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Extreme Tuning - Diana 280

Discussion in 'Technical' started by MMZ, Jan 24, 2021.

  1. MMZ

    MMZ Member

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    I have performed an extreme level of tuning and also made a how to video. This covers following:

    1. Piston Sleeve - Using PTFE Teflon sheet
    2. Polish Spring Ends
    3. Use forward washers to make piston a bit heavier
    4. Resize Seal - both front and circumference
    5. Put in Muzzle Brake
    6. RWS SCope

    Results: The gun was shooting at an average of 10.35 ftlb; and after tuning it went to 12.48 ftlb. The Joule went upto 17.4 Joules. :up::loser:

    Here is the YouTube Link:

    Airgun Tuning - How to



    TC
     
    Last edited: Jan 24, 2021
  2. shauny

    shauny Top Poster

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    use a credit card to verify your age! fek off
     
    robs5230, Slipknot88, mutley and 2 others like this.
  3. Cammie1314

    Cammie1314 Doric spikkin teuchter

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    Yeah I just came up the Clyde on a banana boat yesterday!
     
  4. That hurts

    That hurts Barely Active

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    Interesting, but I wouldn't exactly call it 'extreme' tuning. Can I ask why you left the scope on while doing the work as you made things difficult for yourself and open to damaging it if something had slipped ?

    Another observation is the clip could do without the annoying lift 'muzac' !
     
    foxtrott and mutley like this.
  5. Mopane

    Mopane Engaging Member

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    Watched it fine, no verification required.
    Good video MMZ, cheers.
     
  6. mutley

    mutley Busy Member

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    that's going to be viral...
     
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  7. shauny

    shauny Top Poster

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    also , extreme tuning! lol:laff:
     
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  8. mutley

    mutley Busy Member

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    reminds me of bespoke tuning...
     
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  9. Aston_Shooter

    Aston_Shooter Posting Addict

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  10. That hurts

    That hurts Barely Active

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    Never knew there was a Bristol in Canada, but you live and learn ...

    BQC.jpg

    ;):D
     
  11. Aston_Shooter

    Aston_Shooter Posting Addict

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    Wonder if he's any good with custom stocks :confused:
     
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  12. MMZ

    MMZ Member

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    I was sure that it will not slip, else I would have taken scope off. I did not have off-round piston so did not do any rounding stuff or other things which might require other work e.g. polishing cylinder etc. I am please with 25% increase in performance and and fine nice thud and no vibrations at all. :hunting:
     
    SCW22 and foxtrott like this.
  13. MMZ

    MMZ Member

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    Nooooooooooooooooo... :D
     
  14. MMZ

    MMZ Member

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    Thank You.
     
  15. mutley

    mutley Busy Member

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    do you do extreme tuning on different brand rifles?
     
  16. shauny

    shauny Top Poster

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    not extreme,but a little better,new spring/guides, rear piston bearings.
     

    Attached Files:

    foxtrott likes this.
  17. MMZ

    MMZ Member

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    Yes I saw that before as well. Great work.

    I just used Teflon sleeve, no shaving piston head; it was not off. I had the bearings but did not put in, I read opinions and then decided not to use. Just polished the spring ends. For this gun shooting in excess of 12.5 ftlbs is great.
     
  18. shauny

    shauny Top Poster

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    good little guns. only drawback for me is the ball detent on the breech.
     
  19. MMZ

    MMZ Member

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    Any drawback of ball detent, I thought it was more wear resistant.
     
  20. shauny

    shauny Top Poster

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    a ball detent allows lateral movement, so zero gun,tap the barrel left or right
    before the shot,and more than likely poi will change.
    this will not happen withn a chisel detent
     
    Tony.T and MMZ like this.

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