Valve Modification Efficiency Testing

[Smoothice]

A few weeks ago Loguzzzzzz cracked open my powertube on my sydarm valve. We then filled the dump chamber. Probably reducing the dump chamber by 50% or more. I then took it to the chrono range for some testing. All fps measurements were done on a big red chronograph.

Time between shots was only a few seconds. The amount of time for me to pull the trigger, read the chrono, write down the fps.

The weather was beautiful Probably in the 80's. Excellent 12 gram weather.

All 12 grams were weighed on a postal scale before use. I only used the ones that weighed the same. 43 grams full...

Paint used was pretty consistent size. It fit in the .682 insert just snug enough to not roll out and could be blown out with minimal effort. I would have made sure each ball was exactly the same size but I wanted to actually get some play time in.

Before testing I chrono'ed the marker to shoot about 280 fps. There were no velocity adjustments made after that.

Highlighted results are what I consider the last usable in play shot.

Here are my results v v v v




The only test I wish I would have done would be to see how the efficiency would have changed by using a stock valve with a longer barrel.

Questions or comments please post up.

Any if anyone needs their valve opened up and the volume reduced please contact loguzzzzzz.

He is able to do both spot welded valves and full lasered valves. He did my minimag valve and sydarm valve (both full laser welded) and they came out great. You can't even tell he did anything

[Smoothice]

Next time out I will conduct another test to compare a stock valve with short barrel vs a stock valve with a longer barrel. This is the only factor that would really be helpful...

[smilestyler]

Did you use the valve after the mod? What happened to the 5th shot after a string?

[Smoothice]

Did you use the valve after the mod? What happened to the 5th shot after a string?

Yes, test 2,3,4 were all done after the valve was modded. Then I played the rest of the day with it that way also.

Huh? After the 5th shot of a string was the 6th shot. Then the 7th,...

I don't think i understand your question

[BigEvil]

Im guessing there was no rapid fire testing.

[Smoothice]

Im guessing there was no rapid fire testing.

Nope. But during normal play I had to do a few rapid fires. Didn't notice much shootdown or freezing. But again I only have 8 shots...

[jolt00]

how did loguzzzzzz "crack it open" and devolumize it?

[Smoothice]

how did loguzzzzzz "crack it open" and devolumize it?

trade secrets is my guess

Maybe he'll post up details. But i'll leave that up to him.

[smilestyler]

Yes, test 2,3,4 were all done after the valve was modded. Then I played the rest of the day with it that way also.

Huh? After the 5th shot of a string was the 6th shot. Then the 7th,...

I don't think i understand your question

Sorry, I meant rapid firing

[MANN]

how did loguzzzzzz "crack it open" and devolumize it?

you can cut the weld on some older automag valves (they are just spot welded). Then heat them up, and they open up easily.

I would think that someone with minimal machine skills could cut the full weld off the newer valves. I would dare to guess that they are threaded too.

[Smoothice]

Sorry, I meant rapid firing

No real rapid firing tests besides on the field. And "I didn't notice anything" isn't to scientific.

If I fired a fast string over a red field chrono what would happen? Would it read all the shots? Maybe if I video taped it I could see fps.

Or would it just show the last shot fired? At least that would tell me if there was drop off on the last shot.

It would be easy just to load up 5-6 shots in the sydarm and read the last shot on the chrono.

[jolt00]

you can cut the weld on some older automag valves (they are just spot welded). Then heat them up, and they open up easily.

I would think that someone with minimal machine skills could cut the full weld off the newer valves. I would dare to guess that they are threaded too.

[Loguzzzzzz]

you can cut the weld on some older automag valves (they are just spot welded). Then heat them up, and they open up easily.

I would think that someone with minimal machine skills could cut the full weld off the newer valves. I would dare to guess that they are threaded too.

/\ /\ /\ /\ /\ /\. . . . .This was already answered in the very first post. . . . .\/ \/ \/ \/ \/ \/

He is able to do both spot welded valves and full lasered valves. He did my minimag valve and sydarm valve (both full laser welded) and they came out great. You can't even tell he did anything

[jolt00]

so loguzzzzzz...... do you use a lathe?

and earlier i was asking for more specifics. not the cut the weld and heat the lock tight and such.

[paintball72]

I assume you could do this with a classic valve?