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Is mod really worth it?

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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home much % more?

Poll ended at Sat Oct 04, 2008 7:08 pm

10
0
No votes
20
1
20%
40
3
60%
50
0
No votes
60 or more
1
20%
 
Total votes : 5
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Is mod really worth it?

Unread postAuthor: Demon » Sat Sep 27, 2008 7:08 pm

I am going to build an spudgun with an 3/4" anti siphon sprinkler valve:

1.5 inch x 2 foot chamber

1.25 x 3 foot barrel

3/4 inch anti siphon sprinkler valve

If i mod it, how much % of the power will be increased?
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Unread postAuthor: Ragnarok » Sat Sep 27, 2008 7:16 pm

A reasonable 20% at least I'd say, and possibly more.
However, the real advantage of modding a sprinkler is the fact it's practically equal in cost and effort, but provides that power any way - you see, the stuff to mod it only costs about the same as the batteries and switches you'd need for basic operation.

The thing I have to call on is that anti siphon valves aren't usually a great move, IIRC.
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Unread postAuthor: Mr.Sandman » Sat Sep 27, 2008 7:17 pm

definately mod it s worth it but thats not a good c:b ratio so it wont be that powerful. maybe use a piston much better performence
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Unread postAuthor: Demon » Sat Sep 27, 2008 7:24 pm

thats not a good c:b ratio


why its not a good c:b ration Mr.Sandman?

The thing I have to call on is that anti siphon valves aren't usually a great move, IIRC.


What do you mean by that Mr.Ragnarok?
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Unread postAuthor: Ragnarok » Sat Sep 27, 2008 7:30 pm

Mr.Sandman wrote:but thats not a good c:b ratio.

What's the problem?
It's pretty near 1:1, which is a decent compromise between power and efficiency.
There's a reason for any C:B ratio.
Personally, I'd say anything over 2:1 was pretty wasteful, not adding much power, but slaughtering efficiency.
Less than 0.5:1, it's efficent, you can still extract power, but the cannon's barrel will tend to be very large for it's power.

Demon wrote:What do you mean by that Mr.Ragnarok?

I wouldn't know myself, but I'm told that anti siphon valves are less efficent than standard sprinkler valves.

But you'd need to talk to someone who knew sprinkler valves better than me.
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Unread postAuthor: Demon » Sun Sep 28, 2008 8:11 am

I wouldn't know myself, but I'm told that anti siphon valves are less efficent than standard sprinkler valves.


The only difference between the two is then anti siphon is having an elbow
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Unread postAuthor: Ragnarok » Sun Sep 28, 2008 8:27 am

Demon wrote:The only difference between the two is then anti siphon is having an elbow

Externally, yes, but I believe the internals are different and less efficent.

Like I said, I'm not the expert on sprinkler valves.
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Unread postAuthor: Demon » Sun Sep 28, 2008 8:31 am

The cap of the anti siphon mecanism(the elbow) could be unscrewed and we could take off the internal that may reduce the flow.
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Unread postAuthor: SEAKING9006 » Sun Sep 28, 2008 4:24 pm

.... which is likely the entire thing. Valves are usually only made up of two or three parts, man. And elbows reduce flow efficiency. Pretty badly at lower pressures, if I recall. Anyway, they just aren't as good as a straight inline.
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Unread postAuthor: clide » Sun Sep 28, 2008 6:18 pm

I would say mods are definitely worth it although the exact % increase in power will depend on your ammo.

Also if you ever get another sprinkler valve then you might as well get a 1". Usually they are about the same price or only a couple dollars more, but they give you almost twice the flow.
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