Become an AGN forum member to be included in our multi-thousand dollar Monthly Airgun Giveaways! Winning is as easy as picking a number, no strings attached! This is our way of thanking you for being a part of the worlds biggest airgun forum. Yours truly, Michael Wendt - Owner.
Join HERE

1322 power mod question

  • Views : 1065
  • Link

    Raden1942
    Participant
    Member
    United States
    Accuracy: +22

    Hey guys just wondering if anyone has used the alliance hobby flat man kit with the boss valve, spring, transfer port and piston with no barrel length increase. I am using this as a bikepacking airgun and need to save wieght. If you have a longer barrel id be interested in your chrony numbers too. 

     

    Link

    ranedouglas
    Participant
    Member
    Accuracy: +13

    .    i've recently modded two brand new 1322's.   the black one – disco steel breech . and flat top piston, flat top valve, 2289 barrel band, and extended bolt probe all from charles mellon airguns.   the brown one – i used all stock parts and only extended the bolt probe.  both have the ice maker freezer line transfer ports and both have 14.5" barrels.  i drilled out the 1322 barrel band for longer barrel , as i needed open sights on this brown one.  i inserted washers inside the pump linkage where it pins in thru the gun – makes it more sturdy and used felt pads to cushion where the pump arm closes onto gun.  —  guess what ?  —  a member here shared with me that he thought a larger, well sealed transfer port was paramount, as he was getting near 600 fps from doing this with extra orings and bic lighter orings from his black one with stock 10" barrel and 10 pumps (seems he had steel breech also)….i was amazed at that.  both of my projects get 580 fps on 13 pumps (all velocities using 14.3 grain premiers).  i am chasing 618 fps ( 12ftlbs ) .  i plan to go in and cut a few threads from the valve and widen the valve and barrel transfer holes a bit more on one of these 1322's to see what happens…..   i know this sounds crazy (and i'm not suicidal) , but tested both by the putting the muzzles in my mouth and assuring that no air leaked as i blew threw as hard as i could.  it was more challenging to do this with the stock plastic breech, but it can be done.  i know some wadcutter will give me a red ball for explaining that 'oral breech seal test' , but i didnt know what else to do at the time – and – if it helps you my taking the time to write about this is good for me.  ( i've come to admire my crimson bowling bawls as the red spot on jupiter – it's outta this world. )   – rane on.   https://mellonair.myfreesites.net/       – sheridan pistol in pix for reference (and to show off). .                     …………….                                       …………………..                              …………………………. ………….        

    Link

    fishinwrench
    Participant
    Member
    Accuracy: +12

    Rane, that air leak test is brilliant, I never thought of that.  And I like the idea of washers at the pivot pin.  Good stuff !

    But yes the sealing of the transfer port, and the sealing of the bolt probe are the two biggest improvements one can make to these guns I think. 

    Link

    Raden1942
    Participant
    Member
    United States
    Accuracy: +22

    Dude I use that technique to check vacuum lines all the time. I wouldn't tell my kid thats ok to do but I will do the exact same trick to check mine….  Behind closed doors so my family doesn't finnaly lock me up in the loony bin for my airgun addiction  

    Link

    MileHighAirGunner
    Participant
    Member
    United States
    Accuracy: +12

    Umm… couldn’t you just use an inflated balloon over the end of the barrel to check you’re breech seal? Or maybe better yet, if you have an air compressor, use the airgun nozzle with a rubber tip that comes in most accessory kits. Just insert the rubber tip into the end of the barrel and give it a little juice. 

     

     

    Link

    ranedouglas
    Participant
    Member
    Accuracy: +13

    …I KNOW…RIGHT ??  but at the time (3 am) in my apt and it would have been too noisy to even hear a leak…balloon not enough pressure….it's still weird , now that i think about it – and i wrote about it – and it's still bent…..  maybe i could give myself a blue ball – for at least having good , heterosexual intentions upon blowing barrels ?  yeah ?   maybe ?  ..hell no , that's just making it worse. 

    Link

    fishinwrench
    Participant
    Member
    Accuracy: +12

    Compressed air was directed into the precise spot you desired …….. Let's not haggle over how it got there.   

    🤣

    Link

    MileHighAirGunner
    Participant
    Member
    United States
    Accuracy: +12

    3am and messing around with airguns!? Yeah that’s a little too hard core for me. I need my sleep. Which is very much in short supply these days with a one month old daughter and a not quite two year old daughter 😟. I had an itch to mod a 1322 and 2400KT also but… did I mention two daughters? Anyways, I wasn’t sure if a ballon would actually work. Just a thought I had. 

    Link

    ranedouglas
    Participant
    Member
    Accuracy: +13

    …man , i quit trying to be on an 8-5 schedule LONG AGO…..   i'm not your average white boy – body clock and persona are hard-wired to watch the night.   ….it is what it is….  my dad had the same hours..   — meanwhile . back at the 1322 ranch —-   does anyone remember the 'can't leak' port seals ?  back around 2010 , a fella was selling them on the classys – 5 port seals for $5……   they were awesome !   it was brass or copper tubing inside a rubber sheath – about the same inside and outside diameter as the plastic ice maker freezer line.  i still have one but re-using them makes them crimp up too much .       we never could figure out what this material (or part) was really made for , and we couldnt figure out how one could cut them so perfectly if it was from some type of line.  the one on the left is the freezer line , the middle is the 'cant leak' port seal , the one on the right is the stock crosman port seal.  when new, the middle one has the color of the freezer line one the outside and metallic gold inside.  the softness of the outer rubber sheath is little softer than the crosman black rubber stock seal.  these ' cant leak ' port seals increased velocity in my discos dramatically.                                                   …………………….                  ……………………                 …       …   

    Link

    ranedouglas
    Participant
    Member
    Accuracy: +13

    hey , fishinwrench , i cant find that data list (chrono numbers) you posted when you helped me with my 1322's.   could you post that table and those pix here again for me and raden ?  ,,,that black one you explained mustve came out pretty good. 

    Link

    fishinwrench
    Participant
    Member
    Accuracy: +12

    Sure no prob.  This is with 10 pumps ….

    It is standard length barrel, stock valve & piston, stock transfer port but I did drill it out just a tiny bit.   Used O-rings from a disposable cigarette lighter to seal the TP, and used O-rings (2) from a Evinrude outboard carburetor kit to seal the bolt/plunger.   

    I dumped talcum powder all over mine….and fired it to find the leaks.  Your method is WAY smarter. 😁

    Here's the velocity with 15 pumps (but I normally only use 12 pumps max since my gain between 12 and 15 pumps is only about 8fps.).

    Link

    ranedouglas
    Participant
    Member
    Accuracy: +13

    …talcum powder…..ive heard of shaving cream and toilet paper – we used a little dawn dish soap and water to find leaks on the handpumps at sun optics when i refurbed those benji / air force pumps….   that's not a bad idea , fishin wrench !    i just rebuilt a 1322 medalist that looks like an older american classic.  it's pretty well-made !  but i must've just lucked out getting a complete seal on the new 1322 using plastic breech.  the older ones are not as friendly and i had to cheat a bit with some glue…..  here it is 3 am again….   it's just too unorthodox for people to fathom , but when i had my own shop in the backyard out in the country – it was heaven on earth for me. no closeby neighbors, and internet radio via surround sound.   i'd just be getting into the groove around midnight – tuning hatsans and webleys…..   back in the day.    thanks for those data charts , man..  my numbers are very close to what you got there – even with the flat top stuff.  – valhalla red balla .  ( did you see my picture ? )    

Viewing 12 posts - 1 through 12 (of 12 total)

You must be logged in to reply to this topic.