HELP! Sniper farts even after sweet spotting reg...

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  • Jay Lederman
    Newbie
    • Jul 2021
    • 7

    #1

    HELP! Sniper farts even after sweet spotting reg...

    I'm pretty fed up with it at this point. I have a 2k full body pump sniper that just keeps farting. I sweet spotted the reg and nothing has changed noise wise. Shoots great just sounds annoying as heck. Any suggestions on what could be causing the issue valve bounce? How can I fix it without replacing every spring?
  • Myrkul
    2026 ICD Sponsored Team
    • Jul 2020
    • 905
    • Jaegers

    #2
    You could try a heavier hammer or a different valve. Honestly though, replacing the springs is going to be the correct solution. Might want to try the Nova valve out, since it comes with springs. It's got an amazing sound signature and is really quiet.

    Comment


    • Frmrspec
      Frmrspec commented
      Editing a comment
      Iโ€™ve had more farting with my nova valve than any other valve Iโ€™ve used.

    • Myrkul
      Myrkul commented
      Editing a comment
      @Frmrspec

      What hammer are you using? Mine has ZERO fart with the Nova valve spring, an Inception main spring, and a heavy Shocktech hammer.
  • Daltech
    Electro<Mech<Pump
    • Feb 2022
    • 872
    • West Coast

    #3
    Hold the pump handle forward some while firing? To be honest every pump Iโ€™ve ever heard farts.

    Comment

    • Alexndl
      MCB member
      • Jul 2020
      • 3508
      • Montreal, Qc, Canada

      #4
      Stock valve?
      ๐Ÿ’€Team Ragnastock๐Ÿ’€

      Comment

      • Jay Lederman
        Newbie
        • Jul 2021
        • 7

        #5
        Originally posted by Alexndl
        Stock valve?

        AutoCocker Low Pressure Valve Lower tube Kit - Complete from Autocockerparts dot com. Trash?

        โ€‹

        Comment


        • $L!mBo
          $L!mBo commented
          Editing a comment
          acp stuff is good. not trash
          you might have better luck with their standard kit. everybody thinks "low pressure" is so important but anything sub500psi is already low pressure.
          do you have a reg tester?

        • Kanto
          Kanto commented
          Editing a comment
          Spring for the ac parts gold kit. It is heavily 'inspired' by the CCM lower tubes. 325 PSI input pressure and CCM springs and it'll run fantastic with no farts. The stock springs also work just fine, the ccm is just a bit lighter pump stroke.
      • Jay Lederman
        Newbie
        • Jul 2021
        • 7

        #6
        Originally posted by Daltech
        Hold the pump handle forward some while firing? To be honest every pump Iโ€™ve ever heard farts.
        Yes, still the same annoying fart. This is not normal.

        Comment


        • Chappy
          Chappy commented
          Editing a comment
          Actually itโ€™s quite normal. Are you having some sort of performance issue besides the sound signature?
      • Hellion360
        Power Lurker
        • Jul 2020
        • 2451

        #7
        What is the farting noise? - This is the result of hammer bounce. Some valves open with lower force than others and will reopen letting little bits of air escape when the hammer bounces back.

        A heavier valve spring, shorter hard hammer spring, or lighter hammer spring can all help.

        I recall that ACP kit (shocktech clone) having a very light valve spring. So I would start with swapping that to a heavier one. That type of valve is not a common choice for sniper setups.
        Need Inception Designs or Shocktech Products? Let me know!

