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Kral Puncher Pro Mods Ready To Go.

Discussion in 'Technical' started by TrickyDicky, Nov 7, 2019.

  1. TrickyDicky

    TrickyDicky Life in the slow lane

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    Just spent the afternoon in the shed turning the spacers and locators for the new carbon shroud with incorporated mod as the bit of carbon tube turned up today...so will be testing for quietness,

    So far i have polished all the trigger sears and fitted a softer spring which has transformed the trigger, polished all the internal cocking mechanism ...and now all that remains is to fit the SSG and adjustable hammer that is being made by a very kind and helpful person here.
    If it all pans out it should feel and perform like a gun of more than twice the price.....and it might even get a nice new stock.;)

    [​IMG]
     
    talent, genesis, DrGunn and 3 others like this.
  2. 32:1

    32:1 Theoben user

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    Whats the barrel like Tricky



    Chris
     
  3. TrickyDicky

    TrickyDicky Life in the slow lane

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    Absolutely spot on...first thing i tested before going any further with it will do pellet on pellet at 35yds.
     
  4. Gary Jones

    Gary Jones Big Poster

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    Nice work tricky, if it works as good as it looks it will be great
     
    TrickyDicky likes this.
  5. PumpnGun

    PumpnGun Donator

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    Good work Tricky, that will be spot on :thumb:

    Ray
     
  6. Bozz

    Bozz Engaging Member

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  7. TrickyDicky

    TrickyDicky Life in the slow lane

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    Keep watching and i will update as i test the shroud damping...going to first test without SSG fitted as i always find they damp the sound anyway.

    As for the trigger i dont know as i have never looked at the Mastiff.

     
  8. TrickyDicky

    TrickyDicky Life in the slow lane

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    Just cut the tube down to the length i want and tried the baffles in the pic and its not that quiet...i did try it at the full length with just an end cap and it was considerably quieter...which is not surprising as a decent void will do that,
    At the moment i have the back of the tube non vented i dont know if that will make a difference or not but at the moment i dont really want to drill the tube just yet ...going to try a void in the first chamber and see if that helps.

    [​IMG]
     
    talent likes this.
  9. sharpsman

    sharpsman Keyboard Hero

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    Excellent post i look forward to any more, i will be getting one in .22 in the next couple of weeks.
     
  10. Bash

    Bash Active Member

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    Wow looking good, got a puncher breaker myself and thinking of ways of making it quite too, keep the good work up :thumb:
     
  11. TrickyDicky

    TrickyDicky Life in the slow lane

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    Well the silenced shroud worked reasonably well and even better with the SSG......however i cant get the power above 8ftlb even with a stronger spring i suspect that i would need to enlarge the transfer port which i am not keen on doing at present so bit of a bust on that front..but i'' keep trying.
     
  12. Bozz

    Bozz Engaging Member

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    Hi was the power ok before the work if not it sounds very similar to my webley mastiff, they make the airway's for higher power country's, so I think it is a bit of an oversight as they should set them for our laws really. All best Graham.
     
  13. TrickyDicky

    TrickyDicky Life in the slow lane

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    The bottle pressure has a marked effect on power i know unregulated guns have a curve but this was quite marked anyway on filling to 220bar the power was back up to before,
    But i am thinking that the transfer ports are restricted in size as nether hammer spring tension or striker travel made any difference ...i will try again with higher bottle pressure but i suspect that the results will be the same....just removed the power adjuster and measured the aperture and found it to be 4.2 mm so if the rest or the airways is the same i am starting to worry as that's quite big for an unregulated .177 they only open them up to 4.7 to 5mm in the US to get their idea of good power.
     
  14. sharpsman

    sharpsman Keyboard Hero

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    4.2 should be ample size transfer port for a sub 12ftlb gun, have you tried it say at about 120 bar for power as most unrreged guns tend to be low powered at the top ends of the fill pressure
     
  15. TrickyDicky

    TrickyDicky Life in the slow lane

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    First tested at 120bar that's where i found the power too low...it can be filled to 250bar that's why i only filled to 220bar.
     
  16. sharpsman

    sharpsman Keyboard Hero

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    trial and error will find its spot try some where inbetween at least you will have somewhere to work from, 250 bar is a lot of pressure for a sub 12ftlb hammer spring ect to work with.
     
  17. Bozz

    Bozz Engaging Member

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    Hi there that's one reason why I fitted a regulator to my Mastiff, I opened all air airway's up a bit which then set me on finding a softer spring for hammer,I also fitted The spring in the exhaust valve as supplied by lane regulator's it now runs really sweet. Good luck Graham.
     
  18. robs5230

    robs5230 леший

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    I'd say your appreciation of the TP size may be correct. 4.2mm in .177 sub12 unregged seems way too big.
    The BSA ultra SE in sub12 runs a 2.7mm TP as standard and only needs 3.5mm regged and that has a 12" barrel so not very air efficient at that.
    I'd try choking that TP down a little.
    Getting the TP, hammer and valve return spring better suited to sub12 should see an increase in shot count and a quieter shot
     
    TrickyDicky likes this.
  19. TrickyDicky

    TrickyDicky Life in the slow lane

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    Yes as you say the BSA I have done work on had a much smaller TP and even had to reduce the one on a Coyote...just cant see why they would use so big for the power adjuster...will have to check the rest of the system before going further,
    But if the power adjuster is moved the fps drops markedly...i am now wondering if its a case of pandering to the US market and making the whole air system to suite their normal requirements and then using softer/shorter hammer springs to keep within UK limits.
     
  20. robs5230

    robs5230 леший

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    They'll simply be made for higher power markets and be "made to do" for the lower UK sub12.
    The Leshiy is another example. The standard Edgun setup made for max power and the factory reg is set way too high for us. They can be turned down (and are) for the UK but run very inefficiently.
    The Huma sub12 reg kit includes weaker hammer and valve springs in the kit.
    The Zbroia offerings are similar and are bodged for uk.
    I reckon your standard setup will need some fair changes, but if you do get it right, it should be great.
    I'd certainly start with a smaller TP and possibly a weaker hammer spring maybe.
    Sounds like a tinkerers dream :D
     
    TrickyDicky likes this.

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