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Thread: spark plugs

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    centralfloridasc1's Avatar
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    spark plugs

    whats a good spark plug for a near stock setup? I know NGK coppers are my best bet, but what heat range and gapping?

    Intake and exhaust.
    99 sc1 dohc swapped mp2 with 50-75 shot of zex and megasquirt in progress

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    Ubiquitous Administrator Donnie's Avatar
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    NGK or AC Delco. .040

    Ethanol and Boost: My Anti-Drugs.

    2016 Chevrolet Colorado LT - HNNNNGG.
    1999 Ford Dangah Rangah XLT - Junk haulin' junker-slut.
    1998 Saturn SC2 - Garbage. Pure, unadulterated, unapologetic, garbage.
    Gone: 2004 POSRT4 - 372/425 @ 20psi, "Super safe tune" --- 4xx/4xx @ 26psi, "BAMF Tune"
    Next: 1990 Supra "LOLNOJZ" - LSx, 4L80E, Megasquirt, whole lot of Ethanol, whole lot of snail...

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    6S Moderator S.Bretz's Avatar
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    DOHC has a heat range of 5 on NGK plugs

    SOHC uses a heat range 4 on NGK ( on step hotter than the DOHC).
    -6S Resident Mechanical Forensics member #001.
    1995 SC2 Turbo 3.6L DOHC, 6sp manual, Ford 8.8 rearend running on MS3x.
    1998 F-250 5.4L triton...stock.

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    centralfloridasc1's Avatar
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    thanks guys.
    99 sc1 dohc swapped mp2 with 50-75 shot of zex and megasquirt in progress

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    Autozone.com has all this info.

  6. #6
    Administrator PurdueGuy's Avatar
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    Yeah, just go to a parts store that sells NGK plugs & have them look them up.
    SaturnSeries.net Owner
    '99 SC2 Project Car build thread

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    centralfloridasc1's Avatar
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    yeah i hate relying on those types of information though. It's like ebay where they say it'll work on your car, but not very well or without modification. I like advice from experience.
    99 sc1 dohc swapped mp2 with 50-75 shot of zex and megasquirt in progress

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    About Spark Plug Heat Range

    Bumping this thread to add new relevant information:

    Understanding Spark Plug Heat Range by Engine Builder Magazine
    https://www.enginebuildermag.com/201...ug-heat-range/

    SPARK PLUG CROSS REFERENCE HEAT RANGE CHART
    https://www.briskusa.com/spark_plug_...at_range_chart

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