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  • 1 Post By HOSS429

Thread: MSD Rookie Question
          
   
   

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  1. #1
    Rdobbs1977's Avatar
    Rdobbs1977 is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: 1972 Z28 Camaro Drag Car,2500lbs w/motor
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    MSD Rookie Question

     



    I'm a guy who's pretty comfortable with wiring but no knowledge expert with MSD. Getting ready to give our 383 its first go at a fire up, break cam in, etc within a few days. This car has an MSD 6AL box. We ran some preliminary checks today and found no power at the blaster 2 coil using a test light when we flipped the IGN toggle switch. Did a little reading on MSD and found this:

    Quote: One common question in regards to MSD Ignition controls is “Why isn’t 12V power on the orange (COIL +) wire?”
    The main reason 12V won’t be present at coil + is because your MSD ignition is a Capacitive Discharge Ignition. Like all CD ignitions they use a large capacitor to discharge 420-480 Volts to coil + and coil – will normally be connected to ground. (That’s why you wont see +12V on coil +)
    Most all stock ignitions are Inductive Ignitions, these will normally be connected to the + 12V ignition switch to coil + and coil – is connected to Points or the Factory Electronic Module. (That’s why you’ll see +12V on coil +)

    So does that sound right? I should not be showing hot at the coil with test light, due to running MSD? Thanks
    1972 Z28 Camaro, Full Drag Car, 383 CID
    1976 Camaro
    Currently building a 1.21 Gigawatt Flux Capacitor

  2. #2
    HOSS429's Avatar
    HOSS429 is offline CHR Member Visit my Photo Gallery
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    i`ll check my stang tomorrow ..its battery is in my truck and BAMA is about to play ...
    NTFDAY likes this.
    iv`e used up all my sick days at work .. can i call in dead ?

  3. #3
    HOSS429's Avatar
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    checked mine just now .. it's only hot at the + coil when i trip ( fire) the dizzy by hand ..makes sense .. the coil should only fire when the dizzy tells it to ...
    iv`e used up all my sick days at work .. can i call in dead ?

  4. #4
    Rdobbs1977's Avatar
    Rdobbs1977 is offline CHR Member Visit my Photo Gallery
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    Hey Hoss and Denny--Thanks for chiming in and checking into things! Much appreciated
    1972 Z28 Camaro, Full Drag Car, 383 CID
    1976 Camaro
    Currently building a 1.21 Gigawatt Flux Capacitor

  5. #5
    HOSS429's Avatar
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    you will love the MSD .. for the first 20 years of my hot rodding life i depended on mostly stock ignitions or the occasional dual point stuff and fouled out a set of plugs every two months . but a friend put me on a simple blaster 2 coil upgrade on my over cammed and over carbed 460 Tbird and i rarely had to change out fouled plugs .. i went with the MSD 6A box and have never fouled a plug since ..
    iv`e used up all my sick days at work .. can i call in dead ?

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