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HPA Low pressure on A-5 |
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Legion-kgb 
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Joined: 19 February 2006 Status: Offline Points: 11 |
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 Topic: HPA Low pressure on A-5Posted: 22 February 2006 at 11:53am |
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I recently bought an HPA tank for my A5. I got the tank and hooked it up and all it does is sputter and uncock itself. The same thing happens when I hook up my back up marker, my spyder. Is this what would happen if the tank was a low pressure? The company I ordered it from is claiming that they sent out a high pressure tank. The tank is a pure energy 68/4500. Thanks for any input.
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CHUNGENILE
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Joined: 21 February 2006 Location: United States Status: Offline Points: 58 |
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Posted: 22 February 2006 at 11:58am |
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Usually if the neck of the tank is red it is high and if it is blue it is low. |
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A-5
egrip WAS BOARD QEV Palmers Stab LPK Ricochet Hopper Polished Internals Crossfire 68 4500 Lapco Bigshot JCS Trigger Remoteline red dot Apex Empire 11 piece barrel kit Adj stock |
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Legion-kgb
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Posted: 22 February 2006 at 12:01pm |
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hmm...there is not any red or blue, its just silver, the whole reg is just slate gray with the pure energy symbol on the reg.
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CHUNGENILE
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Posted: 22 February 2006 at 12:11pm |
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I'm not too familar with HPA tanks, I just got mine in a few days ago. I was just letting you know what I was told when I was shopping for mine. I'm sure someone with more knowledge will help.
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A-5
egrip WAS BOARD QEV Palmers Stab LPK Ricochet Hopper Polished Internals Crossfire 68 4500 Lapco Bigshot JCS Trigger Remoteline red dot Apex Empire 11 piece barrel kit Adj stock |
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Snake6
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Posted: 22 February 2006 at 12:54pm |
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This is a common problem with A-5's on HPA. The Problem Results from
the fact that High Output HPA tanks have an Output or between
700-800psi, wheras CO2 tanks can hve higher outputs upto 1100psi thus
giving you a higher velocity. The easiest way to fix this is to Get a
Maddmann Spring Kit, or a RVA. Either of these will give you enough
spring pressure on the valve to open it enough to give you a higher
velocity.
Search Next Time. |
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Legion-kgb
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Posted: 22 February 2006 at 2:17pm |
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This tank is supposed to have a set output of 850psi. I have an RVA and
the red spring from madmann is in my gun. I have a very small screw in
my dead on powertube that leaves no restriction of gas. And besides the
spyder does the same thing. So sorry about the search.
--L. |
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Snake6
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Posted: 22 February 2006 at 2:26pm |
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You are not supposed to have both a Maddmann and a RVA on your gun. They effectively cancel each other out.
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Legion-kgb
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Posted: 22 February 2006 at 4:37pm |
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lol, whatever dude. this is my setup:
http://www.pbownersgroup.com/forum/messageview.cfm?catid=6 78&threadid=3253&enterthread=y |
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KALIS-PIMENTA
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Strike 2 for inflammatory posting 3/3/06 Joined: 19 January 2006 Location: United States Status: Offline Points: 342 |
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Posted: 22 February 2006 at 6:21pm |
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Good setup!!!
 The link doesn't work!!
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Tippmann A-5
Polished internals Rampage Board Rampage Pro-E Trigger TechT A-5Mod QEV mod Lapco autococker Adapter STIFFI Kit JCS Power Tube PALMER Stabilizer LPK PsychoZ-DF Ricochet R5 |
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Snake6
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Posted: 22 February 2006 at 8:30pm |
Whats to Laugh about? I am telling you the straight facts. Most likely your tank output is around 700psi instead of 800psi, which is enough to recock the marker but not enough to bring you up to field speeds. |
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Legion-kgb
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Posted: 22 February 2006 at 8:36pm |
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Whats to Laugh about? recock the marker? the whole problem with my tank is that it ISNT recocking my marker. And what are you talking about the RVA cancels out the spring? So are you saying that it has no effect on the normal spring? And how does a high input tank that has a reg set for 850 give me 700 to 800? Edited by Legion-kgb - 22 February 2006 at 8:38pm |
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mjicmike
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Posted: 22 February 2006 at 9:52pm |
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I have a PMI tank but the larger one. How much air do you have ? are you over 1000 PSI on your gauge ?
