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#1 chewiestmonkey

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Posted 17 December 2008 - 05:59 PM

does barrel porting help accuaracy?
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#2 cockerpunk

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Posted 17 December 2008 - 06:01 PM

thats what palmers claims.

idk, its defiantly one to test though.
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#3 A.E.D.paintballer

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Posted 17 December 2008 - 06:14 PM

it does reduce noise, my trracer is LOUD lol
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#4 brycelarson

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Posted 17 December 2008 - 06:57 PM

I asked Custom Products for a barrel w/o porting - but have not yet heard back. If we can get two barrels that are identical - except for porting the test is really easy.

Yes, porting does reduce noise - as far as I know - but accuracy - I've heard all kinds of claims - from spiral porting increasing range to reverse porting increasing accuracy and on and on - I've never seen any evidence to prove that porting does anything except make guns quieter.

#5 chewiestmonkey

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Posted 17 December 2008 - 07:51 PM

Yeah, thats the same thing i was thinkin bryce

i used to have a trillogy and it had a 12" non ported barrel, and that thing was just as accurate if not more so than my other guns with their fancy spiral ported barrels. (sp all american)
so idk!
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#6 Nicholai

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Posted 17 December 2008 - 08:12 PM

I remember a video by AGD discussing the crown tip and how it eased up the transition from the barrel to air. I remeber in the video he compared it to shooting a bullet into water and how it "kinks" when it hits the water. I wonder if the porting helps even out the pressure in front of and behind the ball to help it not wobble or kink after it leaves the barrel. Just something to think about.

Edited by Nicholai, 17 December 2008 - 08:12 PM.

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#7 brycelarson

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Posted 17 December 2008 - 08:46 PM

I remember a video by AGD discussing the crown tip and how it eased up the transition from the barrel to air. I remeber in the video he compared it to shooting a bullet into water and how it "kinks" when it hits the water. I wonder if the porting helps even out the pressure in front of and behind the ball to help it not wobble or kink after it leaves the barrel. Just something to think about.


That's certainly one of the claims that various manufacturers have used in the past - however, as I said, I have never seen any evidence that this is true. I'm not saying that it isn't - just that I haven't seen the data.

#8 Littleston101

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Posted 17 December 2008 - 08:56 PM

this would make a good one

#9 RealtorTommy

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Posted 17 December 2008 - 09:06 PM

I've been after this for a long time....I wish some of the older claims along as the newer claims that the companies are making about porting. porting design could be tested...

#10 brycelarson

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Posted 17 December 2008 - 09:47 PM

I've been after this for a long time....I wish some of the older claims along as the newer claims that the companies are making about porting. porting design could be tested...


they can - and that's what PunkWorks is all about :)

#11 Troy

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Posted 17 December 2008 - 11:07 PM

I've definitely heard the claim that porting reduces the amount of turbulence at the end of the barrel, and becomes more critical during high rates of fire (so the next ball isn't flying through turbulent air), but again, nothing more then marketing claims to back that up.
\m/

#12 killbot

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Posted 18 December 2008 - 02:51 PM

essentially it would help for barrel tip blowback to have porting on the tip, which can be seen with compensators on high power pistols, but on actual guns the blowback is much much higher therefor the effects of the compensator are much more dramatic, a paintball exerts such little force in terms of kick that the difference could be too minimal for your hands to notice, but essentially should still work the same on a micro scale. in terms of accuracy beyond that i dont know. I would also like to know how much the grooves in the tip on barrels like the phantom do as well as the porting.

#13 chewiestmonkey

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Posted 18 December 2008 - 03:00 PM

do they make phantom barrells in cocker thread?
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#14 Maj Tom

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Posted 18 December 2008 - 03:03 PM

do they make phantom barrells in cocker thread?

No

#15 cockerpunk

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Posted 18 December 2008 - 03:22 PM

do they make phantom barrells in cocker thread?


some of us wish and prey, but god never answers those prayers.
The ultimate truth in paintball is that the interaction between the gun and the player is far and away the largest factor in accuracy, consistency, and reliability.

And yes, Gordon is the sexiest manifestation of "to the front."


#16 Troy

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Posted 18 December 2008 - 04:05 PM

some of us wish and prey, but god never answers those prayers.


And prey? I can so see you slinking around the phantom birthing place trying to pounce upon a hapless mike grazing in his machine shop and demanding a cocker threaded barrel.
\m/

#17 cockerpunk

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Posted 18 December 2008 - 07:08 PM

some of us wish and prey, but god never answers those prayers.


And prey? I can so see you slinking around the phantom birthing place trying to pounce upon a hapless mike grazing in his machine shop and demanding a cocker threaded barrel.


thats cause im a good predator ...
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And yes, Gordon is the sexiest manifestation of "to the front."


#18 brycelarson

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Posted 18 December 2008 - 07:27 PM

thats cause im a good predator ...



maybe of the "to catch a" kind.....

#19 Troy

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Posted 18 December 2008 - 10:33 PM

maybe of the "to catch a" kind.....


