Thread: Which copper plugs on stock L32, 606 or 605?

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  1. #1 Which copper plugs on stock L32, 606 or 605? 
    I can't car too good. SaukRapids's Avatar
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    Are AL 605's gonna be too cold? .55 or .60 gap?
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  2. #2 Re: Which copper plugs on stock L32, 606 or 605? 
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    605s are good if you hammer the throttle a lot or live in a hot area. Just whatever stock gap is
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  3. #3 Re: Which copper plugs on stock L32, 606 or 605? 
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    Why not run iridiums for stock? Last way longer.
    2017 Buick Regal 2.0 Turbo (SOLD 2007 Grand Prix GT. Front and rear PLOGs, 1.8 roller rockers, CAI, HPTuned, 3.4 pulley, TEP transmission, 90# springs, rollmaster single chain, Impala front brakes d/s rotors.) Past (Pontiacs) Grand Prix- 97 GT, 03 GT, 04 GT, 04 Comp G, 78 Trans am, 92 Trans Am.
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  4. #4 Re: Which copper plugs on stock L32, 606 or 605? 
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    Easier to spark knock even stock with iridiums
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  5. #5 Re: Which copper plugs on stock L32, 606 or 605? 
    I can't car too good. SaukRapids's Avatar
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    I might give 605's a shot then. Thanks
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  6. #6 Re: Which copper plugs on stock L32, 606 or 605? 
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    What mods?

    If it's got intake/exhaust even 104's wouldn't be a bad choice.
    1999 Chevrolet Silverado K1500 Classic Z71 - Intake/Gibson Exhaust/20% Tint
    2004 Chevrolet Corvette MRM A4 - C5Z Suspension/AFE S2 Intake/TSP Catless LT's/3" ORX/C6 ZR1 Wheels
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  7. #7 Re: Which copper plugs on stock L32, 606 or 605? 
    I can't car too good. SaukRapids's Avatar
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    I got a cone on there. Exhaust is stock, no u-bend.

    The 104's worked alright. Kinda didn't realize we drove it over 20k already. Gonna give a range higher a try.
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  8. #8 Re: Which copper plugs on stock L32, 606 or 605? 
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    I ran AL103R's over 20k. They were a nice golden brown. Big misconception in this community is that colder plugs don't last a long time. While they are recommended to be changed every 20-30k, there isn't much of an issue with running them longer.
    1999 Chevrolet Silverado K1500 Classic Z71 - Intake/Gibson Exhaust/20% Tint
    2004 Chevrolet Corvette MRM A4 - C5Z Suspension/AFE S2 Intake/TSP Catless LT's/3" ORX/C6 ZR1 Wheels
    Sold WBody's: '98 GT, '98 GTP, '03 GTP, '05 GXP
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  9. #9 Re: Which copper plugs on stock L32, 606 or 605? 
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    On a stock motor or even mildly modded there's zero reason to go colder than 605
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  10. #10 Re: Which copper plugs on stock L32, 606 or 605? 
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    There isn't any real reason to not do it; either.

    It's a 3800.

    It doesn't give a sh1t.
    1999 Chevrolet Silverado K1500 Classic Z71 - Intake/Gibson Exhaust/20% Tint
    2004 Chevrolet Corvette MRM A4 - C5Z Suspension/AFE S2 Intake/TSP Catless LT's/3" ORX/C6 ZR1 Wheels
    Sold WBody's: '98 GT, '98 GTP, '03 GTP, '05 GXP
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  11. #11 Re: Which copper plugs on stock L32, 606 or 605? 
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    Gas mileage for one. Lol. If you're buying plugs might as well buy the rights ones lol
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  12. #12 Re: Which copper plugs on stock L32, 606 or 605? 
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    If you notice gas mileage difference by putting colder plugs in, then I don't know what to tell you. I never noticed a damn difference. And if you're talking 1-2 MPG; you can make that up by driving style; easily.
    1999 Chevrolet Silverado K1500 Classic Z71 - Intake/Gibson Exhaust/20% Tint
    2004 Chevrolet Corvette MRM A4 - C5Z Suspension/AFE S2 Intake/TSP Catless LT's/3" ORX/C6 ZR1 Wheels
    Sold WBody's: '98 GT, '98 GTP, '03 GTP, '05 GXP
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  13. #13 Re: Which copper plugs on stock L32, 606 or 605? 
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    And you know what happens when you run richer? You lose mpg
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  14. #14 Re: Which copper plugs on stock L32, 606 or 605? 
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    Or just not put the wrong plugs in in the first place and not have to make up for anything with driving style?
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