Spark plug question
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This is a discussion on Spark plug question within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Are there any spark plugs that can improve performance? By the way I have an 06 WRX. Any input would ...

  1. #1
    gil
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    Spark plug question

    Are there any spark plugs that can improve performance? By the way I have an 06 WRX. Any input would be appreciated,thanks.

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    Registered User section9's Avatar
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    I don't know that it'll improve performance, but different ones have different service lives. I've got Iridiums. Lasts the longest of the bunch I believe. I'm sure there's several old threads on this subject. Try searching.
    Last edited by section9; 04-21-2007 at 11:37 PM.
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    Registered User Botat1725's Avatar
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    Copper spark plugs are known to be the best performing, however you will need to change them very often, and spark plug changing is no easy task in a wrx. So iridiums are your best bet.
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    Registered User bcyb1029's Avatar
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    Keep in mind that your stock plugs are NGK Iridiums.
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    Registered User section9's Avatar
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    Huh, no kidding? Mine came with platinums (02) and I tell you, that was so much a pain in the a** to replace them!
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    Registered User koogxone's Avatar
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    stock plugs are NGK iridiums? really? o_o

    well they should be fine for now then. if you start to mod and increase your performance onestepcolder iridiums aren't a bad idea.
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    gil
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    Quote Originally Posted by koogxone View Post
    stock plugs are NGK iridiums? really? o_o

    well they should be fine for now then. if you start to mod and increase your performance onestepcolder iridiums aren't a bad idea.

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    gil
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    I've got 16k now , when should I change them?

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    Registered User rr1911's Avatar
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    Quote Originally Posted by gil View Post
    I've got 16k now , when should I change them?
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    Mace Windu devilfluff's Avatar
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    Quote Originally Posted by bcyb1029 View Post
    Keep in mind that your stock plugs are NGK Iridiums.
    My stock plugs were NGK double platinums. I looked up the part # off the plug on NGK's website

    I replaced them w/ iridiums, though.

    BTW- maintenance interval for plugs is 60k on our vehicles(2002 at least)
    Last edited by devilfluff; 04-24-2007 at 10:04 AM.
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    Resident meany-rator 06wrx4me's Avatar
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    Are one step colder plugs necessary at stage 2?
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    Mace Windu devilfluff's Avatar
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    Quote Originally Posted by 06wrx4me View Post
    Are one step colder plugs necessary at stage 2?
    They are not necessary at stage 2.

    I'm not sure at what point they become necessary, but I would install them w/ a turbo swap.
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    Registered User koogxone's Avatar
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    the maintenance interval for our cars' spark plugs is really 60k? i've heard everywhere that it was 30k.. strange
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    Registered User Sooby-Doo's Avatar
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    I posted this in another thread but I just want to make sure everyone knows so they don't get screwed because YES, changing those plugs is a *****!

    **************

    Just make sure when you get your plugs, if you get NGK Iridiums, DO NOT get the ones with a -11 at the end of the code. They are gapped to .44. You need them gapped around .28-.30. Can't gap Iridiums as they will either break or bend at an unsafe angle which compromises spark.

    The same code, just no -11. The 6's are stock and 7's are a step colder.

    I'm only mentioning this because all the Discount/Advanced Autoparts, and any other hardware/auto stores have the -11 code listed in their system and will inadvertently sell you the wrong ones.

    Get: BKR7EIX

    DO NOT GET: BKR7EIX-11

    *****************

    I partially disagree with devilfluff, but only partially. I'm Stage 2 and have the one step colder NGK Iridiums. Are they necessary, no not really. Are they beneficial at Stage 2? That really depends on where you live and how you drive. (IMO)

    I'm in Tampa, FL and drive "spirited" on most occassions. Ambient heat combined with engine heat = lots of heat = beneficial. Now if your in North Dakota and drive your grandmother to her dr.s appointments, well I guess what the hell are you doing at Stage 2 j/k If you live in really cold weather you probably are not going to want them unless you change your plugs before winter as they can make for some rough starts in cold weather. All of that being said, one step is not an extreme difference and usually isn't an issue either way.
    Last edited by Sooby-Doo; 08-13-2007 at 08:14 AM.
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  16. #15
    Mace Windu devilfluff's Avatar
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    Quote Originally Posted by koogxone View Post
    the maintenance interval for our cars' spark plugs is really 60k? i've heard everywhere that it was 30k.. strange
    As a general rule, copper spark plugs are changed every 30k(the 2.5RS's fall in this category), while platinum/double platinum(WRX)/Iridium are changed at between 60k and 100k intervals.

    I looked up the interval on Mitchell-On-Demand to confirm it.

    Remember, dealer recommended service intervals may not match manufacturer recommended service intervals.

    Changing the plugs early will not be harmful to the engine, so if it makes you feel more comfortable go for it.
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