crank trigger verse mag trigger

Discussion in 'PSI Superchargers Tech Questions' started by terry p, Oct 16, 2016.

  1. terry p

    terry p Member

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    are there any performance gains running off a crank trigger over the mag trigger
     
    #1
    terry p, Oct 16, 2016
  2. Mike Canter

    Mike Canter Top Dragster
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    Most mag drives are unstable and cause the timing to fluctuate. This could be as much as plus or minus 1 degree meaning you could have up to degrees fluctuation. Depending on the type and condition of the mag drive it could be more or could be less. In a car like a NHRA promod one degree of timing is around 100 HP so the answer to your question is yes there will be a power gain but how much depends on how much power you are making and the type and condition of your mag drive
     
    #2
    Mike Canter, Oct 16, 2016
  3. TADHemiracer

    TADHemiracer Member

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    There may be a performance improvement on the crank trigger because if the cam shims are not clearanced right, the cam may walk back and forth changing the mag trigger timing. Crank trigger timing doesn't change.
     
    #3
    TADHemiracer, Oct 16, 2016
  4. hotrod796

    hotrod796 New Member

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    How much end play do you allow for a cam in a hemi? My timing was jumping way more than a single degree before I put the crank trigger on.
     
    #4
    hotrod796, Nov 1, 2016
  5. aj481x

    aj481x Member

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    You have to use the crank trigger, MSD used to have a video on their mag site showing the difference.
     
    #5
    aj481x, Nov 2, 2016
  6. TAFC577

    TAFC577 Member

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    camshaft endplay should be between .002 and .010 . and do not use any shims under .010 thick as it will just spit them out . before switching to a crank trigger our timing would fluctuate about 5 degrees .
     
    #6
    TAFC577, Nov 4, 2016
  7. DQUES

    DQUES Member

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    The first time I used a timing light to check the timing using a trigger I could not believe how stable the timing was . Never looking back .
     
    #7
    DQUES, Nov 4, 2016

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