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Old 02-12-2011, 03:13 PM #1
Bushwood Bill
 
 
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Quest problems

Need a little help with my Critical Quest with APE board. LPR at 100psi and HPR set shooting 280fps. When in semi shooting slow the gun does fine, however when you start shooting fast it sounds like the bolt isn't completely cycling. When you put it in full auto and keep you finger on the trigger the bolt stays forward and it sounds like a rental gun running out of CO2.. Any ideas?

Oh and the board is all set to default with dwell at 15 and has new battery..
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Old 02-12-2011, 04:59 PM #2
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What lube are you using? Might be too much lube. May also be an O-ring issue.
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Old 02-12-2011, 05:06 PM #3
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What lube are you using? Might be too much lube. May also be an O-ring issue.
All o-rings replaced. Tried Lurker lube and Sleek (Dow 33) and no difference.
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Old 02-14-2011, 03:04 PM #4
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whats your dwell.

Also make sure your tank isnt screwed in too tight. Try a different asa.. Sounds like an issue I had before
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Old 02-14-2011, 03:18 PM #5
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whats your dwell.

Also make sure your tank isnt screwed in too tight. Try a different asa.. Sounds like an issue I had before
Dwell is default 15ms. When I got the gun it was shooting low so I uped the HPR to about 280 and it then changed the LPR pressure from doing so. From what I understood the LPR shouldn't move when making velocity adjustments..
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Old 02-14-2011, 04:11 PM #6
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set the lpr at 90 and leave it. then adjust for velocity using the HPR. Then, over time, drop it to about 80 or until you see consistancy problems. then bump it up a bit. But 90 is a good start.

It sound like your gun is being starved of air pressure at high rates of speed. That narrows down the search too -

Tank being screwed to far in (like fallin said) and its shutting off the inflow of air.
Tank reg is set to output a low pressure (less than 400 psi) which gave me shoot down problems as well. I set mine to 650, anything above that will also work.
Tank reg may be incorrectly re-assembled. If you or anyone has serviced it recently, de-gass it and take another look at it.
Make sure that the orings are not only free of defects, but they are the correct size.
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Old 02-14-2011, 05:02 PM #7
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Originally Posted by eatafetus View Post
set the lpr at 90 and leave it. then adjust for velocity using the HPR. Then, over time, drop it to about 80 or until you see consistancy problems. then bump it up a bit. But 90 is a good start.

It sound like your gun is being starved of air pressure at high rates of speed. That narrows down the search too -

Tank being screwed to far in (like fallin said) and its shutting off the inflow of air.
Tank reg is set to output a low pressure (less than 400 psi) which gave me shoot down problems as well. I set mine to 650, anything above that will also work.
Tank reg may be incorrectly re-assembled. If you or anyone has serviced it recently, de-gass it and take another look at it.
Make sure that the orings are not only free of defects, but they are the correct size.
The LPR is set at 100psi straight from Critical. Once I tried to lower it and it wouldn't even cycle so I raised it back to 100. As for the tank its a HP Crossfire and it works great on every other gun so thats not it. I'll get some more air tomorrow and see if it makes a difference not screwing it in all the way..

Thaks for the help. I'm sure its something simple..
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Old 02-14-2011, 06:03 PM #8
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Somthing similar to this, one of my team mates was having trouble with his LPR where it would only shoot at about 140 PSI

Once you would start shooting the bolt would stick forward when you got above about 3 bps
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Old 02-15-2011, 12:58 AM #9
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I have a broken lpr gauge so make sure that isn't the issue... Mine has to read 140-150 or it won't cycle properly. dunno what its really set at until i get a new one..
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Old 02-15-2011, 04:03 PM #10
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Got it fixed!! Ended up being the reg.. I'm now very happy with my purchase.
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Old 02-15-2011, 04:55 PM #11
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what was wrong? Improper shim stack?
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Old 02-15-2011, 05:12 PM #12
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what was wrong? Improper shim stack?
Actually the stack was correct, but hardly any lube. I took it apart re-lubed and it works like a charm..
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Old 02-15-2011, 06:00 PM #13
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Old 02-16-2011, 01:11 AM #14
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Maybe i should ry that i replaced my lpr gauge an it wont cycle unless im aroun 105-115 psi..
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