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hei conversion????

Discussion in 'Early CJ5 and CJ6 Tech' started by 69Rustj5, Dec 13, 2009.

  1. Dec 13, 2009
    69Rustj5

    69Rustj5 :)

    Logan, Ut.
    Joined:
    Sep 4, 2008
    Messages:
    55
    all right i did search but there is a bunch of info keeping from the knowledge i seek. i swear i saw some info about using a v8 hei distributor on an of v6. i have access to a dizzy off either a chevy or buick v8. but now cannot find find the needed info. if it was there in the first place. i may have just imagined the post i thought i could find.

    thanks in advance
     
    69Rustj5, Dec 13, 2009
    #1
  2. Dec 13, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Sep 22, 2002
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    8,360
    Never heard of that. You can convert an even fire V6 HEI for odd fire.
     
    Patrick, Dec 13, 2009
    #2
  3. Dec 13, 2009
    69Rustj5

    69Rustj5 :)

    Logan, Ut.
    Joined:
    Sep 4, 2008
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    that's what i was afraid of. i was most likely just dreaming.
     
    69Rustj5, Dec 13, 2009
    #3
  4. Dec 13, 2009
    jayhawkclint

    jayhawkclint ΜΟΛΩΝ ΛΑΒΕ

    Oklahoma City, USA
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    jayhawkclint, Dec 13, 2009
    #4
  5. Dec 18, 2009
    Rralphs

    Rralphs Old Member

    Nederland, Co
    Joined:
    Dec 12, 2004
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    270
    Seems to me that since an odd fire is a v8 with the front 2 cylinders cut off you could use the v8 HEI and just run the two extra spark plug wires to dumby plugs.

    It seems like I've seen this somewhere. Two spark plugs screwed into and aluminum block with the plug wires attached.
     
    Rralphs, Dec 18, 2009
    #5
  6. Dec 18, 2009
    jeeperneil

    jeeperneil New Member

    Owosso Mi.
    Joined:
    Nov 23, 2009
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    49
    Early 70's Buick 231 O.F. had HEI I pulled one from a 74 Apollo. But, haven't tried installing yet. I was told they are interchangable though.
     
    jeeperneil, Dec 18, 2009
    #6
  7. Dec 18, 2009
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    Mar 4, 2003
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    They are - you do have to watch the advance curve as it is different between the 225 and 231 - search for Vac Advance on HEI.

    As to a V8 cap on a V6 - no way possible - the degrees needed for ignition precludes 'space' for an additional couple cyls. Plugs must fire when they are supposed to in the degree arc or the fuel is not detonated properly.

    A V8 cap on a V6 is a good way to bend rods or do other perminante damage to the engine.
     
    Warloch, Dec 18, 2009
    #7
  8. Dec 19, 2009
    1969k10

    1969k10 New Member

    Clarks Hill, IN
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    Oct 5, 2009
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    I either had the same dream, or read the same article. If memory serves, they were saying the distributor base is the same. The difference was just the cap
     
    1969k10, Dec 19, 2009
    #8
  9. Dec 19, 2009
    mike starck

    mike starck Member

    salem,oregon
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    In regards to Warloc's mention of difference in advance curve,i recently found a very good article by a tuner from the corvette club. "google distributor vacuum advance" and look for "corvette club.org.also follows with extensive specs on many GM point type as well as hei dist. vacuum controls.

    mike s.
     
    mike starck, Dec 19, 2009
    #9
  10. Dec 19, 2009
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    The cap is different but also the the shaft is different. The reluctor wheel inside the distributor has 8 points for the V-8 to fire the 8 cylinders and the spacing is different than the 6 cylinder because of the degrees of crank rotation between firings just like Warloch mentioned. You could change the cap and reluctor wheel out but by that time you're just about in a whole distributor anyway.
     
    nickmil, Dec 19, 2009
    #10
  11. Dec 19, 2009
    Daryl

    Daryl Sponsor

    Bonney Lake, WA
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    Only the aluminum housing is the same.
     
    Daryl, Dec 19, 2009
    #11
  12. Dec 19, 2009
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    You can actually use the coil pick up, the wiring, and the module too, but that's about it.
     
    nickmil, Dec 19, 2009
    #12
  13. Dec 22, 2009
    jayhawkclint

    jayhawkclint ΜΟΛΩΝ ΛΑΒΕ

    Oklahoma City, USA
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    and the dust cover.
     
    jayhawkclint, Dec 22, 2009
    #13
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