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Correct spark plug on ADA head for SJ

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  • Correct spark plug on ADA head for SJ

    What is the correct spark plug for a stock 701 engine with the ADA girdle head along with 37cc domes. The rest of the setup is:

    Riva freeride dry pipe, ported carbs, carbon fiber reeds, reed spacer, reed stuffers, concord 13/17 cutback, work grate and UMI rideplate, Freestyle cone.

    The whole thing will be running on 91 octane, in ontario (canada )

    If you are recomending something different from stock equivelent, please elaborate.


  • #2
    BR8ES should be fine.
    Brooks @ ADA Racing
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    • #3
      I thought the stock one was NGK B7HS, I understand the R is for resistance but the # 8 you recomended is it because the heat range will be different on a head with 170# of compression?


      • #4
        The #8 is one heat range cooler. This is a safe choice when runner higher compression and an aftermarket pipe. Too hot of a heat range on the plug can lead to pre-ignition problems.
        [email protected]


        • #5
          Thanks, thats the answer I was looking for (I was 99 % sure, but not 100%)