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reducing ’ping’ noise

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montanacur View Drop Down
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    Posted: 11 August 2005 at 3:21pm
Thanks a million for your help in my last topic.  This one is a little different, and I'm really needing help with it.  I've checked and read all over for certain things that supposedly remove the ping that comes from the CO2 tank due to how the internals are working, and nothing has worked.  I figured you folks here would have a pretty good idea what a person could do to get it taken care of.  On my gun the ping noise is just loud as can be unfortunately.  My gun is quiet, super quiet, but the ping sounds like a rocket going off by my ear.  I've never heard another 98C with this problem.  I thought it may be my tank, but it's not, as I have tried other tanks with the same problem arising each time.  Again, any help would be absolutely fantastic.  Oh, some specs on my gun:

98C with polished internals, J&J 14" barrel, rocket cock II and some other aesthetic stuff. 
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Monk View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Monk Quote  Post ReplyReply Direct Link To This Post Posted: 11 August 2005 at 3:24pm
Put some shrink wrap on your sear spring. Thats hould help some.
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montanacur View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote montanacur Quote  Post ReplyReply Direct Link To This Post Posted: 11 August 2005 at 7:49pm
Shrink wrap, as in plastic shrink wrap?  Or shrink tubing?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tigman250 Quote  Post ReplyReply Direct Link To This Post Posted: 11 August 2005 at 8:25pm
tubing, it's used for electrical connections. find it at any hdwr store
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Post Options Post Options   Thanks (0) Thanks(0)   Quote montanacur Quote  Post ReplyReply Direct Link To This Post Posted: 11 August 2005 at 8:58pm
I'll give it a try.  I tend to believe that the noise is coming from the valve or something related to it's function.  Maybe I'll take the tank off the gun and fire it a few times while hooked up, just without the asa screwed into the gun itself to test out my theory.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Monk Quote  Post ReplyReply Direct Link To This Post Posted: 11 August 2005 at 9:00pm
I wonder if putting some more Orings as an extra buffer for the bolt would do anything.

Or what about some rubber grommets on the asa bolts to give some extra vibration dampening?

Just throwing some stuff out there.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote montanacur Quote  Post ReplyReply Direct Link To This Post Posted: 11 August 2005 at 11:54pm
I tried the o-rings on the asa bolts trick.  Unfortunately it didn't work.  I think it made it louder to be honest.  I put them between the asa and the grip.  I heard someone say to try putting them under the heads of the bolts so that they were just hitting the asa.  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote montanacur Quote  Post ReplyReply Direct Link To This Post Posted: 11 August 2005 at 11:57pm
Oh, and I placed a silicone 'foot' that you would use under your computer monitor, or under furniture to keep it from scratching, on the front of the rear bolt to deaden the impact sound from hitting the valve, so that might be construed as more o-rings.

Has anyone else had this problem?  It seems kind of strange.

I should mention that I have done these things in order to try and get rid of the ping, so none of them are what is causing it.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mehs Quote  Post ReplyReply Direct Link To This Post Posted: 12 August 2005 at 2:06am
It's the sear spring, you CAN replace it with orthodontic rubber bands (really small rubber bands) that is supposed to make your trigger pull lighter too, but I wouldn't reccomend it, because it tends to uncock if you don't use strong enough rubber bands. 

But I just wouldn't bother silencing it in the first place, it's not like anyone would be able to hear it, except you.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote montanacur Quote  Post ReplyReply Direct Link To This Post Posted: 12 August 2005 at 2:28am
Actually, unfortunately it's loud enough to be heard from a ways away. :( But I will try putting the heat shrink tubing over it tomorrow and see how it goes.  Thanks!  It's just frustrating that it is so loud. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tigman250 Quote  Post ReplyReply Direct Link To This Post Posted: 12 August 2005 at 6:21am
it's the spring, the heat shrink will help alot. another thing that helps is to put on a rocket cock it covers the cocking hole and muffles the noise the spring makes. when i did the front cocking mod and welded the hole shut i was suprised how much quieter the "ping" was.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote merc Quote  Post ReplyReply Direct Link To This Post Posted: 12 August 2005 at 4:49pm
its not the spring making the noise its the co2 tank... i had the same problem but fixed it...



just run HPA
saving the world, one warship at a time.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote montanacur Quote  Post ReplyReply Direct Link To This Post Posted: 12 August 2005 at 8:11pm
**it's the spring, the heat shrink will help alot. another thing that helps is to put on a rocket cock it covers the cocking hole and muffles the noise the spring makes. when i did the front cocking mod and welded the hole shut i was suprised how much quieter the "ping" was.


