Pro mag 12 timing

Discussion in 'PSI Superchargers Tech Questions' started by OUTLAW225, Jul 18, 2015.

  1. OUTLAW225

    OUTLAW225 New Member

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    Hi all, I'm running a 451 cube KB short deck Hemi, Brad 3 fat heads, 14/71 with 23% od 30psi, now I'm swapping from a supermag 3 running 28* timing to a pro mag 12, do these have a better spark where less timing needed? We want to put a little more boost in aswell before next meet to 27% od.

    What's people's thoughts
     
    #1
    OUTLAW225, Jul 18, 2015
  2. Mike Canter

    Mike Canter Top Dragster
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    Non MSD ProMags retard when under load as much as 3 degrees. MSD ProMags have a compensation circuit that keeps timing stable so the ignition timing needs to be retarded from your 28*. I would not have more than 26* and would recommend starting off with 24 to 25 degrees.
     
    #2
    Mike Canter, Jul 18, 2015
  3. WIZBANG

    WIZBANG Member

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    Mike, not sure I understand ? " Non MSD ProMags " ??? Are these an imitation MSD mag ?????
     
    #3
    WIZBANG, Jul 19, 2015
  4. Mike Canter

    Mike Canter Top Dragster
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    Talking about Mallory Supermags. MSD ProMags have a timing compensation circuit in the Points Box to make the timing not change when the mag is under load. So with your Supermag you might have had 28* set in it but as soon as it went under extreme load during the run you were most likely only at 25* on timing and that is why with a MSD ProMag you need to be at 25*
     
    #4
    Last edited: Jul 19, 2015
    Mike Canter, Jul 19, 2015
  5. WIZBANG

    WIZBANG Member

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    Understood, Thanks !
     
    #5
    WIZBANG, Jul 19, 2015
  6. SoDak

    SoDak Active Member

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    I believe this is true for any points mag, like Vertex, Cirello, Mallory, etc
     
    #6
    SoDak, Jul 20, 2015
  7. Mike Canter

    Mike Canter Top Dragster
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    That is true.
     
    #7
    Mike Canter, Jul 20, 2015

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