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  1. #1
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    spark plugs for supercharged applications

    after years of experience which spark plugs are recommended for a supercharged engine like the 5,9?
    5,9 67kmiles, a lot of speed goodies

  2. #2
    Modfag Saleen4971's Avatar
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    autolite 3923 or 3922 if you still have ping issues. ive always used the 3923's with no issue.
    Ross
    1998 Grand Cherokee 5.9 Limited
    MPP Headers - Thunderbolt Metallic Cat - 3" Mag catback - EBC Brakes w/ drilled Rotors - 4bbl M1 - Vortech 12psi - Built trans & 2900 stall - Ford 8.8 - Addco & Hellwig Sways - Poly Bushings - H&R Springs - Grabber UHP Tires - Alpine/Infinity Stereo - FX-R BiXenon Retrofit

  3. #3
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    thx. I will change my APP5224.
    5,9 67kmiles, a lot of speed goodies

  4. #4
    Modfag Saleen4971's Avatar
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    def dont want platinum plugs with FI
    Ross
    1998 Grand Cherokee 5.9 Limited
    MPP Headers - Thunderbolt Metallic Cat - 3" Mag catback - EBC Brakes w/ drilled Rotors - 4bbl M1 - Vortech 12psi - Built trans & 2900 stall - Ford 8.8 - Addco & Hellwig Sways - Poly Bushings - H&R Springs - Grabber UHP Tires - Alpine/Infinity Stereo - FX-R BiXenon Retrofit

  5. #5
    Member NoTime's Avatar
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    Quote Originally Posted by Saleen4971 View Post
    autolite 3923 or 3922 if you still have ping issues. ive always used the 3923's with no issue.
    This is all I run in my SC one as well,,,,,,,,,
    1998 ZJ 5.9 Platinum - 408 SC Sleeper ( 7.49 / 11.? )
    2012 RAM - Tow Vehicle
    2007 GC SRT8 Daily Driver
    2003 TJ Rubicon Inca Gold - Trail blaster
    1973 Trumph GT6 MK III
    20 Ft Enclosed Car Hauler

  6. #6
    Member Comanche County's Avatar
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    Good info thanks!
    Current fleet: 98' 5.9, 51' CJ3A, 53' M38, 89' MJ

  7. #7
    Member scjeep4.7HO's Avatar
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    I run a NGK Iridium plug.
    Big ASS supercharged 4.7L HO, cammed, Custom Made Supercharger COG drive system, 72mm F&B throttle body, ROSS ceramic coated pistons, Billet H beam rods, 1st set of race prepped big valves heads W/ behive springs, Custom one off sheet metal intake, Modified Edelbrock Mustang intake elbow, ATI super dampner, 3,000 Edge racing billet stall converter, meth injected, SCT tuned, 39# injectors, 2 bar map, Turbo Smart Race Port BOV, 180* T stat, True dual exhuast, Built tranny W/ deep trans pan, built transfer case, 275 60 R17 rubber.

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