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MSD Question

  1. #1
    Senior Member
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    Default MSD Question

    Just installed a MSD 6 Series, have model 8550 1 Dist. Getting not power to orange wire on coil. Had phoned MSD eariler today for some assistance as instructions did not match my set up. Was told to do the following, large red wire goes to battery, large black wire to batt. negative. Orange wire goes to positive on coil and small black to coil negative. Violet wire goes to blk and orange on dist and green goes to blk and purple on dist. Not getting any power to orange wire on coil....no spark. Any ideas? Thanks

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  3. #2
    Senior Member lbhsbz's Avatar
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    This is the spam section...but hopefully Admin will move it.

    MSD setups do not give you constant power to the coil + with the key on like a non-MSD setup. Picture it is kindof a dual coil setup...except the first coil is a capacitor in the MSD unit. The MSD box pulses the coil +.

    If it's a 6 series box...

    The Big red goes to the battery + (even though they tell you not to use a fuse...use one anyway)
    The big black goes to battery negative
    The small red goes to the key hot...hot when key is in "crank" and "on" position
    The black/orange go to the coil...orange is coil +

    The other 2, green and violet, go to the distributor....you might need to switch these 2 wires as MSD has a habit of sticking them in the connector incorrectly. It'll run like shit and pop and do wierd stuff.

  4. #3
    Senior Member steadymobbin's Avatar
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    what amp fuse? kinda important

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  6. #4
    Senior Member lbhsbz's Avatar
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    I use a 20amp

  7. #5
    Senior Member Mash on It's Avatar
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    Just a FNG Question...
    Why run a MSD system? Pros, Cons Etc..?

  8. #6
    Senior Member lbhsbz's Avatar
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    I run one for the rev limiter and because an hei wouldn't fit behind my tunnel ram

  9. #7
    Senior Member Mash on It's Avatar
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    My sbc has an oddball prestolite? unilite? electronic ign dizzy
    havent been able to find a cap and rotor, been looking for 3 years.
    i heard it was bought out by accel Idk...........(need tunnel ram)

  10. #8
    Certified Wildman! Sanger Flatbottom's Avatar
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    lbhsbz nailed it with his wiring id... you need the small red wire to be key hot, that's what turns the box on. Without it you are turned off.
    Everything electrical has smoke in it.... and it's not done till you let the smoke out!

  11. #9
    Senior Member lbhsbz's Avatar
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    Quote Originally Posted by Mash on It View Post
    My sbc has an oddball prestolite? unilite? electronic ign dizzy
    havent been able to find a cap and rotor, been looking for 3 years.
    i heard it was bought out by accel Idk...........(need tunnel ram)
    I believe prestolite/mallory are the same company...call 'em up and see if they can help

  12. #10
    Senior Member 787chuck's Avatar
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    Quote Originally Posted by Mash on It View Post
    My sbc has an oddball prestolite? unilite? electronic ign dizzy
    havent been able to find a cap and rotor, been looking for 3 years.
    i heard it was bought out by accel Idk...........(need tunnel ram)
    some times ford or morpar parts are the same

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