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HW100 Tuning

Discussion in 'Anything Airgun Related' started by Tatts, Mar 30, 2014.

  1. Tatts

    Tatts Posting Addict

    Likes Received:
    I bought the hw100kt fsb before Xmas and after testing it on a chronograph it was firing at 9.5ft lb. To save the hassle of Hull cartridge I decided to buy the anti tamper kit and spring kit from hw100tuning.co.uk.... After a week of nothing I emailed them with a swift reply and the items arrived the next day. After fitting them I now have various issues and they don't reply. Be nice if they sold items they had at least tested.

    Right now using 14.66 pellets all of my shots are 604 to 607 fps. This is too close for me but no matter which way I turn the adjuster the power doesn't change? (I've wound it all the way in until it doesn't cock and all the way out).

    The hammer spring is longer and as a result the magazine no longer slides in as the hammer itself fouls it. To load the magazine I have to pull the cocking lever further. It also makes the gun louder?

    I used to get 5 mags before refilling but now 2 mags from a 200bar fill and I'm into the yellow.

    How do I now resolve these issues? I hope I haven't just wasted £60 and ruined my gun......
  2. audiguypaul

    audiguypaul Donator

    Likes Received:
    If you have fitted a new hammer spring it sounds like its opening the valve for longer giving higher power and lower shot count, try fitting the original spring.
  3. Aussiethunder

    Aussiethunder Engaging Member

    Likes Received:
    March Cambs
    You can get a normal spring from chambers part no cs783.. I also tried their hammer spring, once fired it kept the valve opened and emptied my air cylinder. So i put the original back in. I do use their valve spring though, with a slight adjustment of the reg you can get more shots out of a fill. So what did you do with your anti tamper shuttle? You keen to part with it?
  4. Steve K

    Steve K Posting Addict

    Likes Received:
    West London/Bucks Border
    from what i've seen the springs are too long from hw100tuning, which will cause issues, i can't understand the need for after market components in these guns, i've removed the AT's from a few HW100's and they're all fully adjustable using all the original parts? ;)
  5. neiled

    neiled Donator

    Likes Received:
    I agree with SteveK as I removed the anti tamper as well and now I can alter the power accordingly very easily simply by adjusting the end screw either in or out.
  6. Whistler1

    Whistler1 Donator

    Likes Received:
    The Adjustable shuttle you bought,is still very usable,but as the guys above have said,put your original spring back in,or order a new one.I have owned one of the shuttles you have,and just removed the A/T on other hw100 as easily,and set the power.Sounds asif you have just blown some money on a spring thats no good for your gun.
  7. slugslug

    slugslug Member

    Likes Received:
    north cornwall
    fitted the softer springs in my 100............ reset the reg [you need to do this btw] bit of a fettle and its brilliant ! smoother than stock ! and 140 shots @11.4 AAfields 8.4g [compared to 90 odd before] in 177 too ;)........ very consistent, and quieter ......... I did modify the stock shuttle to be adjustable tho [didn't buy the 45 quid jobby] incase that's your issue ?

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