EV2 Reg pressure.

Discussion in 'Air Arms' started by Big Dave, Dec 22, 2010.

  1. Big Dave

    Big Dave New Member

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    What pressure do you set your reg to?

    I hope to be able to test mine later this evening, to see what it was set to at the factory but I am curious to know if anyone uses a different setting from standard.

    TIA

    Dave
     
  2. JTK

    JTK New Member

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    I believe factory it is set to 100bar
     
  3. rich

    rich Active Member

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    Mine wasn't. It was more like 110.
     
  4. Big Dave

    Big Dave New Member

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    Thanks Gents.:)

    I can't test mine yet, the test rig wasn't finished when I got there this evening. Hopefully it'll be finished tomorrow but possibly not until after Christmas.:mad:
     
  5. berty177

    berty177 Judge Diva

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    Reg pressure

    When it comes to technical advice on guns, I am shite trust me.

    I know the Walther's run on 80-84 bar for their regs.

    I am not sure if it would be the same for the EV2 regs though.

    Rich would know if I am close to that figures wise???


    Berty
     
  6. Jon

    Jon Member

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    Looking around 113 to 117 bar same as RN10.
     
  7. Willbe

    Willbe I Like BIG Hats!

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    Jon you got the test rig design and specs or are able to build the machined parts as required?
     
  8. Big Dave

    Big Dave New Member

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    Test rig is done and my reg is set around 100bar.

    Time for a tweak.:)
     

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  9. villiers

    villiers Self appointed antipimp

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    I would say the 100 bar is to do with there AT set up and why the regs creep the ones i have seen have been set higher makes the gun go with more of a crack , and then they dont seen to creep ;).
     
  10. rich

    rich Active Member

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    The "latent AT" tactic sometimes employed is to set the reg pressure high then have to set the hammer spring pre-load high as well, as the valve has to open against this pressure. Then there is no scope for the owner getting more power by adding any further pre-load as it's close to its max already. Do this with the T/P wide open and the only power adjustment left to you is downwards.

    This can have an undesired side-effect; at the end of a charge and the gun starts coming down off the reg, i.e., cylinder pressure is below reg pressure, the firing valve has less resistance to opening and stays open longer, with the result that the familiar rise in velocity for a few shots can actually get you into naughty territory for a few shots. Eventually the cylinder pressure drops off enough to kill this effect.

    I don't think reg creep - if you mean the first shot after a period of not-in-use goes low - has anything to do with reg pressure. Of course the amount of creep would be related to the difference in pressures but the fact that there is any creep is due to a poor seal.
     
  11. Big Dave

    Big Dave New Member

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    I have upped it to about 115bar. I'm going to leave it overnight to see if I've caused a leak and hopefully do some testing tomorrow.

    Thanks chaps.:)
     
  12. Ratinator

    Ratinator 77.74

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    cylinder charge

    May be wrong but if you set your reg to 115bar does that mean you will only have 85 bar of usable pressure?
    Assuming you fill to 200 bar will this affect your shot count?
    As i said i'm probably wrong but i would have thought 100 bar was high enough.
     
  13. Conor

    Conor Never been banned from sales Staff Member

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    roughly 1 bar per shot, should be plenty of shots available.
     
  14. berty177

    berty177 Judge Diva

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    Shot count from an EV2

    Conor,

    That should be enough shots fair enough, I remember testing my EV2 when I got it and getting 125 good shots from her. I didnt carry on with the shots as 125 is enough for anyone.

    I cant remember how much was left in the cylinder after but I got a rough idea it was about 120 bar. That works out roughly 2/3 of a bar per shot.

    I would never have thought that the reg pressure would be set so high mind. Thought it would have been similar to the Walther reg setting????


    Berty
     
  15. Conor

    Conor Never been banned from sales Staff Member

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    Nice reg tester, looks slightly like the new replacement one I got made up for my Steyr.;)
     
  16. chrispro97

    chrispro97 New Member

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    its the same idea i use on my steyrs as well conor
     
  17. Jon

    Jon Member

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    They have never been able to get the power with that monstrous knock open valve, so high pressure.
    Same setup as a sponsored gun in 98.
     
  18. Willbe

    Willbe I Like BIG Hats!

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    Looking at your rig all well and good BUT be slightly wary of the accuracy of the gauge. That gauge is a 1" instrument. Looking at Wika's specs ( http://en-co.wika.de/upload/DS_IN0002_GB_1372.pdf ) no accuracy spec is given for that gauge, however the 1 1/2" and 2" gauges have an maximumum accuracy spec of 1.6%FSD therefore on a 300Bar gauge as used here there may be an inaccuracy of +/- 4.8Bar if not more. In normal circumstances i.e. filling guns this would not be an issue, but for reg checking maybe its worth considering using a larger, more accurate gauge, or one of a more restricted range e.g. a 0-160Bar gauge, so to minimise as much of possible gauge inaccuracy.
     
  19. Big Dave

    Big Dave New Member

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    The regulator only controls the pressure of the air used for each shot. I imagine there will be a slight loss in the number of shots per charge.

    With the reg set as it was, I couldn't get an 8.4 pellet faster than 760ish fps in the cold weather. So when my set up showed 100bar, I was fairly confident the reading was close, close enough to start experimenting.

    Other than shot count, what are the downsides to being a bit high on the set pressure?

    This is my first dabble into regs any info would be much appreciated.
     
  20. JTK

    JTK New Member

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    I recon, and this is a bit of theory, that the higher pressure will give you IMPROVED lock time.
     
    Last edited: Dec 24, 2010

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