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Thread: What are the best spark plugs for a SWB 2.0 Normal?

  1. 05-09-2023, 04:21 PM #1
    mshaver51
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    What are the best spark plugs for a SWB 2.0 Normal?

    Trying to make #11880001 roadworthy, and we've decided to install new spark plugs.

    What plugs does the Early S community suggest are the best?

    Dependability and function are the top priorities.

    Any suggestions?
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  2. 05-12-2023, 07:17 AM #2
    304093
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    Hi,
    I've had my 1966 911 for 20 years.
    I've had good luck with the Bosch W3DPO, but these can foul with carbon over time. When that happens, I clean them and put them back in.
    Trouble is, they are very expensive, $30 per plug, and they're hard to find too.
    They are basically the latest version of the original platinum plug that came on the early 911s.

    When I had my engine restored, it came back to me with Bosch F4CS plugs.
    I bought a set of these last year on Ebay for much less, sorry I can't remember how much I paid. They were like $6 a piece.

    Ignition plays a role, of course. If you are running an MSD electronic trigger box (or similar), you don't need the 3s. You can run a copper plug, 6 or even 7 if you have a hotter spark.
    Hope this helps and that I did not kick the hornet's nest.
    All the best,

    Mitch
    Mitch M.
    Early 911S Registry Member #3603
    Maryland, USA
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  3. 05-16-2023, 01:44 PM #3
    66S
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    I like NGK BP7ES. I used them in my 67N with no CD and I had no fouling problems, still use them in my CD equipped 911s.
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  4. 05-23-2023, 02:37 AM #4
    John Fusco
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    Quote Originally Posted by 66S View Post
    I like NGK BP7ES. I used them in my 67N with no CD and I had no fouling problems, still use them in my CD equipped 911s.
    Same - with MSD

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