How does oil get to rockers with solid cam setup

Big Block A body Tech

  1. challenger57

    challenger57 cuda57

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    Before I finish assembling my solid roller cam roller rocker setup, how does the oil get to the rockers. I haven't ordered my push rods yet, are they to be hollow?
     
  2. IQ52

    IQ52 Well-Known Member

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    I think it involves really small foreign nationals, running through the rocker shafts with buckets of oil.

    Which rockers are you using? Most are oiled through the shafts. Jesel is oiled through the pushrods if I remember correctly.
     
  3. 71ChargerSE

    71ChargerSE Well-Known Member

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    Mopar oils through the rocker shafts.
     
  4. moparlover

    moparlover Well-Known Member

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    here is a picture for the A engines

    if someone has a B/RB engine oil system diagram please post it up!
     

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  5. johnparts

    johnparts Slammed 1

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    Chrysler has used a reverse oiling rocker to lifter set up for most of it's life building engines. Oil is fed to the rocker shaft which then transfers the oil down to the lifters.
     
  6. moparlover

    moparlover Well-Known Member

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    i'm pretty sure the A and B/RB pushrods are solid

    the magnum engines had hollows

    you probably should check with whoever makes your solid roller setup what is the correct pushrod

    what type of roller setup do you have?
     
  7. bOb shingler

    bOb shingler Well-Known Member

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    look closely at the pic in the lower right corner. that's to one head. when the cam passage rotates around to the bottom it sends oil to the other head. this takes oil away to the #4 main and to the #7&6 rods also. that is way they will starve at high rpm. if you look at the pic in the middle it shows one head being feed by the #2 cam bearing and this is WRONG. they are BOTH feed from the #4 cam journal on bb.
     
  8. bOb shingler

    bOb shingler Well-Known Member

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    look at the pic. you drill a hole down thru both head oiling holes and into the oil gallery on each side a little smaller then the tap for a small set screw. lock tight it in. next you can remove the #4 cm bearing and turn it upside down and reinstall it. then drill an 1/4" hole to feed the cam bearing,this way the #4main and #7&6 rods will not get starved of oil.
     

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  9. IQ52

    IQ52 Well-Known Member

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    ?!
     
  10. bOb shingler

    bOb shingler Well-Known Member

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    :wack:

    must be something new i didn't know about.
     
  11. magnumdart

    magnumdart There is a bad moon on the rise. FABO Gold Member

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    Must be a wrong word in here somewhere.
     
  12. Rocky_JS

    Rocky_JS 'cuda

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    guessing he probably meant that the oil hole in the shaft is down directly on the rocker unlike chebby.
     
  13. airwoofer

    airwoofer Drivetrain limit explorer

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    Ask Mike at MRL. He and I are kicking around the idea of building a big block. There is some kind of oil trick it will involve, but I don't know the details. I think 440 source sells the kit. There may be instructions on their website.

    [​IMG]

    [​IMG]

    Here is a pic I found on a post by Mike:
    http://www.forabodiesonly.com/mopar/showthread.php?t=154750

    [​IMG]
     
  14. moper

    moper FABO Gold Member FABO Gold Member

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    MRL's setup oils the shafts from the oil pressure sender passage at the rear of the block but maintains the path from the block up to the rocker stand. Indy's kits use the same pressure port but either feed the heads directly and up to the rocker stands, or use a spray bar and eliminate the shaft oiling altogether. There's not much difference in those setups except for the spray bar version but I know you need to meter the oil that goes up because it will literally flood the top end. There' a reason the factory only has oil flow for a few degrees per head per rotation. It doesnt take much...
     
  15. bOb shingler

    bOb shingler Well-Known Member

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    the indy kit has to be used with thier heads. that MRL kit is really nice and looks good too but the way i did the mod it only cost about .30 cents.
    i guess it's like if everyone take a different road they will all get to the same place eventually, it's just a matter of how much you have to spend for fuel.
     
  16. muddog

    muddog Well-Known Member

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    yes they are solid, they changed that in 1981 on the 360 (new style is hole thru push rod), just talked to my shop today and he explained just that to me today!!!!
     
  17. MRL Performance

    MRL Performance Well-Known Member

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    There is a reason why I dont do it like this. To many holes to close together in a high stress area. It invites cracks in the block and then you have real problems.

    Different views to solve the same problem.
     
  18. pishta

    pishta I know I'm right....

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    LA Rockers are fed oil by the shafts that get oil from the cam bearing. Lifters get oil from the lifter galleys. Magnum pedestal mount rockers get oil from the pushrods that get fed from the holes in the lifter seats, that get oil from the lifter galleys. At no time do the lifters get oil from the pushrods, unless you are talking about a later hydro slant six.
     
  19. itate

    itate Where is that wrench I just had in my hand?

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    Here you go, When I get near a machine with a scanner I'll post a better quality pic.
     

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  20. bOb shingler

    bOb shingler Well-Known Member

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    you don't need to, that is plenty clear.
     
  21. challenger57

    challenger57 cuda57

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    Bob S. you sent me a great pm and I went and talked to my block machine guy today and he verified your thoughts. Since this is a street motor and not track he assured me that the factory system is quite adaquit and gave me the the understanding I was looking for when I took one of my heads along for a better explaination. Thanks for everyones imput.
     
  22. moper

    moper FABO Gold Member FABO Gold Member

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    The only thing I'll add is I've found it common that the holes that go from the cam to the block in the cam bearings are not perfectly aligned with the holes in the block. So I'll add some chamfer to the backsides of the cam bearing to allow as much oil as possible per rotation to get into the passage. You can also partially or fully grove the cam journal. However either of those should be accompanied by drilling the cam-to-main saddle passage larger to make sure the main and rod bearings don;t suffer.
     
  23. Doosterfy

    Doosterfy Well-Known Member

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    What do you consider high RPM? I'm assembling the valvetrain on my 440 right now and I was not planning any mods to the oiling system/routing at all. I'm planning on spinning up to 6500 RPM.
     
  24. bOb shingler

    bOb shingler Well-Known Member

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    i would consider high rpm above 5500rpm's. your mileage my very.

    pic of the cheapo set screw plugs installed.
     

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