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  1. #1
    Join Date
    Mar 2018
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    9
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    Spark plugs for a 6.4L stroker with a 2.9L whipple

    I’m looking for some spark plug recommendations for my motor. I’m not planning on crazy boost or anything like that. But I do expect to easily be in the 8-900 hp levels. I was thinking one temp range cooler than whatever a stock Hellcat or demons spark plugs are. Preferably NGK, just for ease of getting them from Canada

  2. #2
    Join Date
    Mar 2016
    Location
    N. GA
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    From Edelbrock E-Force Blower 1534/15340 installation instructions for a 2011-2014 Eagle 5.7L Hemi

    NOTE: For vehicles driven competitively or in an aggressive
    manner, Edelbrock recommends the use of the following,
    colder, spark plugs:

    NGK IX Iridium 6619 LFR6AIX-11 @.028 (Washer Gasketed Seat)

    NGK IX iridium 2315 LZTR6AIX-13 @.028 (Tapered Seat)

    For normal street driving, stock equipped spark plugs,
    re-gapped to .028” are sufficient.
    2013 Dodge Charger R/T Plus, Edelbrock E-Force 2300TVS 6.8 PSI, 450hp/459tq, Corsa CatBack, 3.06 Open Diff, Severe Duty Radiator, Dual Fans, OE Oil Cooler, Pursuit BR9 Brakes.



  3. #3
    Join Date
    Mar 2018
    Posts
    9
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    Hey, thanks for the info. Everything I’m seeing says 6 is the heat range for hellcats, demons, boosted cars etc. I think I’m going to try the NGK 2309 LFR7AIX. It’s a 7 heat range which in the NGK world is one range cooler I think



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