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SPARK PLUG CHANGE

Discussion in '308/328' started by Kvnhpnr, Aug 22, 2022.

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  1. Kvnhpnr

    Kvnhpnr Karting

    Jan 7, 2022
    59
    Pennsylvania
    Full Name:
    Kevin Scott Hepner
    #1 Kvnhpnr, Aug 22, 2022
    I am getting ready to change the spark plugs in my 86 328 GTS and wanted to find out what are the best plugs to use...NGK? Bosch? I want to go with iridium and not sure which are best. Should the plug wires be changed along with the plugs or can they be done later?
     
  2. Milkshaker0007

    Milkshaker0007 Formula Junior

    Sep 22, 2012
    432
    Midlands,uk
    Full Name:
    Paul
    #2 Milkshaker0007, Aug 22, 2022
    I’ve had iridium plugs in mine since I owned my 328 with no issues.
     
    maurice70 and miketuason like this.
  3. cbmcdona

    cbmcdona Karting
    Silver Subscribed

    Jul 19, 2022
    150
    North Carolina
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    Caleb McDonald
    #3 cbmcdona, Aug 22, 2022
    As you have a 328, and most likely have plug extenders without internal resistance, the NGK BPR6IX is probably a good choice. The iridium plugs last longer and are more resistant to fouling and the 6 heat range seems like the most common choice in these cars for street driven vehicles.


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  4. miketuason

    miketuason F1 World Champ
    Owner Silver Subscribed

    Feb 24, 2006
    15,811
    Cerritos, CA.
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    Mike
    #4 miketuason, Aug 22, 2022
    Same here NGK BPR7EIX Iridium
     
    GordonC likes this.
  5. GordonC

    GordonC F1 Rookie
    Owner Rossa Subscribed

    Aug 28, 2005
    4,163
    Calgary, AB, Canada
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    Gordon
    #5 GordonC, Aug 22, 2022
    I'm using these same NGKs, 7 heat range.

    Gordon
     
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  6. Iain

    Iain F1 Rookie

    Jan 21, 2005
    3,321
    UK
    #6 Iain, Aug 22, 2022
    For 328s use NGK DR8EIXs and forget about them


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  7. Kvnhpnr

    Kvnhpnr Karting

    Jan 7, 2022
    59
    Pennsylvania
    Full Name:
    Kevin Scott Hepner
    #7 Kvnhpnr, Aug 23, 2022
    Than you to everyone for all you advice, I will let the mechanic working on know
     
  8. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,822
    30°30'40" N 97°35'41" W (Texas)
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    Steve Magnusson
    #8 Steve Magnusson, Aug 23, 2022
    You guys are mixing apples and oranges:

    NGK BPR (14mm thread) = for 308

    NGK DR (12mm thread) = for 328

    The good news is that the 328 Microplex ignition can fire the coldish stock "8", DR8EIX, 328 plugs well, and we've had zero discussion about needing to use something else on a 328 (I'm with Iain on this). Maybe going to DR7EIX for always street (not Autobahn) use is OK, but I wouldn't go to "6" -- JMO.
     
    Rifledriver likes this.
  9. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,105
    Cowboy Capitol of the World
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    Brian Crall
    #9 Rifledriver, Aug 23, 2022
    A 6 is too hot for any injected car. A 7 is OK but it calls for 8 and see no reason not to use them.
     
    maurice70 likes this.

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