Externally oiled head restrictor size.

Magnum Engine Swaps

  1. prochargedmopar

    prochargedmopar Well-Known Member

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    If mounting LA heads on a magnum what size restrictor would be required for external rocker shaft oiling?

    Anyone know what size Indy uses on their kit?
     
  2. RogerRamRod

    RogerRamRod The Older I Get, The Faster I Was

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    Watching
     
  3. rumblefish360

    rumblefish360 so close yet so far away

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    Considering MP suggests to enlarge the block passage for the heads to, ?11/32? I forget, that would be a close guesstimate I think.
     
  4. RogerRamRod

    RogerRamRod The Older I Get, The Faster I Was

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    My guess is 11/32 is for a LA block/head combo oil mod? Since that is a timed arrangement, (hole in cam lines up w/ hole in block) you are adding some volume. With a constant feed, I’m thinking you will have a retention pond going on up on top with an 11/32 “restriction”.
    I’m thinking we are looking in the neighborhood of 1/8 (or maybe even less). IF we are talking about the same thing, though I’ll be the first to admit that I often misunderstand where the conversation is going.
     
  5. rumblefish360

    rumblefish360 so close yet so far away

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    People have run full time oiling cam bearings before without issue.

    IMO, your over thinking this.
     
    • Agree Agree x 1
    • MopaR&D

      MopaR&D Research And Destroy

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      I'm trying to figure this out as well I have a thread in the SBM sub-forum... I'm using external oiling off the oil pressure sending port at the back of the block which is constant full pressure feed not timed like on a stock LA.
       
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