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  1. 11-03-2022 08:08 AM #1
    A4orce84
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    Chipped 1.8T - NGK BKR7EIX-11 Spark Plugs Still The Best?

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    Hello Everyone,

    Just as the post states, are the NGK BKR7EIX-11 spark plugs still recommended for an APR Stage 1+ 1.8T (with R8 / 2.0T coils)? I'm starting to get a bit of misfiring under heavy boost and with the cooler weather, I figured swapping out my plugs is an easy early diagnosis step.

    Thanks in advance to everyone for your time and help, it is greatly appreciated.
    Last edited by A4orce84; 11-03-2022 at 10:56 AM.
    USP CLUB MEMBER #101

    2004 A4 1.8T USP - APR Stage 2+, Mototec Sport Exhaust w/AWE downpipe, Valeo Clutch Kit, 2.0T FSI Coils, EVOMS Diverter Valve, Boosted Intake, B5 S4 Front Brakes, RNS-E + Bluetooth Module, VMR 708s (RS4 Reps), Boost Brothers FMIC, '02 OEM Sport Suspension + B5 Front Perches, PODi, JHM Solid Short Shifter, JHM Solid Linkage Upgrade, and a lot more stuff!
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  2. 11-03-2022 09:49 AM #2
    Puddin Tane
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    I don't have your tune, but when I tried those plugs the center electrodes eroded like crazy and I started getting misfire codes within 15K miles. Pull a plug or two and have a look at them. Rounded, pitted center electrode? Gap way bigger than spec? Re-gapping clears up the misfiring? So I switched to these and have had no problems since. Both electrodes are made of the most non-reactive precious metal there is.
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  3. 11-03-2022 10:12 AM #3
    old guy
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    The NGK BKR7EIX-11 is not really the correct plug. The -11 indicates an 1.1mm gap (.043"). The standard NGK BKR7EIX comes with a .8mm gap (.031"). It wouldn't be a bad idea to reduce it even a little more. I typically run a .7mm gap (.028").
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  4. 11-03-2022 10:17 AM #4
    itsmatt33
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    still prefer the copper NGK. have to change them out every 5k. and as old guy said have them gapped at .028
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  5. 11-03-2022 10:19 AM #5
    Puddin Tane
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    P.S.-- my coil packs are bone stock. Yours make a hotter spark, which would make the problem worse.
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  6. 11-03-2022 10:51 AM #6
    A4orce84
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    Quote Originally Posted by old guy View Post
    The NGK BKR7EIX-11 is not really the correct plug. The -11 indicates an 1.1mm gap (.043"). The standard NGK BKR7EIX comes with a .8mm gap (.031"). It wouldn't be a bad idea to reduce it even a little more. I typically run a .7mm gap (.028").


    Thanks Fletcher! I was going off memory and what people in this post recommended with the 2.0T coils:
    https://www.audizine.com/forum/showt...e905115e/page3
    USP CLUB MEMBER #101

    2004 A4 1.8T USP - APR Stage 2+, Mototec Sport Exhaust w/AWE downpipe, Valeo Clutch Kit, 2.0T FSI Coils, EVOMS Diverter Valve, Boosted Intake, B5 S4 Front Brakes, RNS-E + Bluetooth Module, VMR 708s (RS4 Reps), Boost Brothers FMIC, '02 OEM Sport Suspension + B5 Front Perches, PODi, JHM Solid Short Shifter, JHM Solid Linkage Upgrade, and a lot more stuff!
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  7. 11-03-2022 10:54 AM #7
    A4orce84
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    Quote Originally Posted by Puddin Tane View Post
    I don't have your tune, but when I tried those plugs the center electrodes eroded like crazy and I started getting misfire codes within 15K miles. Pull a plug or two and have a look at them. Rounded, pitted center electrode? Gap way bigger than spec? Re-gapping clears up the misfiring? So I switched to these and have had no problems since. Both electrodes are made of the most non-reactive precious metal there is.
    I've had zero issues with these NGK BKR7EIX-11 plugs since installing them in 2017.
    USP CLUB MEMBER #101

    2004 A4 1.8T USP - APR Stage 2+, Mototec Sport Exhaust w/AWE downpipe, Valeo Clutch Kit, 2.0T FSI Coils, EVOMS Diverter Valve, Boosted Intake, B5 S4 Front Brakes, RNS-E + Bluetooth Module, VMR 708s (RS4 Reps), Boost Brothers FMIC, '02 OEM Sport Suspension + B5 Front Perches, PODi, JHM Solid Short Shifter, JHM Solid Linkage Upgrade, and a lot more stuff!
    Reply With Quote Reply With Quote  
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