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MSD ignition box

Discussion in 'Early CJ5 and CJ6 Tech' started by wheelin69, Oct 2, 2008.

  1. Oct 2, 2008
    wheelin69

    wheelin69 Member

    Thorntown, IN
    Joined:
    Aug 24, 2008
    Messages:
    66
    Just wondering if a regular MSD 6A box would work with the stock Delco distributor on my 225, or if there is a separate part number for the oddfire? Guy that is selling it has a chevy truck, so definetly not oddfire.. I know that you can use the MSD with the HEI or a regular distributor, but if I got the MSD, would there be any reason to upgrade to an HEI? Thanks guys!

    *******
     
    wheelin69, Oct 2, 2008
    #1
  2. Oct 2, 2008
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
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    9,221
    No. There's a separate PN for the Odd Fire. It's here in the forum somewhere.

    If you can't find it I'll lift the hood when I get home tonight. :D
     
    sparky, Oct 2, 2008
    #2
  3. Oct 2, 2008
    wheelin69

    wheelin69 Member

    Thorntown, IN
    Joined:
    Aug 24, 2008
    Messages:
    66
    hmm, thats unfortunate, 'cause this looked like a good deal :-( eh well..
     
    wheelin69, Oct 2, 2008
    #3
  4. Oct 2, 2008
    68 swamper

    68 swamper New Member

    Slidell , Louisiana
    Joined:
    Feb 26, 2006
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    I do not have a odd fire but I was on MSD web site this morning, in there tech section I remember seeing some thing about the odd fire, not sure what it is but it might help.

    I put the 6A on my f134 and it made a big difference
     
    68 swamper, Oct 2, 2008
    #4
  5. Oct 2, 2008
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
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    4,275
    The 6A will work OK on just about any engine that is not an odd-fire, but it's way overkill IMHO. Look around on CL and eBay for a used 5A, they work just fine up to about 5-6k RPMs and they're lots cheaper!

    <edit> One on ebay now at ~ 26 bux...
     
    w3srl, Oct 2, 2008
    #5
  6. Oct 2, 2008
    wheelin69

    wheelin69 Member

    Thorntown, IN
    Joined:
    Aug 24, 2008
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    So the 5A that is $26 will work for an oddfire?
     
    wheelin69, Oct 2, 2008
    #6
  7. Oct 2, 2008
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
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    Long as it's for an Odd-Fire engine.

    Like I said, the PNs for the Odd-Fire MSDs are here in the forum. There's more than one. I have one, MOP (a board member that works with me) has another.

    It MUST be for an odd-fire engine for it to work. I'm not sure there's a 5 series for the Odd Fire.

    This might help too: https://www.msdignition.com/forum/showthread.php?t=3249

    And this: https://www.turbo-link.com/forum/showthread.php?t=12250

    Basically you gotta find a P/N#6246 for it to work. There are others...
     
    Last edited: Oct 2, 2008
    sparky, Oct 2, 2008
    #7
  8. Oct 2, 2008
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
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    4,275
    Unfortunately, no. :oops:

    According to posts on the MSD forums the difference between an even-fire MSD and an odd-fire MSD is the duration of the spark; an even-fire unit has a 20* spark duration whereas an odd-fire can only use 10* of duration. Also according to MSD you can use an odd-fire unit on an even-fire engine, but not vice-versa.

    Sorry for the confusion.
     
    Last edited: Oct 2, 2008
    w3srl, Oct 2, 2008
    #8
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