Spark Plug Gap and Correct NGK's???

Discussion in 'Engine' started by Timi, Apr 16, 2009.

  1. Timi

    Timi New Member

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    Hi Guys.

    I've done a search and brought this up in a related post but still no joy so thought i would create a thread as there doesn't seem to be a definitive answer.

    I'm looking at getting some NGK Iridium plugs for my EK9 (Stock B16B). I'm aware that the standard recommended heat range is 7 by Honda.

    The confusing part...

    NGK do two plugs that will fit the B16B application:

    BKR7EIX

    BKR7EIX-11

    The only difference being that the BKR7EIX-11 are pre-gapped to 1.1mm.

    What is the standard gap? I've been told that the gap on the none '11' plugs will be 1.0mm, so only 0.1mm less. I've seen both '11' and none '11' plugs recommended on this forum so the big question is:

    Do i need to use the spark plug which is pre-gapped to 1.1mm, or will the standard gap of 1.0mm (if this is the case) be perfectly fine to run with no detremental effects?


    Any help here would be greatly appreciated, i'm about to do a full service and want to make sure i'm getting the right bits.
     
  2. Tsuchinoko

    Tsuchinoko EG6

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    11 means that the gap is pre set from factory to 1,1mm.

    The stock gap for the B16B is 1,1mm the same to B16A and B18C.

    The original sparkplug for your engine is:

    NGK
    PFR7G-11

    So if you want to use NGK iridium use:
    NGK
    BKR7EIX-11
     
    rvm likes this.
  3. Timi

    Timi New Member

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    Ok thanks for the info. Would it be detremental to use the none '11' versions i.e. BKR7EIX? I have a set of these brand new currently but dont know whether the 0.1mm less gap will be at all harmful to the engine or performance.
     
  4. Tsuchinoko

    Tsuchinoko EG6

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    I only use 1.1mm gap.
     
  5. GTLVR82

    GTLVR82 Moderator

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    I got the NGK BKR6EIX-11's.....is that going to matter? I notice the 6 there where the 7 should be.
     
  6. abunai888

    abunai888 V-tec Addict!

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    bkr7e 11 is pre gaped to 1.1 oem gap and bkr7e is not
     
  7. rvm

    rvm admin Staff Member

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    The 6 you see there, is the heat range of the spark plug, oem type r motors uses spark plugs with a heat range of 7, this means, than the spark plug NKG BKR7 is colder than the NGK BKR6.

    My B18C came from japan with NGK BKR8 :nerv:
     
  8. Timi

    Timi New Member

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    thinking i should really get BKR7EIX-11 (1.1mm gap) even though it would probably run just fine on the standard plug gap. The spark from a 1.1mm gapped plug would apparently be stronger as its got further to travel. Gives better ignition. But on a really high compression engine or heavily boosted one the shorter gap would probably be safer to avoid any possibility of blowing the spark out.

    Does anybody know the best place to get 11's from the UK. Spark-Plugs.co.uk are alright but still £38 a set, not bad but does anybody get them cheaper elsewhere?
     
  9. abunai888

    abunai888 V-tec Addict!

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    i use bkr7eix-11 its iridium plug i'm gonna change them for bkr7e
    as it's better to use a cheap fresh plug that you change every 5000km/h than keep
    an iridium plug for 40000+km/h...
     
  10. Andygoole

    Andygoole 97 EJ9 D14A4

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    Last edited: Feb 20, 2010
  11. Bon87

    Bon87 DC2 ITR Owner

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    putting down my post for future reference!
     
  12. ScottEKCoupe

    ScottEKCoupe New Member

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    Question here, maybe you could answer, I installed what I thought were correct plugs, they have a #6 heart range. Will this hurt the engine much or am I ok?
     
  13. Timi

    Timi New Member

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    i think you'd be ok with 6's and it's not going to cause any damage but due to the high compression a 7 will grant you more performance i imagine?

    correct me if i'm wrong anyone, and certainly if you believe 6's may cause problems!

    i'd use 7's next time tho bud
     
  14. Knightryder

    Knightryder New Member

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  15. 808Army

    808Army New Member

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    heat for ngk web site give u only 6 when searching for part number
     
  16. Szabb1

    Szabb1 New Member

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    I used BKR6E-11 NGK Iridium but now I bought BKR7E-N11, it is better in summer and high rpm too.
     

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