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Old 05-25-2008, 02:46 AM   #1 (permalink)
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Lowest possible Phantom operating pressure

For my new phantom project I'm gong to be using a palmers stabilizer. I'm doing it for consistency and ease of chronoing. So onto my questions...

1. I'm looking at the fatty stab due to its small size, just so you know I'm not mounting my stab next to the valve. Because the fatty only does a max output of 400psi will I run into problems on my phantom (I know the prefered O.P. is 800psi)?

2. Can I replace the internals of a fatty stab to make it go HP?

3. Off-topic quesion: Do the Wevo U/C kits wobble?

Thanks,

Arpie
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Old 05-25-2008, 04:15 AM   #2 (permalink)
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Read this, among others: Low pressure Phantom. How low?
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Old 05-25-2008, 05:09 AM   #3 (permalink)
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Okay, LP in phantom=bad. Is there any reason why the fatty is LP only?

Thanks,

Arpie
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My *** would hit Canada so quick that the sonic boom would be heard across the nation.
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Old 05-25-2008, 09:20 PM   #4 (permalink)
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Quote:
Originally Posted by arpie View Post
Okay, LP in phantom=bad. Is there any reason why the fatty is LP only?

Thanks,

Arpie
it is made specifically for LP it has faster recharge rate just for that reason
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Old 05-25-2008, 11:14 PM   #5 (permalink)
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You might want to look into the sideline stabilizer or even the phantom stabilizer, which uses a stabilizer as a phantom valve body.
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Old 05-26-2008, 12:00 AM   #6 (permalink)
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I beg to differ.

I'm not sure what you quantify as Low Pressure. I run a Sideline Stab on my VSC Phantom, and still manage about 200 shots from the 3.5 oz tank. It runs at around 175 PSI input to the valve. I rarely have any of the velocity issues that plague most Phantoms. The vertical bottle helps a lot with shoot down and the typical problem of sucking liquid into the valve. With a fatty Stab, you'll likely have to switch to an anti-siphon Co2, or 13/22 CuIn HPA tank if you're an auto-trigger monkey.



The key is to swap the nylon setscrew on the velocity port compensator for a stainless steel one once you have the Phantom chrono-ed. That will keep your velocity locked down tight
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Old 05-27-2008, 03:07 AM   #7 (permalink)
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Do those stainless steel ones come in a pack from wevo? The setup I'm looking at would be to buy a VSC kit and run a hawaiian style bottomline setup with a 3.5oz. So the CO2 goes through a on/off then upwards (helps with shootdown) into a stab screwed into the VSC port. Then a line from the VSC kit into the valve. I just don't like the look of a stab sitting next to the valve. Read that the stab means its just easier to keep the fps stable for long periods of time with the nylon screws.

Thanks,

Arpie
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My *** would hit Canada so quick that the sonic boom would be heard across the nation.
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Old 05-28-2008, 04:34 PM   #8 (permalink)
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Quote:
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Do those stainless steel ones come in a pack from wevo?
Nah. it's just a #10-32 setscrew from the hardware store. It was a hair too long so i had to shave it down with a dremel.

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Old 05-28-2008, 04:40 PM   #9 (permalink)
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Quote:
It runs at around 175 PSI input to the valve
I've got to call shens on that. Based on everything I've seen, including running a phantom with a reg myself... there is almost no way you could run a phantom that low and be shooting 275-285 fps. You may want to get a better gauge.

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Old 05-28-2008, 07:58 PM   #10 (permalink)
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It seems that at 175psi, you would have to have such a weak valve spring (or strong main spring) to get any velocity, that you would never be able to cock the gun... the pressure pushing back from the main spring on the hammer wouldn't let the bolt get close enough until you pushed the hammer all the way and opened your valve.

If you could possibly increase the size of the powertube enough that your airflow was high enough, then I could see having such a low pressure, but I know i've never seen a valve tube that big!
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