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A5 Rfs Dwg triggr
Ricochet R5 8"Lapco Bigsht/14"CP Classic Palmers Stab. Lapco uni-mount DOP bullet drop fwd PMI 88/4500 Woods Flatline/14"Lapco Bigsht CMI Thunder pig reg. Remote adj. stk |
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hansolo8221
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Posted: 23 February 2006 at 12:30am |
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Snake6, check your facts first. PMI HPA tanks have a preset of either 450psi or 850psi, so your 700-800 is impossible (not to mention that I have never seen a high output preset tank at 700; I've only ever seen 800 or 850). Legion, I would say that you probably got a low output tank. I don't know how PMI's diferentiate between the two; the red/blue color coding is standard on Crossfire tanks, but with PMI's I don't know how to tell. If your gauge shows your tank is full, and you supposedly have a high output tank, then your reg is probably defective, or clogged with something (or your gauge is wrong). I would take it to a Proshop to have it serviced. Next, about the RVA/spring combination. I see no reason that they cancel each other out. Check my sig. First I added my Stab, then I added a Trinity medium/high tension spring (not in my sig; ran out of room). I lowered the output on my Stab to about 700psi, and the stronger spring kept the valve open longer to keep my velocity in the right range;basically the same idea behind a LPK (BTW, I never had ONE re-cocking problem even at 700 WITH a high tension spring). After that, I swapped my velocity screw out for a shorter one, so that I never had to move it and it did not affect airflow through the powertube (I am considering filling in the hole for it altogether; JCS also makes a powertube without a hole for it, same idea). Then, I added my RVA so that I could fine-tune my velocity, and used both the RVA and the output of the Stab to keep it set right. The only reason I could think that Snake6 would think that an RVA/spring combination would be counterproductive is that (this is true for my JCS; I don't know if it is for other brand RVA's as well) the only way for the JCS RVA to be set at the same point as the stock end cap is for the adjustment screw to be turned all the way in. Therefore, all the JCS RVA can do is LOWER spring tension, by turning the screw out. Snake6 may be saying that putting in a RVA that lowers tension and a spring that raises tension cancel each other out. However, other RVA's may operate differently. Also, leaving in the stock spring would only allow you to take the pressure down from the stock level. Putting in a high tension spring instead gives you a wider overall range of adjustable velocity. Edited by hansolo8221 - 23 February 2006 at 12:33am |
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Tippmann A-5
12" J&J Ceramic Barrel J&J aluminum .45 style grip KAPP micro apocalypse drop Empire On/Off bottomline JCS Rear velocity adjuster Palmer Stabilizer PMI 12oz CO2 with anti-siphon |
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Snake6
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Posted: 23 February 2006 at 7:23am |
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Sorry, I got some of my threads screwed up. I was answering a different thread in Gun Maintinance and Repair with someone complaining of low velocity and this one at the same time. I answered this thread with the info for the other thread. Excuse my error.
Hansolo, to answer your post. What I was refering to was that sometimes a 800-850 preset will put out 700psi or less. We have 48/3k tanks that we use as rentals at the field, and every once and a while one will for whatever reason will start putting out lower pressures, I dont know why, but I guess it comes from the regs getting worn. That was what I was think in my post about the 700psi, sorry if I didn't make myself clear. Every Tippmann RVA that I have seen adjusts the spring pressure down, not up. I have Firstout's RVA on my Pro/Carbine and some generic one on the A-5. Both of those adjust outward about 3/4 of an inch, and the A-5 one doesn't adjust inward at all. The Pro/Carbine one only adjusts inward about a 1/8th of an inch. |
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Legion-kgb
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Posted: 23 February 2006 at 1:14pm |
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right, but if you put in a stronger spring then you have a higher area
of ajustment. Thanks for all of your help, no hard feelings.
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Snake6
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Posted: 23 February 2006 at 1:17pm |
That is true, but you would have an even higher area of adjustment if you would just use the stock endcap. I have the feeling that you are running a LP tank. Check the output of the tank with a guage. |
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Legion-kgb
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Posted: 24 February 2006 at 7:24pm |
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I did. The tank is @ 350 psi, so I guess its a bad reg. Thanks again for all of your help.
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Legion-kgb wrote: