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Thread: NGK spark plug gapping required?

  1. 03-03-2016, 08:16 AM #1
    Kaleid
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    NGK spark plug gapping required?

    Pardon what might be a stupid question as I've seen some different answers but is it necessary to gap NGK BP7ES plugs for a 2.2 engine? If so, what gap setting would be ideal for a stock 2.2S engine?

    Thanks!
    1974 MFI Carrera
    1992 Carrera RS

    S Reg #1245
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  2. 03-03-2016, 08:54 AM #2
    304065
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    Depends on your ignition system. 1mm-1.5mm with MSD.
    1966 911 #304065 Irischgruen
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  3. 03-03-2016, 09:01 AM #3
    Kaleid
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    Thanks John- my car has the standard CDI so I'm guessing it would be different?
    1974 MFI Carrera
    1992 Carrera RS

    S Reg #1245
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  4. 03-03-2016, 10:46 AM #4
    ejboyd5
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    If expending the labor necessary to replace a set of spark plugs I can't imagine skipping the simple step assuring that the gaps are correct.
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  5. 03-03-2016, 11:22 AM #5
    304065
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    I think the reason the OP is asking is that a lot of modern plugs come pre-gapped for convenience. Use 0.028" to 0.032"
    1966 911 #304065 Irischgruen
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  6. 03-03-2016, 12:14 PM #6
    Kaleid
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    Quote Originally Posted by 304065 View Post
    I think the reason the OP is asking is that a lot of modern plugs come pre-gapped for convenience. Use 0.028" to 0.032"
    Exactly- thanks very much!
    1974 MFI Carrera
    1992 Carrera RS

    S Reg #1245
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  7. 03-04-2016, 10:33 AM #7
    RSTarga
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    For a copper plug 0.7mm
    platinum 0.55mm
    David

    '73 S Targa #0830 2.7 MFI rebuilt to RS specs
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  8. 03-04-2016, 10:48 AM #8
    lars1965
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    I have the original kettering (no cdi)system on my november 66 911 , is 0.75mm the general advice?

    Lars
    1967 911 Bahama Yellow
    1962 356 TB 6 Slate Grey
    1982 911 SC gone
    1965 911 gone
    1968 911L gone
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  9. 03-05-2016, 11:54 AM #9
    ESully
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    For '66,
    Bosch W250P21 .35mm/.014in
    NGK BR7ES .032mm
    http://www.partcat.com/ngk
    E Sully
    1973.5 911T
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  10. 03-05-2016, 12:51 PM #10
    edmayo
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    If I'm not mistaken the 250 P21 is the old style platinum, don't think they were out yet in 66. I first recall them being used with the first MFI motors.
    Early S Registry member #90
    R Gruppe member #138
    Fort Worth Tx.
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