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Removing regulator from Diana Stormrider

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(@mtipton)
Texas
Joined: 5 years ago
Posts: 15
Topic starter  

My new Stormrider with a PA installed regulator was delivered yesterday. Based on the article in Hard Air magazine I asked them to set it at 125 Bar. Which they apparently did. After shooting it and chronying it, I want to back off the setting. I am more interested in a good shot count than velocity.

The regulator is removable, the process looks pretty straightforward, but is said to be hard to do. I am looking for guidance and tips for the process.


   
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marflow
(@marflow)
Washington
Joined: 7 years ago
Posts: 1603
 

looks like a long threaded rod will be needed or a very long screw driver and some guessing 


   
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(@mtipton)
Texas
Joined: 5 years ago
Posts: 15
Topic starter  

I have the installation rod and I have watched the videos. The process looks pretty simple. But the guys at Hard Air described it as hard. I was hoping that someone has actually done it. I don’t want to become the expert!


   
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marflow
(@marflow)
Washington
Joined: 7 years ago
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i don't see why you would pull it out, if you can adjust it with a long number 2 flat blade screwdriver 


   
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(@mtipton)
Texas
Joined: 5 years ago
Posts: 15
Topic starter  

@marflow It would take a very long screw driver and you wouldn’t be able to see how you were adjusting it.


   
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marflow
(@marflow)
Washington
Joined: 7 years ago
Posts: 1603
 

https://www.harborfreight.com/2-piece-super-long-screwdriver-set-34253.html?cid=paid_google|||34253&utm_source=google&utm_medium=cpc&utm_campaign=&utm_content=&gclid=EAIaIQobChMIuqCz0KuP6wIVviCtBh1cCgyfEAQYASABEgIaIfD_BwE

well you have 2 choices 

yank the valve or adjust it place 

i have done neither 

i have done many thing with tools i could see 

buy a driver and try it and treat it like a clock 

and they do make small cameras that could be dropped down the tube and hook in to a smart phone 


   
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(@fivestar45)
New York
Joined: 7 years ago
Posts: 79
 

It's the same reg as fitted to the Disco,P'rod etc. I've pulled them out with no difficulty. The only problem you might face is having an o ring get nicked so best to have some spares on hand. Altaros will give you the sizes if needed.


   
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(@hector_j_medina_g)
Maryland
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Posted by: @mtipton

My new Stormrider with a PA installed regulator was delivered yesterday. Based on the article in Hard Air magazine I asked them to set it at 125 Bar. Which they apparently did. After shooting it and chronying it, I want to back off the setting. I am more interested in a good shot count than velocity.

The regulator is removable, the process looks pretty straightforward, but is said to be hard to do. I am looking for guidance and tips for the process.

125 BAR is the recommended set point for 20 ft-lbs yield. So, unless you were thinking of hunting, it is not the best.

Removing the regulator is not hard nor bad, I've done dozens of them. IF Pyramyd Air did the installation properly. And here goes the main issue with these guns:

They are NOT refined guns. Meaning that the threads are cut, and the tube is sent to bluing, result? Hard, sharp edges on the threads.

NOTHING that cannot be "cured" with some common Scotch-Brite from under the kitchen sink and some elbow grease. Something that SHOULD be done on EVERY regulator installation, BUT, I cannot guarantee that the PA gunsmiths did this, so, be prepared to do it.

The correct procedure is to make first a "pull ball" , and that is nothing more than a few rags tied together with a strong, long piece of twine. It needs to be able to sit UNDER the threads, but ABOVE the regulator you are trying to remove.

So, degas the gun, insert your pull-ball keeping the long twine out, then take the scotch-brite and remove ALL the burrs and hard edges on the air-tank's threads.

Once you have done it, clean the thread with some of the pellet tin sponges and some alcohol, run your finger around and make sure there are no sharp edges.

When you are done, pull the ball and all the little debris should be brought out by the ball.

Now, make sure that there are no flakes, nor debris behind and insert the extraction rod. WITHOUT bending the rod, pull the regulator out and adjust. The table in the manual is fairly acurate and it is made for the heaviest pellet logical for each of the power levels.

