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  • rocker stud question

    I have read on a few other sites, that stock rocker arm studs must be machined flat on top for poly locks to fully engage or lock properly is this true? i plan on using p/n 12371058 But i really don't feel the need to grind down the tops of the studs unless it's completely necessary. Any input would be nice thanks
    95 T/A m6, cc503, harland sharp 1.6 rr, long tube pacesetters wrapped, 3" cutout, K&N, Moog suspension

  • #2
    When I rebuilt my LT1 I did not do anything special to the ARP 7/16th studs I used.
    - Brian Meissen
    Owner, MiFBody.com
    Administrator, LTxTech.com


    1994 Camaro LT1 Transplant - 357ci LT1, cammed, stalled, and driven.
    2022 Camaro LT1 - "Cherry Bomb 2"
    Michigan FBody Meet & Greet Car Show 2022
    June 4th, 2022 - 9am to 3pm!!!
    The HUB Stadium, Auburn Hills, MI

    Comment


    • #3
      I had a lot of questions i should of asked you that one day. Honestly i think if i didn't flatten the tops of the studs i would be safe. I just didn't know if there was any extra risk of the locks backing off if the studs weren't perfectly flat. I plan on going with scorpion 1.6 s/a rockers, they seem like a nice little set
      95 T/A m6, cc503, harland sharp 1.6 rr, long tube pacesetters wrapped, 3" cutout, K&N, Moog suspension

      Comment


      • #4
        Don't go SA - go NSA. With SA you're relying on little bumps on either side of where the valve stem rides to align the rockers -- I've seen too many SA rockers jump off the valve stem at higher RPMs and mess up people's motors. I'd rather have the insurance of NSA with the guideplates making sure everything is aligned.
        - Brian Meissen
        Owner, MiFBody.com
        Administrator, LTxTech.com


        1994 Camaro LT1 Transplant - 357ci LT1, cammed, stalled, and driven.
        2022 Camaro LT1 - "Cherry Bomb 2"
        Michigan FBody Meet & Greet Car Show 2022
        June 4th, 2022 - 9am to 3pm!!!
        The HUB Stadium, Auburn Hills, MI

        Comment


        • #5
          The deal breaker for me and using guide plates is that push rods have to be hardened and I know hardened push rods are pretty expensive. Otherwise I would but im on a tight budget
          Last edited by Bentley; August 10th, 2013, 08:12 PM.
          95 T/A m6, cc503, harland sharp 1.6 rr, long tube pacesetters wrapped, 3" cutout, K&N, Moog suspension

          Comment


          • #6
            The hardened pushrods I bought for my cc503 cam swap was $120, guideplates another $20. IMO worth it rather than getting an aggressive cam with SA rockers and then having to rebuild your engine when the rocker pops off the valve...
            - Brian Meissen
            Owner, MiFBody.com
            Administrator, LTxTech.com


            1994 Camaro LT1 Transplant - 357ci LT1, cammed, stalled, and driven.
            2022 Camaro LT1 - "Cherry Bomb 2"
            Michigan FBody Meet & Greet Car Show 2022
            June 4th, 2022 - 9am to 3pm!!!
            The HUB Stadium, Auburn Hills, MI

            Comment


            • #7
              True, and you're probably right I see many people running hardened push rods and guide plates with nsa rockers. It would be the way to go and a bit safer, im just on such a tight budget right now. Maybe I can get lucky and find someone on here with used equipment for sale. If not I think I can get away with running s/a's with the 503 I wouldn't go any bigger though
              95 T/A m6, cc503, harland sharp 1.6 rr, long tube pacesetters wrapped, 3" cutout, K&N, Moog suspension

              Comment


              • #8
                dont the heads have to be machined for plates?

                Comment


                • #9
                  Didn't have to machine mine?
                  - Brian Meissen
                  Owner, MiFBody.com
                  Administrator, LTxTech.com


                  1994 Camaro LT1 Transplant - 357ci LT1, cammed, stalled, and driven.
                  2022 Camaro LT1 - "Cherry Bomb 2"
                  Michigan FBody Meet & Greet Car Show 2022
                  June 4th, 2022 - 9am to 3pm!!!
                  The HUB Stadium, Auburn Hills, MI

                  Comment


                  • #10
                    I did a sbc and when we use the pushrods needed to get the swipe pattern right the rockers bottomed on the plates

                    Comment


                    • #11
                      SBC heads are different.
                      SBC heads usually have pressed in studs, so you have to machine them down and tap them to fit the screw in studs.
                      Some guideplates will require you to cut them and then weld them back together.

                      Scorpions I have seen some bad things from them, best bet is Comp Cams Pro Mags.
                      Originally posted by Yoshi94
                      Mines about an inch bigger than Kyles. I need to get one of those
                      Originally posted by ryanwarby01
                      Put it this way, if you have a money tree a LT1 is a wood chipper!
                      sigpic

                      Comment


                      • #12
                        Like Brian has said nsa is the way to go... even though you're on a budget, the absolute last place you want to skimp on is the valvetrain... as stated before comp pro mags and crane golds are both good rockers. maybe wait just a bit and get the cash to get the right valvetrain in your motor and you will thank yourself.

                        Comment


                        • #13
                          I will have to check summit out and see what comp and crane have. Im not in a real big rush i plan on doing it in a couple of months so i will go over all my options. I figured it would of been ok to use s/a rockers, they used them in the lt4, granted the hot cam is a bit smaller then the 503. I will keep an eye out and see what i can find out there i just started looking for rr
                          95 T/A m6, cc503, harland sharp 1.6 rr, long tube pacesetters wrapped, 3" cutout, K&N, Moog suspension

                          Comment


                          • #14
                            Upon further research, to run nsa rockers is not as expensive as i once thought. I know that stock push rod length is 7.20 but would 7.195 be ok to use? i was looking at comp 7808-16 rods they are 7.195. Im also wondering what the best fitting guide plates are?
                            Last edited by Bentley; August 12th, 2013, 06:37 PM.
                            95 T/A m6, cc503, harland sharp 1.6 rr, long tube pacesetters wrapped, 3" cutout, K&N, Moog suspension

                            Comment


                            • #15
                              You can get TFS Hardened push rods in 7.2" for 100 bucks.
                              Originally posted by Yoshi94
                              Mines about an inch bigger than Kyles. I need to get one of those
                              Originally posted by ryanwarby01
                              Put it this way, if you have a money tree a LT1 is a wood chipper!
                              sigpic

                              Comment

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