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PostPosted: Thu Mar 09, 2017 11:34 pm 
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Posts: 199
Location: HRM N.S.
Hey guys,
I don't post as much as I would like but that be life.
This is in response to many past queries on here in regards to silencing that annoying clacking noise when pumping up the 2289 and similar. I have been meaning to post this for awhile .
I did this mod to a recent build and it dampened the sound very nicely, so I thought I would share.
I did this build as a gift for my son. It has all the important internal & external mods and a few extras. Thanks to rsterne, this project was an enjoyable breeze.
I don't have the numbers in front of me but roughly:
3 pumps = 460FPSish
6 pumps = 480FPSish + 2shot of 400ish
10 pumps worked out to 480FPS, second shot 450FPS, third shot 400 FPS.
Or something like that, PM me if for exact figures or refer to rsterne posts on this topic as my results mirrored his.
Anyhow back to that annoying "CLACK".
I made a dampener out of "high density compression rubber". We use this at my work place for product protection. In particular it is laid out on the floor of Intermodal Containers loaded with rolls of Newsprint (these weigh 2500-5000lb each and stacked so...) destined for overseas markets.
I cut a strip and doubled it up, then carefully pushed it into the channel (you know the one) in the underside of the pump arm using "dental pics" or whatever, leaving just a little bit sticking out. I got lucky and measured and cut right the first time.
Results were very nice, nearly silent.
So combined with the internal mods (as provided by rsterne) and this mod. The 2289 has become a real pleasure to shoot. Less pumping and nearly silent, what a joy to shoot.
Well got another 2289 (and another in the wings) to mod, a rework and 2 rebuilds lined up, so busy busy.
BTW: the front sight on this one is... yes you guessed it a spark plug tip.
Let your imagination run wild. LOL
I can supply you with the compression rubber for free if need be, just pm me and pay mailing cost. Probably $2.00 letter mail??? I will sent you enough for 2 or 3 mods or as much as will fit in an envelope.
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Last edited by rangerll on Fri Mar 10, 2017 12:03 am, edited 3 times in total.

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PostPosted: Thu Mar 09, 2017 11:40 pm 
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Location: HRM N.S.
One more pic.
This... or use a similar product.
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PostPosted: Fri Mar 10, 2017 9:28 am 
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Posts: 199
Location: HRM N.S.
Update!!
My FPS numbers stated above are way off, damn my poor memory. I did that mod a couple of years ago. Sorry for any confusion.
I found my notes this morning, still some nice numbers.
So here are the actual numbers after mods and tuning.
Final number is based on a 3 shot average using Crosman HP 14.4gr @70deg.F
4 pumps=381.2fps
5 pumps=419.3fps
6 pumps=450.6fps
*Note: At this point the valve is starting to retain air for a second shot. I dumped the retained air in between shots so all further results are based on an empty valve before pumping.
7 pumps=470.9fps
8 pumps=489.4fps
Now it gets good, retaining enough air to get a respectable 2nd shot.
9 pumps=496.2fps + 2nd shot 317.8fps
10 pumps=497.2fps + 2nd 360.5fps
11 pumps=480.1fps + 2nd 418.0fps
12 pumps=468.2fps + 2nd 456.6fps
At this point valve is starting to again retain air for 3rd shot, however the risk of valve lock becomes an issue. Also 12 pumps seems to be the sweet spot for this build giving 2 consistent shots of approx. 460fps, nice!
Very happy with these results.

For comparison here are some approx. starting numbers for this gun.
Stock before mods, same conditions as above.
3 pumps=175fps
6 pumps=280fps
9 pumps=320fps
12 pumps=335fps
15 pumps=363fps
20 pumps=352fps
Pathetic!
A lot of work for very little reward.
"I'm all sweaty and my arms are tired" :lol: "too tired now to hold the gun up to shoot and can't see the target through the sweat running into my eyes" :lol:
Have a great weekend all.

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PostPosted: Fri Mar 10, 2017 9:39 am 
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Joined: Mon Aug 08, 2016 7:23 am
Posts: 2778
Location: Somewheres near the Atlantic
I got some tubing that slips over. I bought it when I bought my upgraded screws for my Maximus. Ive yet to try it out.


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PostPosted: Fri Mar 10, 2017 9:53 am 
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Location: HRM N.S.
leadslinger wrote:
I got some tubing that slips over. I bought it when I bought my upgraded screws for my Maximus. Ive yet to try it out.


That should do the trick nicely, or some aquarium airline tubing should squish in there and flex back to stay put once you get in there. I just used what I had on hand, I brought home several pieces of rubber to use as work mats they're great. Nice and thick and grippy.
This mod is well worth the effort and a good rainy afternoon project.

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PostPosted: Fri Mar 10, 2017 10:50 am 
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Location: Caronport, Saskatchewan
Great info, thanks for sharing all the numbers! So basically you changed/modified valve and piston to get power up then put in a lighter hammer spring (and hammer?) to bring power back under legal limit and now you get 2 shots for the price of 1! Good deal!

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PostPosted: Fri Mar 10, 2017 11:08 am 
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Location: HRM N.S.
wesb2007 wrote:
So basically you changed/modified valve and piston to get power up then put in a lighter hammer spring (and hammer?) to bring power back under legal limit and now you get 2 shots for the price of 1! Good deal!


Yes exactly. Simply swap to a lighter spring or clip the stock one and you are good to go.
Be mindful of over pumping and causing valve lock. You can find more info on this topic here on the forum, probably posted by rsterne. He can explain it much better than I can.

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PostPosted: Fri Mar 10, 2017 11:31 am 
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Location: Caronport, Saskatchewan
Thanks!

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PostPosted: Tue Apr 18, 2017 8:42 am 
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Posts: 712
Simply switching to a 2240 spring along with FTP and valve mod is supposed to run at 490fps..and go no higher.....will start my 2289 build as soon as I have all the parts in the mail.Harold


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PostPosted: Tue Apr 18, 2017 8:44 am 
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Joined: Mon Aug 08, 2016 7:23 am
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Location: Somewheres near the Atlantic
I might attempt to install that tubing I got for my click clack stop mod. Since its rather annoying.


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PostPosted: Wed Apr 19, 2017 12:08 am 
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Location: Caronport, Saskatchewan
Pioneer2 wrote:
Simply switching to a 2240 spring along with FTP and valve mod is supposed to run at 490fps..and go no higher.....will start my 2289 build as soon as I have all the parts in the mail.Harold

Good tip! I'll have to order one, or two lol!

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PostPosted: Wed Apr 19, 2017 12:09 am 
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Location: Caronport, Saskatchewan
Thanks again RangerII for the pieces of rubber you sent for sound dampening!

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PostPosted: Fri Apr 21, 2017 10:13 pm 
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Joined: Fri Feb 26, 2016 2:42 pm
Posts: 50
Good idea. Is this the same material those yoga mats are made of?


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