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Thread: bbc 598

  1. #1
    Join Date
    May 2007

    bbc 598

    any ideas on spark plug type and heat range got 598 ci single dominators in 38 top gun ant sug thanks

  2. #2
    Platinum Member Platinum Member MER Performance's Avatar
    Join Date
    Jul 2008
    Little River SC
    How about the type heads you have and comp.ratio probably alum. with a crush washer type plug and a flat top piston or inverted dome you can start with a R5673A-8 this is an NGK I use this plug on all my SC and natural engines and is safe to start with as long as you are not trying to cover up a problem with A/F ratio or idle problems. 92 octane and timing about 35 degrees btdc.

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