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Prosport And The Search For Power...

Discussion in 'Anything Airgun Related' started by EastmidsHD, Oct 18, 2019.

  1. EastmidsHD

    EastmidsHD Keep pullin' that trigger..

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    Further to my previous thread regarding the "help my delrin top hat is stuck", I decided to go the easier route as suggested by Nick @Tinbum and buy a new spring as opposed to faffing about and looking for a solution to get the bloody thing out.

    But first a back story. As I was keeping the lush PS I thought I'd treat it to a trigger polish and set up and sort out the metal guide and top hat for delrin. Turns out when I took out the OE parts the metal top hat was huge and there were 5 power washers fitted at AA. (see pic below)

    20191013_153932.jpg

    After test fitting the new guides and power washers, the gun was producing a massive 4.5ft/lb :facepalm: so yesterday a new spring was purchased.

    This is the Titan no 10 next to the standard AA unit..

    20191018_160110.jpg

    Obviously a difference, again I test fitted the new spring with a couple of delrin power washers and..... 13.3 ft/lb was produced, (hello officer :oops:).

    Again a strip down and removal of power washers, and back to some test shots, results... 12.5 ft/lb.

    At this point I will say that I initially used the £14 Chinese chono and the original low figures produced may have been wrong as I've not used the unit for months, but today I used my Shooting Chrony (green one) which has always been accurate and the above figures were the readings from it.

    Although I was assured by the salesman that I would not need to cut any coils from the Titan, it's looking like that's the route I'm going to have to go.

    My question is, will the spring settle from 12.5ft/lb or will I have to cut a coil or two off as I've read?

    Your thoughts would be appreciated :thumb:

    Ps... This has been a pain in the arse.
     
    2506sendero likes this.
  2. shauny

    shauny Top Poster

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    unless its dieselling,they seldom go down,but not unheard of. make sure your chrono readings are correct,
    then give it a couple of hundred shots to see where it settles,then will have a better idea how much to take off.
    spring. (before you crop the spring,you could half the tophat)
     
    Air arms boy and greyskull like this.
  3. squib

    squib Posting Addict

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    Assume you currently have the plastic top hat fitted?
    Would be interested to know which way it goes if you revert to the steel top hat. I’ll take a guess it may tame it a touch.
     
  4. EastmidsHD

    EastmidsHD Keep pullin' that trigger..

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    Guys....TOP HAT WILL NOT COME OUT...As mentioned in this thread and previous :facepalm::p
     
  5. shauny

    shauny Top Poster

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    oh,the tophat still stuck inside piston?
     
    EastmidsHD likes this.
  6. EastmidsHD

    EastmidsHD Keep pullin' that trigger..

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    yes but the top hat is just a regular size delrin and half the size of the original metal one.
     
  7. shauny

    shauny Top Poster

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    you need to get that out then :facepalm::)
     
    Gary Jones likes this.
  8. Tinbum

    Tinbum Delusions of adequacy

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    I told you that spring was gash!:D

    As said, shoot half a tin of pellets, test again and remove or crimp a coil as necessary.
     
    Seamaster and EastmidsHD like this.
  9. pjgtech

    pjgtech Bah Humbug.......

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    Was this a new or SH ProSport?
     
  10. EastmidsHD

    EastmidsHD Keep pullin' that trigger..

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    I bought it used but it was a genuine very low shot count
     
  11. Seamaster

    Seamaster Super Moderator Staff Member Mod/Admin

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    Listen to Nick mate. He’s got a bit of an idea about these things.
     
    EastmidsHD and Tinbum like this.
  12. Tyler durdon

    Tyler durdon Keyboard Hero

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    49C76D4E-D750-44EC-A1AC-C4CB48FB3CD1.jpeg I recently sent my spring off to shauny as my new prosport was producing 13 this is what I got back . Including 2 different size top hats so I can test .i can now decide if I want it at 10.5 up to 11.5 . Which is great to have the option .give him a pm pal great service .
     
    EastmidsHD and shauny like this.
  13. Nickg

    Nickg Busy Member

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    Scragg the No 10 the titan No 12 I use can lose up to 20 mm in length
     
  14. Tyler durdon

    Tyler durdon Keyboard Hero

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    Nick do you cut the no12 or is that after it’s been scragged?
     
  15. Nickg

    Nickg Busy Member

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    Scragg first then once you have the power set (ie spring length) the power is more likely to stay where you set it .
     
    shergar likes this.
  16. Patrick

    Patrick Donator

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    Correct me if i'm wrong but on the Prosport and TX does not the front of the piston unscrew if that's the case could you not tap the top hat out with a drift from that end. I thought i read and saw a picture somewhere,might have been one of Jim Tyler's articles where the front part of the piston unscrewed.
     
  17. Tyler durdon

    Tyler durdon Keyboard Hero

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    Do you use the 12 with your alloy piston ?
     
  18. timmytree

    timmytree Very Active

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    No, you're thinking of the compression tube.
     
  19. shauny

    shauny Top Poster

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    nope.the latch rod screws into the piston,and thats it.
     
  20. Patrick

    Patrick Donator

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    Ah i see chaps ,i knew one part unscrewed but could remember whether it was the front of the piston or compression tube.
     

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