Psi???

[Silent-Version]

Help! I've been trying to figure this out, but sadly I am but a newbie... What is the Deal wit psi??? I hear things like i get 300psi and say its better than 800psi but wont more psi make the ball go faster? and wont it have more air to cock the gun? is there a site that explanes this? or can you people help me out? i need the full explanation.

Check it.:crazy:

[Rugrat]

First off PSI (pounds per square inch) is just pressure the gas at.

In order to shoot a paintball youneed to have a centain amount of gas (Volume) and a certain pressure (PSI). If you lower one you need to increase the other to still shoot at 280 fps.

Lower is better? If your running at lower pressure you will be able to shoot at lower outside temps with CO2 or get a few extra shots out of your HPA tank.

You talked about reocking, so I assume you are talking about blowbacks. LP blowbacks have weaker main springs than standard HP blowbacks to make up for the lower operating pressure.

If you still have questions just ask me.

[Silent-Version]

So if you have to raise one if you lower the other, if you have 800 psi won't it use less gas than if you had 300 psi?
Also i hear people talking about recharging regulaters, does this just mean filling up wit gas? And finally how can you tell what psi your marker is shooting at?

[Rugrat]

Yes it will useless gas running at 800 PSI compared to 300 PSI but, here comes the hook, with HPA and CO2 systems you lose pressure faster than you lose air. Your tank volume stays teh same but your pressure goes down every time you shoot till the pressure drops to low for your gun. Your tanks never really empty out they just run out of pressure.

Reg recharge rates. All a regulator does is maintain the output pressure of a chamber (the area between the regulator and valve) at a set PSI. Now think of that area as your kitchen sink, the regulator has set the PSI as your house's water pressure. The recharge rate (how long it takes to fill your sink) depends on how much you open your fuacet. Fast regs, like Max-flo Regs, is like the faucet all the way open, slow regs, cheap POS regs, is like the faucet barely open. If you shoot faster than the area can refill (more water out than in) you choke off and fail to shoot.

Knowing your PSI requires a gauge onthe output side of your reg.

[Silent-Version]

Wow, thanks ALOT. the clouds have parted, now i'm smarter than a couple hours ago, HOORAY! But really that helped me alot, i feel like saveing this thread for future refrence, due to my short memory/attention span. :shy:Judging from the fact that my name is plastered all over the article and I included a copyright notice, I'd be inclined to think it was me who wrote it.My mom doesn't like me owning a paintball marker either but what is she gonna do? i'm 23 and i live in my own dang house

[draxxus4lif]

but doesnt high psi make it shoot faster and how do you mess with the volume

[Rugrat]

Not really, max ROF depends on how fast the marker can cycle. If you have high PSI pushing against a really stiff main spring or low PSI and weak main spring you balance out and they are about the same.

How do mess with the volume/gas flow? Turbo Valves, Low static pressure bolts, high flow valve stems, drilled ASAs and filters. Basicly a LP mod.

[Dancing racoon]

Your ROF depends on how fast your valve can recharge now there is input pressure which is what your talking about and tank pressure which is 3000 - 5000 psi tank pressure

[Rugrat]

Your HPA tank may be rated at 3000 or 4500 PSI but the reg, preset or variable, steps that down. Yor markers operating pressure is much lower around 200-800 PSI depending on what kind it is.

Your gas system will stablize, unless you have a crappy or improperly set up system, faster than the time it takes the bolt to fire, pull back, load the next ball, and slide forward again. And both will be faster than you can pull the trigger.

[draxxus4lif]

no i mean if the psi is say at 1000 WOULD IT shoot at a higher fps then say 500 psi

[Rugrat]

Yes it would. That is why CO2 systems should be rechrongraphed if the temp changes.

[HP_Lovecraft]

Originally posted by draxxus4lif
no i mean if the psi is say at 1000 WOULD IT shoot at a higher fps then say 500 psi

Its much more complicated then you think.

CO2 is a really funny liquid/gas.

As mentioned above, at 50 degrees, the pressure is 500psi, but at 90 degrees, the pressure is 1000psi.

Big difference!
However, if your guns runs on liquid CO2, then the pressure will DROP when the temperature goes above 88 degrees. This is because above 88, the liquid turns into "super critical co2", even though the pressure is higher. Wierd!

Also, if the pressure drops from 1000psi to 500psi, there is also less pressure holding the cupseal back, meaning the hammer can open the valve longer. On some setups, this can mean that a lower pressure can create a higher velocity. Weird again!!

Nick