1. 2 fast z28

    2 fast z28 Active Member

    Messages:
    31
    Likes Received:
    3
    Joined:
    Apr 16, 2013
    Location:
    wisconsin
    Local Time:
    2:40 AM
    hi guys just got my mancini racing rocker arms and I have a few questions the rocker arm shafts do I put the oil holes up or down also how much play should the rockers have from the rocker arm and spacers any help would be great oh yeah they are going on a set of trick flow 240 heads also
     
  2. beanhead

    beanhead FBBO Gold Member FBBO Gold Member

    Messages:
    3,082
    Likes Received:
    4511
    Joined:
    May 18, 2014
    Location:
    Wackyfornia
    Local Time:
    12:40 AM
    Oil holes point down and towards the valves, not towards the pushrod side. A small amount of side-to-side play is okay as long as the pushrod and valve contact areas don't get out of whack..I used some Comp Cams hold-downs with a shim spacer on the end of each shaft (for a total of 4 on the engine) to hold mine still because the OEM stuff that was in there was letting my rockers move too much, causing some bad wear. I replaced all of them with a new set of (thicker USA made) plain old stamped steel ones, swapped out the OEM style hold downs (that have the little nibs on the sides) to the comp hold downs, and it's been good ever since.
     
    • Agree Agree x 1
    • 2 fast z28

      2 fast z28 Active Member

      Messages:
      31
      Likes Received:
      3
      Joined:
      Apr 16, 2013
      Location:
      wisconsin
      Local Time:
      2:40 AM
      NEED HELP so im installing my rocker arms and trying to figure out what size push rods I need, my trouble right now its that I set up my push rod checker and rotate the engine over and look at the pattern on the valve stem and the pattern is off centered towards the exhaust port I bought shims from mancini to raise the rocker arm shaft found out that didn't help made it worst is there any way to get my pattern towards the intake side or the head one guy told me to try lash caps on the top of the valve stem and adjust from there my thinking is that is the same as raising the rocker arm shaft any help would be great the parts I have are trick flow 240 heads and mancini racing 1.6 rocker arms std block deck height
       
    • 5.7 hemi

      5.7 hemi FBBO Gold Member FBBO Gold Member

      Messages:
      10,223
      Likes Received:
      5802
      Joined:
      Dec 21, 2008
      Location:
      ca
      Local Time:
      2:40 AM
      So you are using stamped steel rockers on a head that requires adjustable rockers?
       
    • 2 fast z28

      2 fast z28 Active Member

      Messages:
      31
      Likes Received:
      3
      Joined:
      Apr 16, 2013
      Location:
      wisconsin
      Local Time:
      2:40 AM
      no they are the mancini racing adjustable roller rocker arm setup
       
    • moobster

      moobster Well-Known Member

      Messages:
      123
      Likes Received:
      122
      Joined:
      Aug 15, 2018
      Location:
      Ontario, Canada
      Local Time:
      3:40 AM
      Using lash caps are like lowering the rocker arm shafts.
      Think of it like this, the shaft is stationary, and the rocker tip is raised the thickness of the lash cap, therefore changing the angle of the rocker, and the pushrod would become shorter. So the pattern will move closer to the intake side of the valve stem, with lash caps.
      Hope this helps.
       
      Last edited: Sep 25, 2018
    • Bicylindrico

      Bicylindrico Well-Known Member

      Messages:
      150
      Likes Received:
      95
      Joined:
      Aug 15, 2017
      Location:
      Sunbury Ohio
      Local Time:
      3:40 AM
      B3 Racing valve-train geometry kit. Check it out. Moved the rocker shaft up and in towards the intake. The kit also prevent me from having to clearance my heads for the 3/8 pushrods.
       
      • Agree Agree x 3
      • IQ52

        IQ52 Well-Known Member

        Messages:
        1,459
        Likes Received:
        1821
        Joined:
        Aug 2, 2011
        Location:
        Idaho
        Local Time:
        1:40 AM
        Oh so right. Go here and read the information on rocker arm location.

        http://www.b3racingengines.com/techpages/MoparRockerArmGeometry4.asp

        Then, if you want to do it correctly, contact Mike (B3RE) and have him build you a set of his locators.
         
