gapping plugs
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This is a discussion on gapping plugs within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; so i got bought bkr7eix -11 should i leave em at 1.1 or change it? im going one step colder ...

  1. #1
    Registered User sxcrxy's Avatar
    Join Date
    Nov 2011

    gapping plugs

    so i got bought bkr7eix -11 should i leave em at 1.1 or change it? im going one step colder and ive never changed plugs on this car since i bought it im running 21psi

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  3. #2
    zax is offline
    Super Modulator zax's Avatar
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    Nov 2008
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    I'm assuming the units are in millimeter? 1.1mm is 0.028", and according to my tuner, modified EJ205s should be running 0.028-0.032". I believe I'm gapped at 0.030".
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  4. #3
    Registered User teflon_jones's Avatar
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    Apr 2007
    8000' up in Colorado
    Leave them alone. Gapping plugs is something that went out with the dinosaurs and is very rarely necessary, and when it is, it's usually only on a very highly modified/tuned car.
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