        MCB Feedback --------- MCB Consolidated WTB

        old PBN feedback

        Comment

        • Grendel
          MCB Member
          • Jul 2020
          • 1979
          • Lexington, SC

          #8
          Sweet spotting your regulator has really nothing to do with whether a sniper "farts" it has to do more with efficiency of the Reg output in relationship to the whole valve train [passages size/shape, number and angle of turns air makes, spring combo and valve efficiency. While "farting" may sound weird/annoying it is not necessarily an indication/symptom of a problem. The lower pressure [longer dwell] you shoot for in the setup the more likely you will hear different sounds from your setup not just "farting so Hellion360 question what is the noise. If it is actual valve bounce that does negatively affect your efficiency but really does not affect general performance and does sound bad. You can also hear spring ringing if you are sprung too light. Like Hellion360 mentioned up your valve spring rate to a stiffer spring then re-spring your hammer to match. Also watch your hammer weight. Most players swear by heavier hammer is always better but you can have farting from too heavy a hammer for your operating pressure and spring combination. Don't worry too much about sweet spotting while trying to get rid of your "farting" get your springs and hammer stable then re-sweet spot or don't sweet spot it really is not that important on a pump IMO sweet spotting only really affects efficiency and I don't worry about that on a pump too much, you just don't want to be too extreme on your reg. pressure either high or low. I tend to set mine anymore for somewhere around 350 psi and forget about it.
          Last edited by Grendel; 07-08-2024, 10:57 AM.


          "When you are asked if you can do a job, tell 'em, 'Certainly I can!' Then get busy and find out how to do it." - Theodore Roosevelt

          Feedback Link - https://www.mcarterbrown.com/forum/b...del-s-feedback

          Comment

          • Braws
            Pump
            • May 2024
            • 4
            • Texas

            #9
            Are you using a really short barrel?

            Sound signature is quite different between a 14" and 8" barrel. Shorter is louder.

            Just throwing that out there - likely not your issue though.

            Comment

            • Jay Lederman
              Newbie
              • Jul 2021
              • 7

              #10
              Originally posted by Braws
              Are you using a really short barrel?

              Sound signature is quite different between a 14" and 8" barrel. Shorter is louder.

              Just throwing that out there - likely not your issue though.
              standard 14'' freak xl

              Comment

              • RAZRBAKK
                Unburdened by genius.
                • Jul 2020
                • 1356
                • Calgary, Alberta

                #11
                Embrace the flatulence. Otherwise you'll spend more time springing than playing.
                Originally posted by Terry A. Davis
                God said 640x480 16 color was a covenant like circumcision.

                Comment

                • Jordan
                  I. Am. Canadian. ๐Ÿ‡จ๐Ÿ‡ฆ
                  • Jul 2020
                  • 3476
                  • Southern Ontario, Canada

                  #12
                  I also despise quacking pumps, but Razrbakk is correct in saying you'll spend more time playing with springs than playing paintball. Been there done that...
                  And God turned to Gabriel and said: โ€œI shall create a land called Canada of outstanding natural beauty, with majestic mountains soaring with eagles, sparkling lakes abundant with bass and trout, forests full of elk and moose, and rivers stocked with salmon. I shall make the land rich in oil so the inhabitants prosper and call them Canadians, and they shall be praised as the friendliest of all people.โ€

                  โ€œBut Lord,โ€ asked Gabriel, โ€œIs this not too generous to these Canadians?โ€

                  And God replied, โ€œJust wait and see the neighbors I shall inflict upon them."

                  Comment

                  • Jonnydread
                    Wild Card
                    • Jul 2020
                    • 4388
                    • Lil Rhody

                    #13
                    The least farty valve without having to go down the springing rabbit hole I've used is the PPS LT valve, but like others are saying it's not really worth the effort considering you'll barely notice the toots in game.
                    ๐Ÿ’€ PK x Ragnastock ๐Ÿ’€

                    Comment

                    • latches109
                      Always Sciencing
                      • Jul 2020
                      • 2111

                      #14
                      +1 Springs and hammer weight will relieve your flatulent woes.

                      Comment

                      • Jay Lederman
                        Newbie
                        • Jul 2021
                        • 7

                        #15
                        Originally posted by latches109
                        +1 Springs and hammer weight will relieve your flatulent woes.
                        lol thank you.

                        Comment

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