Efficiency question

[dstud2000]

Ok, besides barrel to paint match, my question is on efficiency regarding valves. If you were building a light weight limited paint setup what would you use, a classic valve or retro/X valve for better efficiency out of a 13/3000 tank. My first assumption is lvl 7 bolt should be slightly more efficient than a lvl 10 bolt regardless of valve, if using lvl 10 the gold spring would be more efficient than the red. But other than that is there really
any efficiency differences between those valves? Thanks [emoji4]


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[Gundam V]

As far as I know, there really aren't any differences in the valves to make them less efficient than the other. A matched paint to bore will help with efficiency as would a slight under-bore. Using a lvl 7 bolt would also help with it, as for the lvl x. It doesn't really matter which spring you use, it will always be less efficient when compared to a lvl 7 bolt. As for differences in efficiency when using gold or red springs, that's a question for the forum mag gurus to answer.

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[dstud2000]

That is more or less what I was already thinking from what I have been reading on here. A lvl 7 classic valve is probably the best choice for what I want to do.


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[Gundam V]

Whether classic or retro, as long as your using lvl 7, it should achieve your desired result.

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[Sandman]

Level 7 bolt will be more efficient than level 10. Barrel length, bore and venting also contribute to the loss or gain of efficiency for sure.

[Tunaman]

Level 7 bolt will be more efficient than level 10. Barrel length, bore and venting also contribute to the loss or gain of efficiency for sure.

Yes. I believe TK tested all of that and came up with 11 inches is the best length

[Gundam V]

Yes. I believe TK tested all of that and came up with 11 inches is the best lengthI was under the impression that 8in was what was needed.

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[dstud2000]

The barrel is a 6” non ported DW Null barrel. Will be using an apex 2 on it.


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[athomas]

The level 7 bolt makes the valve more efficient compared to the level 10 bolt. If you do want to use the level 10 bolt, use the gold spring. It is more efficient than the red or grey spring.

[Nobody]

A 13ci tank? You won't get much out of it. If you want the best, put an adjustable reg on the tank and dial the i put pressure down to the minimu needed to shoot, should be south of 700psi. You will loose any RT effect, but you should gain some efficiency. Classic will be better than an Xvalve but both can benefit from this arrangement

[dstud2000]

A 13ci tank? You won't get much out of it. If you want the best, put an adjustable reg on the tank and dial the i put pressure down to the minimu needed to shoot, should be south of 700psi. You will loose any RT effect, but you should gain some efficiency. Classic will be better than an Xvalve but both can benefit from this arrangement

It’s a spring feed setup so if I can get 50 to 100 shots out of a 13 ci tank that will do.


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[Gundam V]

It’s a spring feed setup so if I can get 50 to 100 shots out of a 13 ci tank that will do.


Sent from my iPhone using TapatalkAt 13c.i. 3k psi you should get about 130 shots with lvl 7. Although that is by no means a guarantee but a rough estimate. If I recall correctly its 10 shots per c.i at 3k psi and 15 shots per c.i. at 4.5k psi. If memory serves those estimates were based on using a lvl 7 bolt. If I'm mistaken, I'm sure I'll be corrected.

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[dstud2000]

At 13c.i. 3k psi you should get about 130 shots with lvl 7. Although that is by no means a guarantee but a rough estimate. If I recall correctly its 10 shots per c.i at 3k psi and 15 shots per c.i. at 4.5k psi. If memory serves those estimates were based on using a lvl 7 bolt. If I'm mistaken, I'm sure I'll be corrected.

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Yes that is roughly the formula I was taking into account. 10/ci on 3000 but allowing for a lower count due to either paint, or the valve itself.


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[Nobody]

In that case, use the tightest bore possible wihout it being a stranglehold for the paint to shoot and use a barrel with minimum of porting. A 13ci tank would give you about 100 shots. Also, do not use a L10 kit. You need a higher worming pressure to move the bolt, and since you are trying to gain efficiency, you will loose the anti-chop.

Design is always a series of compromises