date
    Apr 2009
    Location
    St. Louis, MO
    Posts
    2,409
    Quote Originally Posted by OJ Bartley View Post
    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.
    Chris

    2007 Mazdaspeed 6

    Paypal, TrustWho, and Who Am I? verified, with a positive iTrader rating of 19.

  10. #10
    nom nom Evolved's Avatar

    2006 Mazdaspeed 6 GT

    Join Date
    May 2009
    Location
    St. Louis, MO
    Posts
    453
    Quote Originally Posted by OJ Bartley View Post
    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.
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  11. #11
    Registered Member tunersteve's Avatar
    Donated: $10

    2011 Mustang GT

    Join Date
    Dec 2004
    Location
    Downriver, Michigan
    Posts
    13,419
    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.
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  12. #12
    Jack of all trades. Blendercloud's Avatar
    Donated: $15

    2007 Mazdaspeed 6 Sport

    Join Date
    Apr 2009
    Location
    St. Louis, MO
    Posts
    2,409
    Quote Originally Posted by tunersteve View Post
    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.
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  13. #13
    Registered Member pakman6's Avatar

    2006 Mazdaspeed 6 GT

    Join Date
    Aug 2009
    Location
    Houston, TX
    Posts
    152

    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,
    pakman

  14. #14
    ah crap Aricjm15's Avatar
    Protege Garage AV Rep

    05 MSM

    Join Date
    Aug 2002
    Location
    Grayslake Il
    Posts
    4,655
    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.

  15. #15
    Nip Slip! BoostedSpd6's Avatar
    Donated: $10

    MazdaSpeed 6

    Join Date
    Jul 2007
    Location
    Plant Earth
    Posts
    3,271
    excellant choice..u wont be disappointed.

Page 1 of 2 12 LastLast

Similar Threads

  1. Spark plug help!
    By Mazdaspeedfreak in forum Protege5
    Replies: 6
    Last Post: 06-12-2009, 08:09 PM
  2. 02 sim spark plug #
    By Phoenix5 in forum Mazda Protege
    Replies: 7
    Last Post: 09-10-2006, 02:50 AM
  3. Spark plug gap
    By BOOSTR in forum Other Mazdas
    Replies: 0
    Last Post: 12-10-2005, 12:49 AM
  4. Spark plug gap on new plugs.
    By boostidazfuk in forum Mazdaspeed Protege
    Replies: 19
    Last Post: 09-25-2003, 04:54 PM
  5. ADVICE on Spark Plug Wires + Plugs
    By zcast in forum Mazda Protege
    Replies: 9
    Last Post: 09-24-2003, 03:08 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •