Rocker Arm

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  • bartx7001
    Junior Member
    • Mar 2012
    • 21

    #1

    Rocker Arm

    What brand is the best stock looking 1.5 ratio rocker arm. I have heard that some are only 1.38 to 1.44 instead of 1.5. Who makes a jig to measure them.
  • mod71m
    Senior Member
    • Jun 2007
    • 393

    #2
    The only rocker arms that I have ever measured to be a perfect ratio are Mid-Lift rockers. Back when I was using some of them in the late 90's and early 2000's their pin in the roller tip seemed to have a tendancy to want to work out. I quit using them due to that.

    jim miller, jim miller rockers, JM Miller, mid-lift, mid-lift rockers, mid-lift advanced rocker arm tech, advanced rocker arm tech, MEI, PVS, MRE, miller engineering, miller rocker arms, miller mid-lift, miller rockers, roller rockers, roller rocker arms, valve half lift, precision valve trains, racing engine tech, racing engine components, cylinder head tech, rocker arm tech, camshaft tech, advanced technical information, precision geometry, installed geometry, design geometry, mid-lift patent, rocker ratio, racing engines, cylinder heads, racing components, engine builders, mid-lift history, racing products, jim miller contact


    Stick with high end name brand stuff and they are typically pretty good. Comp Cams, Crane, Crower, Jessel, T&D, etc.

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    • SLM98
      Senior Member
      • Sep 2009
      • 407

      #3
      Do not use these rockers nothing but trouble. The ones i had galled the rocker balls.

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      • HINKSON AUTO
        Junior Member
        • Jan 2016
        • 18

        #4
        Originally posted by SLM98 View Post
        Do not use these rockers nothing but trouble. The ones i had galled the rocker balls.
        I had the same results years ago and there roller rockers fell apart all that stuff is junk.

        Comment

        • RCJ
          Senior Member
          • Nov 2007
          • 509

          #5
          When I was running stock rockers.I put every rocker on no.1 cylinder and checked it with a degree wheel and dial indicator.It was not uncommon the find rockers with lower ratios.

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          • mod71m
            Senior Member
            • Jun 2007
            • 393

            #6
            I want to clarify that I'm not a fan of those rockers either due to durability issues. They are the only ones I've found to be perfect on the ratio however.

            For stock type stamped rockers the Manley's seemed pretty good. At least they were back in the early 2000's. I haven't built an engine with stamped rockers for quite some time so I don't know if they are still good quality or not.
            Last edited by mod71m; 03-23-2016, 10:49 AM.

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            • HINKSON AUTO
              Junior Member
              • Jan 2016
              • 18

              #7
              Stamp steel rockers from Elgin seem to work pretty good they have a double nitrated rocker. They seem to be reliable for a stamp steel rocker.

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