12 replies to this topic

[blister]

1) What is the recommended number of pumps for an SM5k without tank relocation?

2) When I pump my SM5k w/ pump plugged five times, and fire, it releases some air and then closes the valve. It requires a second trigger pull to release the rest of the air. It does this mainly when dry firing. Why does it do this?

3) Is there a reason that the R.S.C.B. writeup here only uses 11 inches of SCH80 PVC? I am planning on doing it for my SM5k, but I want it to be the full length of the gun. Does it reduce range if the clip is longer?

4) Are SM1500 turrets more efficient to use as opposed to 2k turrets on a different gun? I am asking because the SM1500 turret hole is much wider than the 2k.

5) After removing the AR's from my Double Shots's shells I saw a noticeable loss in range. I didn't CPVC them yet. Is this normal?

6) Does using tightening rings in air pressure guns affect range (in an SM5k)? I want to know if I should buy more brass.

7) After my SM5k check valve broke, I replaced it with one from a Blastfire. The Blastfire pump didn't fit as perfectly as expected and sticks out a little. For those that own an SM5k, know that the pump handle can only go so far as the green shell of the gun. Am I losing a noticeable amount of range by this loss of air volume?

8) Can you really get 120' from an At3k? I have seen two cases where people claim to have gotten around that range, one with the turret and one without.

9) My Secret Shot 2 valve is being a bitch. It was working pretty well for a while until it developed a leak. I started putting lubricant down the pump, and pumped it, as prescribed by other topics. Then, it started leaking so badly, that you can't even pump it twice without the tank being empty. I opened it up, lubed everything, and gooped it back together. It is still leaking just as badly. Is there any hope? Or is someone willing to sell me another?

10) Why does my BBB suck with brass barrels? I used 12" of brass, and my darts were a perfect fit, but the darts didn't even leave the barrel. I use around 9" of CPVC and they go 100'.

11) How much are NIB Eagle Eye's worth? I have the oppurtunity to obtain two, but don't know how much I should offer.

Thanks.

[nerfer34]

I'll answer as many as I can




1) What is the recommended number of pumps for an SM5k without tank relocation?

DON"T KNOW

2) When I pump my SM5k w/ pump plugged five times, and fire, it releases some air and then closes the valve. It requires a second trigger pull to release the rest of the air. It does this mainly when dry firing. Why does it do this?

DON;T KNOW

3) Is there a reason that the R.S.C.B. writeup here only uses 11 inches of SCH80 PVC? I am planning on doing it for my SM5k, but I want it to be the full length of the gun. Does it reduce range if the clip is longer?

WELL, YOU GET MOST RANGE WITH THE SHORTEST "CLIPS". I HAVE SO MUCH TROUBLE MAKING THESE THINGS AND FIND THEM TERRIBLY INCONSISTENT.

4) Are SM1500 turrets more efficient to use as opposed to 2k turrets on a different gun? I am asking because the SM1500 turret hole is much wider than the 2k.

THE HOLE DOESN'T REALLY MATER, THE AIR FLOWS ABOUT THE SAME THROUGH THEM BOTH. AT MOST YOU MAY GET A 5' DISTANCE.

5) After removing the AR's from my Double Shots's shells I saw a noticeable loss in range. I didn't CPVC them yet. Is this normal?

DUNNO

6) Does using tightening rings in air pressure guns affect range (in an SM5k)? I want to know if I should buy more brass.

YES IT WILL HELP. THE TRs MAKE ALL OF THE PRESSURE BUILD UP, in air guns all the air eleases at once, so you should only use TRs, if your darts are a little loose in your size brass.

7) After my SM5k check valve broke, I replaced it with one from a Blastfire. The Blastfire pump didn't fit as perfectly as expected and sticks out a little. For those that own an SM5k, know that the pump handle can only go so far as the green shell of the gun. Am I losing a noticeable amount of range by this loss of air volume?

DUNNO
8) Can you really get 120' from an At3k? I have seen two cases where people claim to have gotten around that range, one with the turret and one without.

I say No. CERTAINLY NOT WITH THE TURRETED ONE. I THINK THE 2K IS MORE POWERFUL.

9) My Secret Shot 2 valve is being a bitch. It was working pretty well for a while until it developed a leak. I started putting lubricant down the pump, and pumped it, as prescribed by other topics. Then, it started leaking so badly, that you can't even pump it twice without the tank being empty. I opened it up, lubed everything, and gooped it back together. It is still leaking just as badly. Is there any hope? Or is someone willing to sell me another?

SS2 vlaves are always a bitch, never overpump them. I DUNNO.

10) Why does my BBB suck with brass barrels? I used 12" of brass, and my darts were a perfect fit, but the darts didn't even leave the barrel. I use around 9" of CPVC and they go 100'.

I found the same exact problem today. I really don't know why. It has to be something with the air output on the BBB. I found that PETG works very well.
11) How much are NIB Eagle Eye's worth? I have the oppurtunity to obtain two, but don't know how much I should offer.
Well since its NIB I'd say around $15-18. They're solid guns, nothing special.

[General Cole]

3. The longer the clip the more air it has to become a median with, I would do the 11 inch and just put a sealable extension on it.

10. It may be the tightness

Sorry, I don't know the answer to any of the others. But I do believe that 2K turrets are used more because they are easire to obtain.

[sniper25]

1) What is the recommended number of pumps for an SM5k without tank relocation?
4, with mine I had the same problem with it not releasing all the air on the first trigger pull. I have no clue why this happens but I found that 4 pumps should give you the most air released on the first trigger pull. i get about 105' with mine.