        • Like Like x 2
        • Mike67

          Mike67 FBBO Gold Member FBBO Gold Member

          My Photo Garage
          Messages:
          4,686
          Likes Received:
          7063
          Joined:
          Nov 23, 2014
          Location:
          Woodlands Tx
          Local Time:
          2:40 AM
          Or you can just give up and send me the heads...I'll recluctanly ship you some rebuilt stockers to save you the aggravation....:D
           
          • Thanks! Thanks! x 1
          • threewood

            threewood FBBO Gold Member FBBO Gold Member

            Messages:
            3,341
            Likes Received:
            3479
            Joined:
            May 30, 2014
            Location:
            Yuma, AZ
            Local Time:
            12:40 AM
            I am a believer in the B3 Racing shims. I used them on my Stealth heads, Hughes rockers and the geometry looks perfect, tiny swipe pattern centered over the valve. We'll worth the money and peace of mind.
             
            • Agree Agree x 1
            • Mike67

              Mike67 FBBO Gold Member FBBO Gold Member

              My Photo Garage
              Messages:
              4,686
              Likes Received:
              7063
              Joined:
              Nov 23, 2014
              Location:
              Woodlands Tx
              Local Time:
              2:40 AM
              So I just read the article and looked at the examples of wrong geometry. I could be wrong but I thought the pics were to show the variances of the push rod angle up the ramp face starting off the base circle to max lift? The 1st 2 pics show a shaft sitting on the pedestals. ,pics 3&4 seem to have a huge shim under the shaft. HarlandSharp.jpg
              The reason I ask is for a better understanding of it all and appreciate your input. I have never seen a shaft shim that large before, also in a lot of the other pics it looked like the springs were binding on the backside. So are the bottom two pics supposed to be corrected?or am I seeing something else????
              Thanks
              Just read articles 2& 3 which explains what I was seeing..for the most part.:)
               
              Last edited: Sep 26, 2018
            • IQ52

              IQ52 Well-Known Member

              Messages:
              1,459
              Likes Received:
              1821
              Joined:
              Aug 2, 2011
              Location:
              Idaho
              Local Time:
              1:40 AM
              The bottom pictures show Mike's relocation shims that move a roller tipped rocker arm up and towards the intake ports. This relocates the roller tip to be over the valve with the smallest amount of swipe pattern across the valve tip.

              Moving the rocker as Mike does gives more clearance between the rocker body and the valve spring. Many people grind away on the rocker body to get valve spring clearance when the problem is the rocker arm is in the wrong place!

              Different heads and rocker arms will require different shim thicknesses and horizontal movement.

              I make the same type of shims for my own personal use only. However, Mike does a much better job of it.

              Pushrod angle I would correct with a ball/ball pushrod and cup stye rocker arm adjuster screw.
               
              Last edited: Sep 26, 2018
              • Thanks! Thanks! x 1
              • Bicylindrico

                Bicylindrico Well-Known Member

                Messages:
                150
                Likes Received:
                95
                Joined:
                Aug 15, 2017
                Location:
                Sunbury Ohio
                Local Time:
                3:40 AM
                I went from about .120" across the face of the valve stem to about .040" with Harland Sharp 1.5 rockers using the selected kit from Mike. He will have you take a few measurements and then will select for you which kit of his works best for your application. I just adjusted my valves for the first time and everything looked great.


                For what he charges and that you need to buy new push rods anyway, money well spent for sure

                IMG_9514.JPG
                 
              • 5.7 hemi

                5.7 hemi FBBO Gold Member FBBO Gold Member

                Messages:
                10,223
                Likes Received:
                5802
                Joined:
                Dec 21, 2008
                Location:
                ca
                Local Time:
                2:40 AM
                Does the B3 shim kit work for ductile iron rockers? So far I’ve only seen roller tipped rockers use this kit.
                 
              • 2 fast z28

                2 fast z28 Active Member

                Messages:
                31
                Likes Received:
                3
                Joined:
                Apr 16, 2013
                Location:
                wisconsin
                Local Time:
                2:40 AM
                So called Mike today at b3 racing what an awesome guy very helpful and good guy to talk to ,took the time to explain stuff when your not to sure, learned a lot from him will be ordering a kit very soon
                 
                • Like Like x 1