Low Chrono

[MuckRaker]

Put my new nitro tank on at the field today,went to chrono my gun and couldn't get it to go
over 180 fps. I checked the valve and cup seal, they're good. Spring is fairly new. Anyone got any suggestions
here.

Could it be O-rings?
Do I need to get a macroline kit?

BTW, it's a 68/3000 preset.

[Saiyan_warrior]

Try getting a stiffer hammer spring and crank your velocity a bit.

[Nitro]

contact john at pmi and tell him you are in desperate need of the pmi green spring, if you go to pmi website and on the forum check his profile has hisnumber there.

[Chrisb]

Did you try a co2 tank, if so and you had good velocity I would get the output pressure of your N2 tank checked, you may have a bad reg. You should be able to interchange from CO2 to N2 with only a small change in velocity.
If your velocity is also low on the CO2 tank then I would do as the others suggested and change you main spring to something stiffer.

[PiranhaPro]

Obvious question, but was your tank at least 850psi full?

The easiest thing to try is just to clean/oil your gun, and replace anything that looks worn. If that doesnt fix it try some new striker springs, if THAT doesnt work try a lighter valve spring.

[MuckRaker]

Hey Piranha ... The tank was completely full ... as for a valve spring, where can I get one (if I determine that's the problem)?

Also, I've got a chameleon spring set, which one would you recommend? Right now I'm using the Red one. Also, since I don't feel like butchering my Venturi bolt, should I consider getting a Delrin or like Bolt?

Thanks

[Chrisb]

Even though your tank was full doesn't mean that it is outputting the proper pressure, it would be a good idea to verify that the reg on the tank is working properly.
The stiffest spring in your kit is the Orange, try it first and if its to much, work your way back. I don't recommend touching your valve spring, it may end up causing you a new problem, and its not required.
Your venturi bolt is definitely not your problem, so spending money on another bolt or doing something to the one you have won't help.

Your problem more then likely lies in the input pressure or main spring tension. What model of Piranha do you have?

[PiranhaPro]

Actually the valve spring is a good one to tinker with. Using a lighter valve spring will allow you to use a lighter mainspring, this will decrease your chances of chopping(not by much, but it might give you that extra edge) and makes te trigger pull a bit smoother because less tension is on the sear.

I would personally recommend the Maddmann spring kit, as it has every spring you need, including valve spring. Plus they're cheap.

Your bolt should be fine. After I yank this venturi out I will not use my delrin. The oring on the front of the bolt really helps to use all possible gas on the ball, and decreases your chances of blowback going up the feed tube, as well as giving you a few more shots per tank.

[MuckRaker]

I called PMI Tech Services today and explained to them what was happening, the Tech Rep, a guy named Mark, suggested getting a Turbo Valve and inline regulator "such as our PMI Pure Energy Regulator," which made sense.

Although i found it odd that he said to adjust the reg until it says 500 to 600 psi passing through the gun. I figured it'd need to be all the way open to hit the guns operating pressure of 800 to 850 psi.

WTF up wit dat?

[MuckRaker]

Anyone know where to get one?

[PiranhaPro]

Well I see how the turbo valve can help, but putting a reg on there wont. It will starve the gun even more.

DONT BUY EITHER YET!

Buy a maddmann spring kit, and slap in a lighter valve spring. IF that doesnt work, go for a turbo valve.

Turbo valves are spyder compatable, many places carry them. G3pb.com for online, but I would just check your local store. They're about 20 bucks.

Catch me on AIM if you need more help...

[MuckRaker]

Piranha, who carries the Madman Spring Kit ... online, that is.

[Hsuve]

http://www.g3pb.com
Try there. :)

[Chrisb]

I'm not sure why I'm posting because I just get ignored anyway, but here goes anyway, your gun is designed to work on CO2 or N2 just as it is(unless you have modified it in some way). You don't need a new bolt, reg, valve, or valve spring. What you do need is sufficient input pressure and a properly tensioned main spring, and of course all o-rings must be good and no other physical damage.

Take it as you will

[Hydrian]

Here are some thing to try for high and low pressure guns...

check all the O-rings: partically the ones on the bolt. Make sure thay are properly sized and don't have any type of nicks in them.
Go and get shocktech or spyder spring kit. The basic ones are not usually strong enough. I used heaviest(Gold) of the Spyder Springs in my gun while it was high-pressure and then the medium(Silver) when I went low pressure. This is the most common fix.
If that doesn't work check for air leaks... the best way to do this is submerge the gun in a bucket of water so you can see the bubbles where the air is leaking.

[MuckRaker]

You da Man! :D

After all the suggestions, after all the calls to the folks who are supposed to know stuff ... PiranhaPro was right. I bought an o-ring kit, changed all the o-rings, and, as Emril Lagasse would say, "BAM" marker chrono'ed where it was supposed to.

Thanks a bunch for your help, and all the others who offered suggestions.:D

[Chrisb]

Well I did't see PiranhaPro mention anything about o-rings in this thread, I beleive it was Hydrian and I that suggested that.

I wrote:

"You don't need a new bolt, reg, valve, or valve spring. What you do need is sufficient input pressure and a properly tensioned main spring, and of course all o-rings must be good and no other physical damage. "


Hydrian wrote:

"check all the O-rings: partically the ones on the bolt. Make sure thay are properly sized and don't have any type of nicks in them."


I'm glad I'm not the only one being ignored ;)

[PiranhaPro]

Ahem...

Originally posted by PiranhaPro

The easiest thing to try is just to clean/oil your gun, and replace anything that looks worn.

"Anything that looks worn" includes orings. Since you try to be going for the "first" to mention orings and the like, there ya go.

This isnt a forum to compete with who knows more or who can fix more members guns. From the time you cam here it seems you have been trying to do so. You know a lot about Piranhas, no one is doubting that, but for the sake of this forum, lets not try to 'be the first' or get pissy when credit isnt given.

Countless times I've given advice that fixed a gun, do I get a thanks? Do I get a pat on the back? No. Do I ask for one? No. I know I helped them, thats all I need.

Just my two pennys

[Chrisb]

I'm not here to compete, nor to get a pat on the back, thats not what I am about. It looks like you help alot of people here and I'm sure paintball is better for it. But I do think that if credit is given it should be to where its due, thats all.

I have noticed in a lot of threads that people are pointed in far to many directions, sometimes far from the fix. All this will do is cost people money and upset them when the problem still isn't fixed. I'm not saying its you, just in general, I thought maybe I could help but I'm not doin much good, so I'll leave you guys to it.

[PiranhaPro]

No where did I say for you to get all ticked off and leave the forums. That's plain childish. But, if it's what you want to do, by all means, go for it.

[MuckRaker]

Chris, don't get all PO'd ... PiranhaPro has mentioned O-rings to me on AIM and in PM's, so just because he didn't post it in this thread, is no reason to believe that he didn't mention it ... although he did mention it to me before anyone else did. And, if it makes you feel better, I'll give you full Props for mentioning the MAGIC WORD!

GO CHRIS, GO!!

[PiranhaPro]

Muck I love you:D

[MuckRaker]

Restrain yourself:rolleyes:

[PiranhaPro]

I just.....can't;)