[b00m13]

Question 9. I hate those super tiny leaks that somehow makes it impossible to pump air into bladders. It seems like every time there is one, using goop, epoxy, E-tape wil only give it a temp solution... until they fail.
I think the goop and epoxy fails because it becomes super hard and smooth. Whenever I want to get dried up epoxy out of a crayola tube (don't ask how I got it in there in the 1st place), I just have to press on the tube a bit and since the epoxy wont flex, it loses it's grip and out it goes. As for E tape... that's just obvious... it stretches with little to no force applied.
This got me thinking, how come when we plug up pumps we always use Hotglue?
Well, since it's semi flexible, it can adjust itself if it's surrounding is changing due to pressure. If it's so simple, why not just put hotglue over a leaky spot? Because the leaking spot is too small for the hotglue to get into and be effective, so the hotglue just becomes a flexible shell covering over a hole (Like a harder E-tape wrapped around a seal.)
How can we get the hotglue into the hole completely then? It's just a thought, but have you considered using a drill bit (SUPER SMALL/THIN one) and drilling the leaky spot bigger. That way hotglue can enter the hole, apply itself to the borders around it, and make a perf seal. How will you keep the hotglue seal from shooting out due to high pressure? I guess now is a good time to put those epoxy, E-tape to use. I'd apply epoxy all over the hotglue seal, when it dries, then I'd wrap several layers of super tight E-tape around it.
If that air still want to escape, it's gonna have a hell of a hard time getting through.



Question 10. When I first used Tbe Cutters in class, the prof said to take your time. I was impatient so I tightened it after every 1 rotation, by doing this, it cut the tubes quicker, but it also bend the tips of the copper every time. It would look like a circle, but at somewhere, instead of a curve, there would be a straight line that would greatly interfere with the bullet exiting the barrel. Also make sure you use the triangle widener tool that's usually installed in most tube cutters, because if you're cutting metal, it's highly likely that when you're pressing down on the copper, you're pushing the metal inwards (even a slight inward curve could mess up your shot, maybe even prevent it from exiting). So always twist an turn that tube widener in your tubes every time you cut it.

[Retiate]

Sorry, I don't know the answer to any of the others. But I do believe that 2K turrets are used more because they are easire to obtain.

And because most people single the 2k anyways. I rarely see a singled SM1500.

5. How much range was lost? Are you using stock darts? My guess is you drilled the hole in the back too wide and it doesn't seal all the way with the plunger anymore.
6. I would only add tightening rings if your darts can slide down the barrel.
8. Unless they are pumping it to the extreme, I don't think it's possible. Out turreted 3k gets somewhere in the 70' range with 4 pumps. To get 120', you would need to have perfect barrel set ups, a perfect seal, and be pumping it somewhere around 10 times, where you risk having your airtank explode every time you pump it up. So no, I don't really believe it possible. Maybe the ranges you saw were angled?

[bpso86]

For numbers 1 and 2, I know just what you're talking about.

As stated previously, four pumps is the most I use/need. I've pumped it up to seven before, but only once. Four is more than enough.

Also, the reason why you aren't releasing all of the air on the first trigger pull is due to the fact that the sm5k has a spring attached to the air tank release. The trigger hits the spring, which hits the firing pin. This doesn't give enough force to release all of the pressure, and the remaining pressure in the tank quickly closes the valve again before all of the air can escape. The fix: Open the gun up and fill the spring with hot glue. This will give you the desired stiffness and you can now release all of the air with one trigger pull, no matter how many pumps.

[SHADOW HUNTER ALPHA]

5: Look on the back of the shell. You should see a raised circle there. If you don't, then the seal between the plunger tube and the shell has been lost, and you need to replace that ring somehow. Otherwise, the problem is internal with the shells.

[TED]

I always thought that tightening rings were for spring powered guns in order to add pressure. With air guns it is unnecessary.

[blister]

Thanks for all the responses.

I have another question: If I do a bic mod to my SM5k, and leave that quick release mechanism, is it more beneficial than taking off the mech?


To everyone -

1) Thanks, four is what I normally do anyway.
2) Thanks, glad to know I'm not the only one.
3) Thanks, it seems that the R.S.C.B. sucked for me anyway.
4) Thanks, I just wanted to know if there are any benefits.
5) I've been using stock darts, and I will eventually use CPVC and stefans. Thanks.
6) Yea, I've heard that tightening rings are only for springers, but I wanted to be sure.
- 7) Still interested.
8) Thanks, I'll experiment.
9) b00m, the leak isn't from the sealing of the tank, it's the sealing of the valve. But, thanks.
10) Oh well, I don't think the BBB has enough air output, but it has lots of speed.
11) Well, if anyone wants to buy them, contact me.

[Thom]

I always thought that tightening rings were for spring powered guns in order to add pressure. With air guns it is unnecessary.

A single tightening ring would serve to hold the dart in the back of a barrel to prevent it slipping into a coupler.

[frost vectron]

For #7, it sounds like you're not losing any range from it. It just sounds like your pump strokes aren't as long as they were before, with the pump change. This only means that it might take more pumps to reach optimum pressure (if the sizes of the pumps are similar, then it isn't a big deal). You might pump it one more time than other SM5000 users pump theirs to make up for the shorter stroke.

Edited by frost vectron, 03 August 2007 - 06:20 AM.

[Yazzeh]

Just for clarity, yes, you will lose range when you remove the AR from the shells in the Double Shot. The reason for this is:

1. The rod (part of the AR) is what gives the dart any friction. Without that, the dart can pretty much fall right out of the shell.

2. When you remove all the junk inside of the shell you open up a lot of empty space. All the space has to get filled up with air before it starts to push the dart, which means you have less force as well.

3. The CPVC you put inside focuses the air, cuts off the rest of the shell's empty space, and adds the friction you need to get the range boost.

Hope this clears everything up.