You can also read all the series on the Stormrider in my blog:

https://www.ctcustomairguns.com/hectors-airgun-blog/exploring-the-diana-stormrider-part-1-the-trigger-and-the-power-plant-in-017745-mms-cal 

https://www.ctcustomairguns.com/hectors-airgun-blog/exploring-the-diana-stormrider-part-2-the-performance-at-sub-600-fps 

https://www.ctcustomairguns.com/hectors-airgun-blog/exploring-the-diana-stormrider-part-3-the-mid-power-region-800-fps-and-above-in-0177-and-20-ft-lbs-022-under-real-world-conditions-at-the-2018-pyramyd-air-cup 

As well as Ken Wheelers's experiences:

https://www.ctcustomairguns.com/hectors-airgun-blog/ken-wheelers-adventure-with-the-diana-stormrider 

if you have any question, just post here or drop me a PM.

Keep well and shoot straight!

 

 

 

 

 

HM


   
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(@mtipton)
Texas
Joined: 5 years ago
Posts: 15
Topic starter  

Hector, thanks very much! Exactly the info that I hoped for. I will post an update.


   
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(@mtipton)
Texas
Joined: 5 years ago
Posts: 15
Topic starter  

Well, I got the regulator removed. The threads on the air chamber were in good shape. Basically the hard part is the force needed to extract the regulator.

But I seemed to have dug myself a hole. I made the new setting and pushed it back into the gun. However when I was “playing” with the set point I must have turned the screw too far in one direction or another and screwed up the regulator. When took shots over the chrony the fps started at about 900 and dropped steadily from there. I extracted the regulator and set it for a different value with pretty much the same results on the chrony. Have I busted it permanently or is there a way to reset the device.

 

Apparently I can order a new one from Altaros without waiting for them be in stock at PA.


   
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(@mtipton)
Texas
Joined: 5 years ago
Posts: 15
Topic starter  

I decided to try moving the adjustment screw one full turn. I tried clockwise and it would have been right against the installation rod. So I tried counterclockwise for 110 BAR. 

Success!

Roughly 28 shots ranging from 714 to 705 FPS. I think that 4 magazines on a fill is pretty satisfactory!


   
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(@hector_j_medina_g)
Maryland
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Joined: 7 years ago
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@mtipton I am happy that you are happy. At some point in time, you need to experiment with restricting the TP.

As you read in my Part 3 of the Stormrider series, by using 110 BAR and restricting the TP to 2.6 mm's we got 40 shots between 830 and 819 fps, so that would be almost 6 mags in a single fill (to 230 BAR's) with 10.3 grs. pellets.

Once you have optimized the Tp, you can install a floating hammer and increase further the efficiency.

Good job, a very promising first steps into the performance oriented gunsmithing world! Congrats!

 

 

 

 

 

HM


   
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(@mtipton)
Texas
Joined: 5 years ago
Posts: 15
Topic starter  

Hector,

I hadn’t realized that I left out an important piece of information. My Stormrider is a .22.

Both your writings and the Altaros info mention different sized transfer ports. Where are these obtained? Or is this a case of modifying the standard TP.

 

Thanks!


   
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(@hector_j_medina_g)
Maryland
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Ah! OK, that's good then. You do not tell us which pellets you are using, in Part III of the Stormrider series, I tuned a 0.22" cal for the Gunslynger using Baracuda's at 650 fps

Ken Wheeler used CrowMags in the tune of his 0.22" so I would also suggest reading his guest entry.

28 shots at 705-715 is very good but if thosw MV's are with 14.3 grs. pellets, then the total energy output is 448 ft-lbs.

Using Baracuda Mags at 650 fps gives you a total energy output of 790 ft-lbs

As you can read from Ken's entry, I can send you an underdrilled TP, and you can then drill it out in SMALL steps (numbered drills), and see how things go.

Drop me a PM if you are interested. If you are happy, then congrats, you're done!

😉

Keep well and shoot straight!

 

 

 

 

 

 

 

HM


   
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