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    Author Topic: What Spark Plug to Run?  (Read 1660 times)

    Offline Denison636

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    • Posts: 352
    What Spark Plug to Run?
    « on: September 04, 2015 - 02:13:14 AM »
               So I just got news that my motor is done today. It is a 416 with 11.6:1 compression with a little cam. Cam specs are in the pic. The heads casting numbers are in a pic to. The heads are ported and so is my eddy jr intake. 2.02" intake and 1.60" on exhaust. Going to be running E-85 in it on the street. I also have a rev-n-nator box on it with a msd coil and billet distributor. The carb is a 750 that flows over 800 cfm. Also has hooker full length headers with 2-1/2" coming out the side.
                So the question is what spark brand and size should I run with this set up. I know things have changed and would like to know.
    Thank you
    Logged
    Its just a little 340 with a miss


    Offline cudabob496

    • Sr. Resident
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    • Posts: 8024
    Re: What Spark Plug to Run?
    « Reply #1 on: September 05, 2015 - 03:04:15 AM »
    what kinda heads are they?
    Logged
    72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

    1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

    2011 Kawasaki Z1000

    Offline Denison636

    • Jr. Member
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    • Posts: 352
    Re: What Spark Plug to Run?
    « Reply #2 on: September 06, 2015 - 01:14:43 PM »
    The above picture is the only casting number. I think they are mopar performance. But truth be told I am not sure.
    Logged
    Its just a little 340 with a miss

    Offline cudabob496

    • Sr. Resident
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    • Posts: 8024
    Re: What Spark Plug to Run?
    « Reply #3 on: September 06, 2015 - 03:00:54 PM »
    are they aluminum?
    Logged
    72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

    1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

    2011 Kawasaki Z1000

    Offline cudabob496

    • Sr. Resident
    • ******
    • Posts: 8024
    Re: What Spark Plug to Run?
    « Reply #4 on: September 06, 2015 - 03:27:34 PM »
    measure the depth of your threaded spark plug hole
    Logged
    72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

    1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

    2011 Kawasaki Z1000

    Offline cudabob496

    • Sr. Resident
    • ******
    • Posts: 8024
    Re: What Spark Plug to Run?
    « Reply #5 on: September 06, 2015 - 03:45:57 PM »
    notice this has a .375 reach, whereas plugs for aluminum
    heads have a 3/4 reach, as far as I know. I use NGKs.


    http://www.summitracing.com/parts/ngk-3332/overview/make/plymouth/model/cuda
    Logged
    72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

    1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

    2011 Kawasaki Z1000

    Offline Denison636

    • Jr. Member
    • **
    • Posts: 352
    Re: What Spark Plug to Run?
    « Reply #6 on: September 07, 2015 - 01:43:33 AM »
    Thank you. I'll get some coming.
    Logged
    Its just a little 340 with a miss

    Offline Denison636

    • Jr. Member
    • **
    • Posts: 352
    Re: What Spark Plug to Run?
    « Reply #7 on: September 07, 2015 - 01:49:03 AM »
    The heads are cast iron and uses all stock hardware. I am still new to the mopar game and still have lots to learn.
    Logged
    Its just a little 340 with a miss
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