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Old 01-31-2016, 10:44 AM #1
martix_agent
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bolt sticking forward

I'm not new to stacked tube guns, but it's been a while so I want to make sure that I'm on the right track with my thinking.

-I'm running an red valve with a GBR ram on a bushy without PDS.
-My dwell is 10 ms I believe.
-HPR is set to around 200psi.
-I have the black/silver solenoid; I believe that's a Parker brand.


The firing operation works fine while shooting a single shot at a time. Any time I fire at a high rate, the bolt will get stock forward and it will leak out the valve down the barrel. It's easy to pull the bolt back, and it will shoot fine again until I start to fire quickly. I have no idea what velocity this is shooting at. I suspect it's irrelevant to this problem.

I'm thinking I might have a solenoid issue. Perhaps it's even a low battery.
I lubed the GBR ram with monkey poo, because it seemed dry(and I've forgotten what happened to my radio shack gel lube). I don't believe that this is a lubrication issue, though.

Last edited by martix_agent : 01-31-2016 at 01:07 PM.
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Old 02-01-2016, 07:18 AM #2
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Start with a fresh battery and it sounds like it's possibly being air starved...reset dwell, hpr and lpr to stock settings and start there with new battery and full air tank. Could also be a gunked up noid but not sure..
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Old 02-01-2016, 04:55 PM #3
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Rear ram oring? Maybe a full strip and cleaning of your noir is needed
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Old 02-01-2016, 05:59 PM #4
martix_agent
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Quote:
Originally Posted by anarchyamp View Post
Start with a fresh battery and it sounds like it's possibly being air starved...reset dwell, hpr and lpr to stock settings and start there with new battery and full air tank. Could also be a gunked up noid but not sure..
The thing is that I've not been active in aftermarket ICD stuff for so long(epspecially this GBR and red valve) that I don't have a clue what "stock" setting should be. I don't have the stock ram, either. I trade all that stuff away to Nobody, I believe. Long ago.

Bone stock dwell is 8ms, correct?
Any idea what the HPR at for it?

LPR is set by turning it in until it leaks out the noid, and then backing it off 1/4 of a turn, correct?
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Old 02-01-2016, 07:48 PM #5
forstgump
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Yes for the LPR, 250 for the HPR.
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Old 02-01-2016, 08:08 PM #6
martix_agent
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hmm. you know what it is? it's my bolt getting stuck in the freak insert of my barrel.

interesting...

I also forgot how much ICd regulators suck. the creep on this promaster HPR is incredible. time for a deep clean.

edit:
wow. this HPR is terrible. I'm going to have to find a new one if I plan on using this gun for anything but a little bit of fun.

Last edited by martix_agent : 02-01-2016 at 09:03 PM.
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Old 02-06-2016, 06:51 PM #7
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in case anyone is wonder how this could be happening, I have found the problem! I feel both stupid and smart at the same time.

I had a .675 reball insert in the barrel. Apparently the bolt must slide into the barrel just a bit, because when I replaced the insert with a .682 size it works perfectly.
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