who is running MRL (BAM) Lifters without lifter bore sleeves

Discussion in 'Small Block Mopar Engine' started by davescuda, Jul 2, 2018.

  1. davescuda

    davescuda FABO Gold Member FABO Gold Member

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    Who is running MRL (BAM) Lifters without lifter bore sleeves
    Any issues?

    I am having oil pressure issues, wondering if this maybe my problem.
     
  2. clinteg

    clinteg Well-Known Member

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    Running the Pro Plus lifters. I have about 10-15 psi idling and increases with engine rpm. No issues yet.
     
  3. xLURKxDOGx

    xLURKxDOGx "An angel fat, at satan's feast"

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    That’s low, new engine?

    Jake
     
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    • davescuda

      davescuda FABO Gold Member FABO Gold Member

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      Yes that is what I have also agree way to low
       
    • davescuda

      davescuda FABO Gold Member FABO Gold Member

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      What do you have at 3500 rpm?
      What do you have for oil pressure cold
       
    • clinteg

      clinteg Well-Known Member

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      Yes it was a fresh build. Had oiling mods done in the block when I had it rebuilt. Oil pressure didn’t run that low before and the changes in the rebuild were lifters and the oiling mod. So one of the two caused the oil pressure to be lower at idle than before I suspect. When it’s cold, idle is around 30 or 40 I think. It’s been a while since I’ve looked at it cold so don’t quote me on that. But I raised this concern to the engine builder. He didn’t particularly like that it was that low but he also said that it wasn’t a concern if it was only that low at idle. He was more concerned with the pressure at mid to WOT which it stays around 60-70 psi hot. It’s made around 20-25 passes and the rest us been street driving. But even street driving she’s hitting 7200 rpm frequently. Have checked the bearings and they looked great. So the low oil pressure at idle no longer bothers me. It has good oil pressure where it counts and that’s good enough for me.
       
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      • yellow rose

        yellow rose Doctor of Thinkology.

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        Are you running needle bearing rockers?
         
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        • davescuda

          davescuda FABO Gold Member FABO Gold Member

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          My motor is new. I don't think its right.
          I am not, I am running norris rockers.
          My oil pressure warmed up is 12 to 15 at idle and Not wide open throttle(did not want to do it) usual oil pressure goes up fast when give it good amount out throttle fast not so on mine is 40 psi 3500 to 4000.
          Think about taking out the MRL lifters and installing comp 828-16 may need new push rods
           
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          • davescuda

            davescuda FABO Gold Member FABO Gold Member

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            I should have bushed my lifter bores after all the ready i have been doing.
            Just seeing if any body did anything different like increasing oil pump pressure(shimming the spring)
             
          • rumblefish360

            rumblefish360 so close yet so far away

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            That is a good idea. EZ-2-do.
             
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            • Wyrmrider

              Wyrmrider Well-Known Member

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              shimming the spring will not help
              hv pump
               
            • oldkimmer

              oldkimmer Well-Known Member

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              I had to shim the spring in my hv pump on my 440 engine. Was 20 lbs at 1200. Now 30 lbs. 90 when cold. 75-80 down the track. Kim
               
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              • davescuda

                davescuda FABO Gold Member FABO Gold Member

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                Are you running MRL lifters?
                 
              • oldkimmer

                oldkimmer Well-Known Member

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                I was running Morel, who made the bam lifters. No bushings. On a side note my 470 stroker is not bushed either but I use the comp 829s. Oil pressure is 100 cold. 60 at idle warm and over 90 down the track. The motor was built in 1998. Had new lifters and valve springs in 2013. Kim
                 
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                • 512Stroker

                  512Stroker We are all here because we are not all there.

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                  Why do you think the Comp lifters will be better?
                   
                • clinteg

                  clinteg Well-Known Member

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                  Harland Sharp Rockers
                   
                • oldkimmer

                  oldkimmer Well-Known Member

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                  I don’t know if the 829s are better per se but the lifter bores may be a little less worn. The rockers are the MP blue 1s from the late 90, no needle bearings. Same as the crane golds. Maybe the stroker hv oil pump is some how better or maybe because the stroker was professionally built and the 440 was home built. Kim
                   
                • yellow rose

                  yellow rose Doctor of Thinkology.

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                  That's how you are getting by with that low oil pressure at idle. If you were running a rocker without needles it would already be toast.
                   
                • oldkimmer

                  oldkimmer Well-Known Member

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                  I agree with YR. I get nervous anything less than 50 lbs at idle in a hot street/ race engine cause u have way less pressure/ volume to the rockers. Kim
                   
                • famous bob

                  famous bob mopar misfit

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                  Wouldn`t the needle bearing rockers allow more bleed out than bushed ? I`ve read that all my life!! Lowering pressure. The needles will let more oil out , lowering pressure / the way I see it .
                  I run the bamm ? lifters from MRL. Same oil pressure, but mine goes up w/ rpm. the higher the rpm , the more it goes up. Like clintege, I did an oil mod., and have been trying to calm it down since, w/o pulling the engine apart, may have it now.
                  I have heard, all my life that 10 pounds per thousand is fine, I have more than that, but not a whole bunch more at hot idle. Altho my cam/engine set up seems to like a 1150 idle. My hot 406 sbc , w/ this same came liked to idle the same way. I don`t have sleeved bores either.
                   
                • moper

                  moper FABO Gold Member FABO Gold Member

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                  Just thinking out loud here but if you're still oiling the top end via the cam bearing the restriction isn't the rockers - it's something in the cam/cam bearing/timing area. Needles need less oil to operate, at least IMO. I will enlarge the passages and chamfer the holes in the cam, and chamfer the back of the cam bearing to allow more oil upstairs while still maintaining some control over the volume going up there.

                  Dave - if the pressure does not rise quickly and stay higher - mods or not - you have a problem. What are the clearances and oil pump/system you're running?
                   
                • 68 HEMI GTS

                  68 HEMI GTS Well-Known Member

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                  829’s work real well in unbushed blocks. Everything else seems like a crap shoot depending on base circle, max lobe lift, & block tolerances.
                   
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                  • davescuda

                    davescuda FABO Gold Member FABO Gold Member

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                    solid body
                     
                  • davescuda

                    davescuda FABO Gold Member FABO Gold Member

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                    oil pump is m72hv rod clearance .0025 mains .003
                    Here is the lifters come just one small hole to oil the bearing. BAm 3 holes

                    6C279FD9-F09B-4588-B366-79CB1583A4DD.png

                    EBA697F9-CF18-4443-80BC-3BEBBB5C5422.png
                     
                    Last edited: Jul 3, 2018
                  • oldkimmer

                    oldkimmer Well-Known Member

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                    What u running for oil. Should be at least 15/40 or 20/50 with that clearances. Kim