 
I have a rocket cock II on my marker.  I'll get some of the tubing tonight and try it out.  It is the sear spring you're suppose to put it on correct?  Thanks again for all of your help everyone, it's much much appreciated. 

As for HPA, ;)  wife would kill me for spending that much money on my marker, although I wouldn't mind it.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote montanacur Quote  Post ReplyReply Direct Link To This Post Posted: 12 August 2005 at 10:11pm
I have a stupid question. I got the heat shrink, but how do you put it on?  Just a small piece over the unextended spring, or extend the spring to about the size it will be as it sits in the marker, and then put a piece of heat shrink over that the spring when it is extended?

Thanks!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rossy11223 Quote  Post ReplyReply Direct Link To This Post Posted: 13 August 2005 at 12:00am
A small piece when it is unextended, about 1/2 an inch should do.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote montanacur Quote  Post ReplyReply Direct Link To This Post Posted: 13 August 2005 at 12:34am
Another stupid question (thank you for bearing with me), but the spring itself is only about half and inch long.  So, because I am horrible about picturing things in my mind, do I cut it down to the size of the actual unextended spring, and then heat it onto the spring?

Edit:  Ok, I believe that I answered my own question not long after I asked it.  I took my receivers apart and was just messing around with the different internals, putting them threw the same motions that they would go through during actual firing.  I found that when the sear went back into place as the bolt was cocked, it made a 'click' noise as it was held in place by the rear bolt 'catch', for lack of a better word.  This click noise was accompanied by a 'ping' in the sear spring, as has been mentioned before as the problem for the ping noise during firing.

I decided to try different ways of applying the heat shrink tubing.  I first just put it on the spring with the spring compressed and in an idle state, with just enough tubing to cover the spring, and heated it on.   I then repeated the test of manually moving the bolt back and listened for the pinging noise from the spring.  It was still there, although I noticed that if I placed the slightest pressure on the spring with my fingertip, it went away.  So I removed the tubing, and measured it out to go on while the spring was in position in the marker, which meant a larger piece of tubing to cover the extended spring. 

From there I placed the spring with tubing in place, and carefully turning my marker over, I heated the tubing to shrink it.  Then I repeated the manual firing test, and there was no ping noise to be heard when I cocked the bolt.  So in effect, any noise from the sear spring, is now gone and dampened down to minimal (I couldn't hear it at all).  I haven't been able to test the marker out gassed up as it's midnight, but as soon as I do, I will leave a report here of how it sounded in the morning.  I am leaving all of this info in case someone else wants to figure out how to do it, and can find it by searching. 

Thanks again for your help folks, it's much appreciated. 


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Post Options Post Options   Thanks (0) Thanks(0)   Quote montanacur Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2005 at 1:27am
After testing this through paintballing all day, I am very happy with the results.  I found that keeping my fps down to 275, or even a little lower was optimal.  However, it did still make a little noise.  But it is a tippmann, and as they like to make noise, I couldn't complain.  Over all I am satisfied with the results I got.  Hope this helps someone.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Enos Shenk Quote  Post ReplyReply Direct Link To This Post Posted: 15 August 2005 at 1:58am
Originally posted by merc merc wrote:

its not the spring making the noise its the co2 tank... i had the same problem but fixed it...



just run HPA


It IS the spring. But a co2 tank will reverberate more, and make the ping louder.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rossy11223 Quote  Post ReplyReply Direct Link To This Post Posted: 15 August 2005 at 12:15pm
I don't think you are supposed to heat it on.....it just rests on the spring.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Monk Quote  Post ReplyReply Direct Link To This Post Posted: 15 August 2005 at 2:41pm
I still think some grommets on the asa bolts or a rubber gasket between the asa and grip, will take alot more ping out of the marker.
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