Steyr Regulator: A before and after

Discussion in 'Steyr' started by RobF, May 10, 2018.

  1. RobF

    RobF Administrator Staff Member

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    Up at Hmanphilly's last night. Just thought this might be of interest.

    This is a customer reg before being worked on. Creeping after firing, taking 30 seconds to settle after a shot. This isn't a bad example, some have taken 4 minutes to settle, some don't really settle for much longer periods of time.



    The same reg after being worked on, fast response back to the same pressure, no creep.

     
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  2. marojaz

    marojaz Active Member

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    Great illustration Rob. Can you say what was changed / work done to give that result?
    Mark
     
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  3. RobF

    RobF Administrator Staff Member

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    Can't really go into details because it's not my work, but it's a combination of modifying a couple of parts, and a bit of a feel for how it likes to work. It's repeatable though so in that respect it's not a fluke so to speak.

    Some of it is basic stuff like making cleaning up parts so they're optimal. Some of the work is pretty detailed though.

    Looking at applying the principles to other regs now.
     
  4. hmangphilly

    hmangphilly Not quite a full phil

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    Here you go Mark
    No secret .
    The seal has to seal.

    IMG_3053.JPG
    IMG_3056.JPG
    IMG_3055.JPG
     
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  5. RobF

    RobF Administrator Staff Member

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    54E9F8C2-655F-4644-BAF9-8DD2D7B7874D.jpeg

    Tried to get a good shot through a tiny magnifying glass and my iPhone.

    Think need to get the macro on it.
     
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  6. sstyle

    sstyle Member

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    Nice Work!
     
  7. marojaz

    marojaz Active Member

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    Nice one fella's - thanks for sharing. Looks like the 'treatment' also includes machining a smoother metal surface as well as the seal?
     
  8. Spray1Mark

    Spray1Mark Member

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    I presume the smoother surface is so that the contact area can mate fully and therefore seal?
     
  9. RobF

    RobF Administrator Staff Member

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    Yes. Tiny imperfections in the surface can allow air to bypass the seat. Same as bits of debris as well.
     
  10. blacklab

    blacklab Member

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    This is one I took a while back could not see but the damage with the naked eye but the samsung could
     

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  11. hmangphilly

    hmangphilly Not quite a full phil

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    Not really
    The metal just happened to be in the way so it got done too:)
     
    Last edited: May 10, 2018
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  12. Mr Blonde

    Mr Blonde HFT Sniper

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    Nice work lads...
     
  13. what barn door

    what barn door Active Member

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    Once it,s been re-faced, does it need to be shimmed?
     
  14. RobF

    RobF Administrator Staff Member

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    No. This reg had 3 shims in, 2 thin ones and one thicker. I don’t think phil takes off the amount of material any where near comparable to a thin shim.

    The only difference in set pressure is due to where phil set it, which he does deliberately to around 82 bar. I think it will quite happily run higher or lower pressure.
     
  15. ksts100

    ksts100 New Member

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    Impressive results after the tuning ..
    If i am remember my Steyr reg comes quickly in the designated bar .BUT, when i run/shoot the tester ( I use analog tester) goes down 2-3 bars easily.
    This reg,after the work, goes down only 0,1 bar and has fast response back to the same pressure ...Impressive !!!!
     
  16. hmangphilly

    hmangphilly Not quite a full phil

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    A few points of a bar variation are inevitable you can get much more variation than that just by breathing on The air reservoir
     
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  17. ksts100

    ksts100 New Member

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    Initially The purpose we are aiming at, is to correctly block the air over the piston head..If the plastic material over the piston has a mark ,maybe does not block immediately
     
    Last edited: May 11, 2018
  18. what barn door

    what barn door Active Member

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    Thanks Rob.
     
  19. hmangphilly

    hmangphilly Not quite a full phil

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    Rob's been running one of these regs for a good while now (all this winter at least ).

    His rifle started mucking about at the recent Gp.
    So we had a little look at it yesterday .

    Standard stuff

    Rusty hammer :eek:
    Slightly mucky channel
    Usual shagged probe o ring ;)
    Dirty and marked valve stem
    Checked valve spring free length .

    Any of which could be the culprit for poor shooting

    Rectified all those and changed the reg any way .

    Put the old reg on test and. Holding good pressure , returning well .

    Very impressed

    Here's the deal with steyr regs .
    We keep saying this ......
    Once they are set ---- leave them alone .

    Don't adjust .
    Don't fiddle .
    Don't tweak .

    Leave them alone .

    As soon as any thing is disturbed the whole set up procedure will need repeating .

    They will creep if disturbed .

    The reason is in Blacklabs picture

    Oh by the way .

    The gun seems to be shooting better now

    Apart from the cumulative effect of all the stuff listed above which was poor performance waiting to happen ...,

    A marked improvement came when Rob cleaned the barrel and changed pellets .
     
    Last edited: May 12, 2018
  20. dave croucher

    dave croucher ÃŒch bin ein Meister Man

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    So, to clarify, Rob had a mucky channel??
     

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