spark plug gap
+ Reply to Thread
Page 1 of 3 1 2 3 LastLast
Results 1 to 14 of 37

Thread:
spark plug gap

  1. #1
    Senior Member
    Join Date
    Mar 2009
    Location
    WHITTIER CA
    Posts
    534

    Default spark plug gap

    getting a couple different answers from people on what i should gap my plugs to
    its a blown bbc with a mag and 10lbs a boost spinning 6800.
    any ideas?

    thanks in advance

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member Hass828's Avatar
    Join Date
    Dec 2007
    Location
    okie, lake Texoma
    Posts
    6,278

    Default

    Quote Originally Posted by SCSRIVERRAT View Post
    getting a couple different answers from people on what i should gap my plugs to
    its a blown bbc with a mag and 10lbs a boost spinning 6800.
    any ideas?

    thanks in advance
    .020
    "if we keep doing it the same way we always do..we will always get the same results"
    H8-2-W8
    [email protected] first pass

  4. #3
    Senior Member jockorace's Avatar
    Join Date
    Feb 2008
    Location
    Whitewright, TX
    Posts
    3,359

    Default

    Always gapped my plugs at .018 and cut the tips back to the electrode C/L . Then Autolite eventually came out with the tips pre-cut. (Autolite AR 3934) Jocko

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Ain't Right Racin piston in the wind's Avatar
    Join Date
    Dec 2010
    Location
    Sapulpa ok
    Posts
    1,706

    Default

    I've allways ran 19-20 mag or msd

  7. #5
    Senior Member bwurst1's Avatar
    Join Date
    Nov 2008
    Location
    Roseville CA.
    Posts
    379

    Default

    Pardon my ignorance, but does it make a difference if its a Mag or MSD setup? IDK just asking not trying to be a smartass. If so, Why? what would be ideal for MSD?

  8. #6
    Ain't Right Racin piston in the wind's Avatar
    Join Date
    Dec 2010
    Location
    Sapulpa ok
    Posts
    1,706

    Default

    Quote Originally Posted by piston in the wind View Post
    I've allways ran 19-20 mag or msd
    My bad I just assumed it was alc. I have no clue on Gas.

  9. #7
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Quote Originally Posted by bwurst1 View Post
    Pardon my ignorance, but does it make a difference if its a Mag or MSD setup? IDK just asking not trying to be a smartass. If so, Why? what would be ideal for MSD?
    Yes it matters. No self respecting MSD user would close a plug gap down to 18-20 thou. Tight for an MSD would be .030, with .040 not of of the question. Any wider on a blown deal, depending on the boost, you risk firing the adjacent cylinder instead of the one you want. The spark will jump to the next cylinder in the cap because it is easier.

    But then, no self respecting mag user will utter the letters MSD in a church. To a mag user, MSD is the flithiest 3 letter word in the english language



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3

  10. #8
    Senior Member
    Join Date
    Jun 2010
    Posts
    2,924

    Default

    Quote Originally Posted by gn7 View Post
    yes it matters. No self respecting msd user would close a plug gap down to 18-20 thou. Tight for an msd would be .030, with .040 not of of the question. Any wider on a blown deal, depending on the boost, you risk firing the adjacent cylinder instead of the one you want. The spark will jump to the next cylinder in the cap because it is easier.

    But then, no self respecting mag user will utter the letters msd in a church. To a mag user, msd is the flithiest 3 letter word in the english language
    ouch

  11. #9
    Member Boat 104's Avatar
    Join Date
    Jan 2009
    Location
    San Marcos, Ca
    Posts
    524

    Default

    You did not mention what type of mag your using, I run a Vertex have found that 15 works best for me.

  12. #10
    Senior Member
    Join Date
    Mar 2009
    Location
    WHITTIER CA
    Posts
    534

    Default

    i run a vertex mag on gas.

  13. #11
    Senior Member 500BBC's Avatar
    Join Date
    Jan 2008
    Location
    CIUDAD MEXICO NORTE
    Posts
    6,008

    Default

    Quote Originally Posted by gn7 View Post
    Yes it matters. No self respecting MSD user would close a plug gap down to 18-20 thou. Tight for an MSD would be .030, with .040 not of of the question. Any wider on a blown deal, depending on the boost, you risk firing the adjacent cylinder instead of the one you want. The spark will jump to the next cylinder in the cap because it is easier.

    But then, no self respecting mag user will utter the letters MSD in a church. To a mag user, MSD is the flithiest 3 letter word in the english language
    So what would you recommend as optimum for MSD, 12#'s on AV.
    I never could get a straight answer from MSD.
    "Pot had helped, and booze; maybe a little blow when you could afford it. Not smack, though" President Barack Obama.

    Liberals just chose to ignore relevant information about the world they live in, and then call themselves sophisticated for having chosen to be more stupid than God made them.

  14. #12
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    No tighter than .030, and there appears to be no advandage going wider. I used to gap mine at .040 but have since back it down to .035. I think there is more to be gained from trimming the ground electrode back and rounding it off than there is in a wider gap. Besides, .035 is a flame thrower compared to that pissy little .015-.018 from a mag




    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3
    Last edited by gn7; 08-26-2011 at 02:40 PM.

  15. #13
    Senior Member bwurst1's Avatar
    Join Date
    Nov 2008
    Location
    Roseville CA.
    Posts
    379

    Default

    The reason for trimming and rounding is so the spark is directly exposed to the air/fuel concoction? Is that right? wondering if there's more to it then that. I run mine @.035 without trimming. If there's more there to be gained, I'm all ears. Thanks gn7.

  16. #14
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Thats the idea. Plus the spark can jump to an edge easier than to the flat under side of a standard electrode. Seems to make the biggest gains in NOS deals, with boosted engines gaining some as well.

    Be fore warned, the plugs do not last as long! The "edge" of the ground electrode rounds over pretty quick, and the center electrode does as well. The near edge of the center electrode looks mitered of quick. The advandage is short lived.



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3
    Last edited by gn7; 08-26-2011 at 02:52 PM.

+ Reply to Thread
Page 1 of 3 1 2 3 LastLast

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in

Tags for this Thread

Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95