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The uses of porting

Printed From: Tippmann Paintball
Category: Paintball Equipment
Forum Name: Upgrades and Customizing
Forum Description: Trick it out!
URL: http://www.tippmannsports.com/forum/wwf77a/forum_posts.asp?TID=103233
Printed Date: 31 January 2026 at 1:14pm
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Topic: The uses of porting
Posted By: Blue Hopper
Subject: The uses of porting
Date Posted: 22 June 2004 at 1:45pm

 Ive been told alot of things about porting and if anyone understands about how they work and can help me out please leave a reply. Does porting in the barrel have any more puposes than to cut back on the sound when the gun fire, do they make you have to use more air, is it bad to have them halfway down the barrel like on the stock 98 barrels.

If any one can help thanks.




Replies:
Posted By: Paintball Panda
Date Posted: 22 June 2004 at 1:56pm

Porting also Help your internals if your Barrel was cloged.

Porting can also give Extra Accuracy Ex: Teardrop, it has that Special porting which gives it better accuracy.



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Posted By: Blue Hopper
Date Posted: 22 June 2004 at 5:37pm

Thanks, and what sort of Barrell would you suggest buying i dont realy care how loud it is though



Posted By: procarbinefreak
Date Posted: 22 June 2004 at 6:03pm
porting really has nothing to do with accuracy.  the spiral porting is a marketing gimmick and really just affects the amount of noise.  barrels with lots of porting will be quieter than a barrel with no porting.


Posted By: metal_monster87
Date Posted: 22 June 2004 at 7:33pm

spiral porting decreases turbulance in the barrel making it more accurate. also more porting results in less noise.



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Posted By: hashi2008
Date Posted: 22 June 2004 at 8:16pm
 Yeah, I heard that the ball sorta "floats" and the porting allows the air to escape reducing wobbling in the barrel.


Posted By: You Wont See Me
Date Posted: 22 June 2004 at 9:41pm
Spiral porting does NOTHING for accuracy.

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A-5
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DOP X-CORE 8 stage x-chamber
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Posted By: SnakeEyes
Date Posted: 22 June 2004 at 11:03pm
Originally posted by metal_monster87 metal_monster87 wrote:

spiral porting decreases turbulance in the barrel making it more accurate. also more porting results in less noise.



Thats funny, if you ever take a fluid dynamics class you will learn that turbulent air layers actually reduce air resistance on an object and allow it to travel straighter and faster. Same as how a fast ball has proper back spin to trip into the turbulent air region to allow it to travel faster than a curve ball or slider.

As for porting, it does several things. It allows excess air pressure to escape or enter the barrel. Blow back pressure can be alleviated with porting. The way air escapes also effects the sound propogation from the end of the barrel. Lastly porting helps clear broken paint residue from the barrel.

As for porting adding accuracy, thats just bs. Sideways spin on a paintball would do nothing more than cause it to hook or slice.

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Posted By: Stormy Knight
Date Posted: 25 June 2004 at 3:38am
Originally posted by metal_monster87 metal_monster87 wrote:

spiral porting decreases turbulance in the barrel making it more accurate. also more porting results in less noise.

If that was true, then all ported barrels would have spiral porting.

 



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Lightening Bolt
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Posted By: LordJovian
Date Posted: 25 June 2004 at 7:37am
The holes make it quieter, and make it look pretty. The "spiral" effect wouldn't make the ball spin, it'd make the air behind the ball spin. Much like the tip of an airplane wing- it causes the air to form a tornado-like effect and produce drag on the plane. Fortunately, there is no spiral effect, which would probably make the ball shoot horribly.

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Posted By: TheHoff
Date Posted: 25 June 2004 at 8:23am

Originally posted by LordJovian LordJovian wrote:

Fortunately, there is no spiral effect, which would probably make the ball shoot horribly.

If paintballs where more precise then there would be a demand for rifled barrels.  but they are too unpredictable to have a 1:12 twist or something similar.  Remember real guns use rifling and that puts a spin on the bullet.



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Posted By: killernoodle
Date Posted: 25 June 2004 at 8:58am
You dont need to put a spin on a paintball the same way you have to put a spin on a bullet.  Bullets are long and oddly shaped and would tumble in flight if not gyroscopically stabilized by rifling, reducing accuracy. Round shot, on the other hand, does not need the rifling as tumbling in flight for a paintball is less an aerodynamic problem than it is in a bullet.  In order to achieve any aerodynamic benefit from spinning the ball, it must be an extreme backspin and this can really only be achieved with a flatline.  Porting does nothing but silence.

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Posted By: TheHoff
Date Posted: 25 June 2004 at 10:51am
Hence I said REAL guns use rifling and you can't with a paintball because of inconsistancies among other things.

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Posted By: Blue Hopper
Date Posted: 25 June 2004 at 12:06pm

A round projectile such as a paintball somehow having the spin effect like on bullets i dought would decrease accuracy because this effect had been used even when we fired round projectiles in muskets and cannons. Though rifling in muskets did not come somewhere until late 1800's. 1880's i think. So if this effect was somehow put on a paintball it should increase accuracy. Though it would seem to me that the flatlines spin would still function better.



Posted By: hashi2008
Date Posted: 25 June 2004 at 12:23pm
 Think of it this way. A bullent is shaped like a football. A paintball is shaped like a baseball. How do you throw a football? With a spiral. How do you throw a baseball? With a backspin.



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