tank for impulse

[pball rampage]

im thinking of buying a nitro tank for my impy and i was wondering if i should get a 4500psi or 3000psi?

[toothpastedog]

how much do you have to spend? 4500psi tanks are always better than 3000psi tanks, because they hold more air. if you have the money, buy a 4500psi one, if no, get a 3000psi one.

[CCI]

You absolutely need a nitro tank for any high end marker. for the psi, it depends, I have a 68/3000, but if you buy a 45/4500 you will get aproximatly the same amount of shots. I don't know if this is true, but I read at a website that with a 4500psi tank you will get about 15 shots per each cubic inch(i.e. 45ci*15=680) 3000 psi, you should get about 10 shots per cubic inch,(i.e. 68ci*10=680) I don't know if this is true, anyone is free to correct me, so it doesn't really matter, but all I have to say, is don't buy a 48ci and under if it is only a 3000psi tank.

[toothpastedog]

Well, you can get away with using a/s co2 in most high end guns, but you are correct, hpa is always better.

#7 How many shots will I get from my tank?

These values are assuming you can get a full fill. If a CO2 tank is not chilled prior to filling it will not be filled completely (18oz in a 20oz tank). In addition most fields can not fill to a full 4500psi.

* For a 20oz CO2 tank about 1000-1200 shots as long as the tank has an anti-siphon tube installed.
* For a 68/3000 HPA tank about 800-900.
* For a 45/4500 HPA tank about 800-900.
* For a 68/4500 HPA tank about 1200-1300.
* For a 90/4500 HPA tank about 1600-1800.

All of these numbers are based on assumption that your dwell is set correctly for your air source.

NOTE: If you are using an LPR you should get MORE shots per fill than what is stated above.

Extra info on HPA tanks

Steel tanks will not get as good a fill as carbon fiber or tuff skin. When air is forced into a tank it is compressed (duh) This causes the air molecules to get "excited" and heat up. They also then expand. All HPA tanks will get warm when filled, but a steel tank actually gets very hot to touch. Fiber wrapped tanks do not have this problem to the same degree as a steel tank.

If you fill a steel tank to 3000psi it will get hot. Once you let the tank sit and cool off, the pressure will drop to about 2400psi. A fiber tank will only drop to about 2800psi.

Fiber wrapped and tuff skin tanks have to be hydro'ed every 3 years, steel tanks every 5 years.

It is better to fill your compressed air tank when there is air in it. You will ALWAYS get a better fill. This is because the more air that is in your tank at room temperature the less air you are adding and having heat up and expand in your tank.

You should never switch from CO2 to HPA or vice versa in the same day. One gas is hot the other is cold and all it will do is eat up your seals and o-rings. Switching from one week to the next, not a problem.

[Dr J]

Forget all that stuff everyone else just said. Here's all you need to know.




4500 gets you 50% more shots for the same size tank.
4500 has a better resale value
=====================
3000 are cheaper
=====================
both come with regulators on them to make the output around 850 psi