Its the perv beard that gives him away.
\m/

#20 chewiestmonkey

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Posted 19 December 2008 - 12:37 AM

lol yeah...they should, whoever did would make a pretty penny i think
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#21 nickydp33

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Posted 19 December 2008 - 03:45 AM

looking forward to see what comes out of this
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#22 A.E.D.paintballer

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Posted 19 December 2008 - 04:33 PM

if i can find a ported traccer barrel locally i will do a decibel test then an acuraccy test
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#23 brycelarson

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Posted 19 December 2008 - 04:49 PM

if i can find a ported traccer barrel locally i will do a decibel test then an acuraccy test


here's the deal - simply testing a ported v a non-ported barrel won't guve us the answer we're trying to find. Take, for example, the two Trracer barrels I've owned. The stock one was aluminum. It was non-ported, 14" long and the bore was gigantic. The ported barrel I have was a TASO eliminator. It's a steel barrel, ported, much smaller bore and 12" long. Shooting those next to each other will tell you which barrel shoots better - but then determining what factor made that barrel shoot better is going to be very tough.

If you have two identical barrels - one ported and one non-ported - that's the rig we need to test this.

#24 A.E.D.paintballer

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Posted 19 December 2008 - 08:37 PM

machining porting?
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#25 brycelarson

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Posted 19 December 2008 - 09:10 PM

machining porting?


yes, this is something we talked about. taking a non-ported barrel and shooting it, adding porting, shooting more, repeat would certainly be a great test.

#26 A.E.D.paintballer

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Posted 19 December 2008 - 09:16 PM

ill see what i can do
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#27 BryanDragan

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Posted 22 December 2008 - 02:44 PM

very good test tbh only benefits i can think of porting is making it quieter..while non porting helps rain play.

#28 NeCaNeS

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Posted 22 December 2008 - 03:26 PM

What I have found it does not affect it that much and I have used rifled barrels and by what I have seen was that a rifled barrel will increase accuracy to some extent.

#29 rkremer

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Posted 23 December 2008 - 02:53 AM

It would seem that in order for porting to have a major effect, there needs to be a "good" paint to barrel match or "underbored" situation. Either that or have massive porting holes. The air pushing the paintball is going to take the path of least resistance. It's just like when a marker fires, the air pressure in front of the paintball is much less than the gas coming from the valve (atmosphere pressure is apprx. 14.7 psi, vs the operating pressure of your marker) and provided this pressure is enough to overcome the friction between the paintball and the barrel, the paintball will be pushed down the barrel. Likewise, in order for air to be vented by the porting, it must be easier for the gas pushing the paintball to go through the porting than keep pushing the paintball. So either it must be somewhat difficult to push the paintball (tight paint to barrel match) or there are huge porting holes that allow the gas to move freely through them.

As far as I understand it, the great potential of porting is that it can decrease the pressure difference between the front and the back of the paintball before it leaves the barrel. Presumably, if there's still a high pressure behind the ball when it leaves the barrel, the gas will rapidly expand behind/around the paintball. This expansion is likely to be turbulent, and turbulent flow is fairly unpredictable, aka inconsistent. So if there's a large pressure behind the paintball when it leaves the barrel, this turbulent expansion will not only vary from shot to shot, but it will be strong enough to affect the flight path of the paintball, which will decrease the accuracy of the marker. By decreasing this pressure difference at the end of the barrel with effective porting, the expansion will be less forceful and should affect the flight path of the the paintball less --> greater accuracy.

Edited by rkremer, 26 December 2008 - 01:20 PM.


#30 rkremer

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Posted 26 December 2008 - 01:40 PM

By the way, I have a ported, stock 11" trracer barrel

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#31 Epshot

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Posted 05 January 2009 - 02:57 PM

um.
how about just covering the porting?

sure it won't to be exactly like having no porting, but if the argument is that it allows to air to escape and keep from becoming turbulent ala Palmers argument(which i hope is correct since i coughed up an extra $45 for porting)
Then simply covering the porting with electrical tape(which will peel clean) should be enough for testing.

#32 brycelarson

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Posted 05 January 2009 - 03:54 PM

um.
how about just covering the porting?

sure it won't to be exactly like having no porting, but if the argument is that it allows to air to escape and keep from becoming turbulent ala Palmers argument(which i hope is correct since i coughed up an extra $45 for porting)
Then simply covering the porting with electrical tape(which will peel clean) should be enough for testing.



we've talked about this before - and the thing that would not change is the fact that the inner surface would then have essentially dents in it - which we don't know the effect of. It would be sorta like shooting an internally dimpled barrel.

#33 Epshot

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Posted 05 January 2009 - 06:59 PM

the problem with a dimpled ball is primarily the fact that after a ball exits the barrel it creates an unstable spin, which is why when you shoot them, they may go straight for 15ft then curve off radically in any given direction(at least thats been my experience with them.

I would find it hard to believe that at the end of the barrel they would have much affect.
Besides i'm just talking a quick test, its easy enough to order a 12 inch ported and non ported barrel from Palmer Pursuit shop.

If someone wants to donate a 12 non ported palmers i'll be more than happy to compare it to my ported barrel :D

#34 Troy

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Posted 05 January 2009 - 10:56 PM

We are over complicating things again. Who has a stock barrel without porting they wish to screw up, and a drill press? We aren't going for accuracy here, it doesn't matter too much if the ports are perfect. Drill your hole, sand down the barbs, then test.
\m/




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