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Old 12-14-2012, 04:11 AM   #1 (permalink)
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HPA to co2 on the fly

I'm finally getting my hands on a phantom, after 10 years since my last one. I never bothered to play with the configuration of that one. But I have a question about using my current one. I want to be able to slap a reg in instead of my quick changer and run hpa on it. Obviously, this creates a change in psi to the valve. Are there regs that I can use in the 800 psi range, since i believe that's where co2 normally is? Or is re-springing for hpa a must?
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Old 12-14-2012, 08:47 AM   #2 (permalink)
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A Palmer Stabilizer will work great, but compared to a $3 spring, wow.
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Old 12-14-2012, 10:05 AM   #3 (permalink)
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I switch from a 20 oz co2 tank to a 68-4500 depending on where I am playing.
there is no need to put a regulator on the gun. my phantom is stock with an angled asa(important for co2)
you will need to re chrony because compressed air shoots less fps.
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Old 12-14-2012, 10:06 AM   #4 (permalink)
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Depending on your springs, valve, and barrel, you might find a sub 800psi HPA setting that matches your CO2 velocity. I think that means your CO2 is on the high side of the valve sweetspot. Going to lower pressure HPA usually needs a good length barrel (10" unported) since the pressure curve is longer.

If you can find or borrow an adjustable bottle, you could poke around on it to see what it needs, then set up a ninja reg for the right pressure. I think you would set up for slightly higher velocity with 12gs, and take the lower velocity with HPA, so that you keep the efficiency up on the 12g side.

It's definitely something that will take some tuning and testing.
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Old 12-14-2012, 01:25 PM   #5 (permalink)
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Not interested in too much tuning and testing. I guess my biggest question is can I get enough fps from a 400psi output tank to get usable shots? Seems the answer is yes?
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Old 12-14-2012, 02:37 PM   #6 (permalink)
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400PSI output tank will NOT give you good velocity... at all.
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Old 12-14-2012, 02:40 PM   #7 (permalink)
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^Yup.

My tank is 650 psi output and it shoots 280 fps. However, I have a tight paint to barrel match and I am running an open-face TPC.
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Old 12-14-2012, 03:07 PM   #8 (permalink)
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That's what I thought. Time to look into another way of handling this.
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Old 12-18-2012, 04:33 PM   #9 (permalink)
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Quote:
Originally Posted by capitalpaintball View Post
you will need to re chrony because compressed air shoots less fps.
That's been my experience. Going to CO2 adds around 20fps.
Re-chrono, yes.
Re-spring, no.
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Old 12-18-2012, 05:14 PM   #10 (permalink)
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Lets say your running hpa and it's tuned for the lightest pump stroke with the lightest set of springs posible like mine is?I switch out my springs going to co2.
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