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Burning up coils ????

Discussion in 'The Hokey Ass Message Board' started by frankieC, Aug 7, 2013.

  1. frankieC
    Joined: Mar 2, 2009
    Posts: 217

    frankieC
    Member

    Need help guys !!!
    I keep burning up coils 351w with axcel elct. distributor just replaced my 4th' coil inabout 5 years what could be causing it

    Any HELP PLEAS

    Frankie C
    38sled
     
  2. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 25,272

    Jalopy Joker
    Member

    post pics of engine. has been threads on here about the importance of how to position one.
     
  3. frankieC
    Joined: Mar 2, 2009
    Posts: 217

    frankieC
    Member

    Its mounted on the inner fender well passenger side ????
     
  4. mechanic58
    Joined: Mar 21, 2010
    Posts: 681

    mechanic58
    Member

    Ever check the voltage at the + connection on your coil when your engine is running? Might be a good starting point.

    If its too high - that could be your problem.
     

  5. Fighter-of-Wars
    Joined: Nov 3, 2008
    Posts: 294

    Fighter-of-Wars
    Member

    You prolly need a resistor before the coil
     
  6. frankieC
    Joined: Mar 2, 2009
    Posts: 217

    frankieC
    Member

    Thanks guys anyone else (Bubba) ????
     
  7. hoop98
    Joined: Jan 23, 2013
    Posts: 1,363

    hoop98
    Member
    from Texas

    What coil are you running?
     
  8. Gearhead Graphics
    Joined: Oct 4, 2008
    Posts: 3,604

    Gearhead Graphics
    Member
    from Denver Co

    If it's upside down the electrons fall out ;)

    Though I guess there are SOME coils that are a bit picky about positioning.
     
  9. GassersGarage
    Joined: Jul 1, 2007
    Posts: 4,729

    GassersGarage
    Member

    I know the old Accel Super Coil required a ballast resistor before the coil. It's been decades since I've used one.
     
  10. Mr48chev
    Joined: Dec 28, 2007
    Posts: 27,530

    Mr48chev
    ALLIANCE MEMBER

    No resistor or resistance in the power feed to the coil to cut the voltage when operating sure sounds like it may be the cause.

    If it is a Super Coil the Jegs Add http://www.jegs.com/p/Accel/Accel-Super-Coil-Ignition-Coil/1732359/10002/-1 Says that it should come with a .85 ohm ballast resistor in the box meaning that they expect you to use the ballast resistor in the power feed to the coil.
     
  11. hoop98
    Joined: Jan 23, 2013
    Posts: 1,363

    hoop98
    Member
    from Texas

    But the earth is positive so it should repel them (the electrons).

    Back to reality, oil filled coils need to be mounted vertically, TU (Terminals Up).

    Premature coil failure is related to heat. Excessive primary current can be reduced by ballast resistance. Since the coil is making it a year or so a small ballast resistor like the .85 should make it live a long time.

    High load due to secondary resistance or plug gap will stress the coil also.
     
  12. frankieC
    Joined: Mar 2, 2009
    Posts: 217

    frankieC
    Member

    Thanks much all!!!!!
     
  13. hoop98
    Joined: Jan 23, 2013
    Posts: 1,363

    hoop98
    Member
    from Texas

    MSD 8214

    .8 OHM

    [​IMG]
     
  14. Ross6860
    Joined: Jul 27, 2013
    Posts: 9

    Ross6860
    Member

    What the others said. Mount upright, use a ballast resistor when running.

    Hint - Install a switch to bypass the ballast resistor while starting. Puts full battery voltage to the coil while cranking, which can fall off quite a bit due to the starter draw.

    You can install a relay to handle this automatically, or be cheap like me and install a three-position (SPDT) maintained switch under the dash. Run-Forward, Start-Back, Off-Middle. Doubles as a kill switch, too. About $4 plus wire.
     

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