B51 Regulator

[Skip in WV]

Has anyone put one in? Where did you get it? What pressure did you set it? What pellet did you use, what speed? Shot count?

[lillysdad621]

dont know if one is available, but they are seriously consistent with out. Mine shoots well but i replaced springs and transfer port. Mine now fills to 1400 psi and gives me 88 shots at 800 with 10.34 JSB within 15 fps+-. accurate enough to compete in HFT. they truly are diamonds in the rough.

[Skip in WV]

Where did you get the parts? And, what size transfer port and spring?

[lillysdad621]

The transfer port was clear poly hose (same diameter as the port). cut long enough to be compressed and give a perfect seal. The springs are from sears hardware 9take your springs out and then  find similar springs that are both stiffer or softer and mix and match until you reach desired speeds. Also the striker can be taken out and replaced with a allen bolt. then you can adjust without problems from the back of the bolt.

[Skip in WV]

Got the rifle from Big Ed. Airbus exporter says he doesn't have the regulators.

[rsterne]

I don't know how familiar you are with regulator in PCPs.... but since you only have a few posts I thought I might clue you in.... If you are looking for lots of shots at relatively low power.... or a nice flat shot string with close to stock shot count at moderate power.... then you may be able to achieve that with a regulator.... However, if you are looking at the high power end of the spectrum (for a B-51) you are likely to be disappointed.... Most aftermarket regulators are placed either right up against the valve, or very close to it.... That restricts the amount of volume the valve can draw on.... Since there is no way a regulator can open and top up the pressure DURING the shot, the air "on deck" is what you have to work with.... If that volume of air isn't 1/2 cc per FPE of power you are expecting, you will have to increase the regulator setpoint to compensate.... Even if that is possible, you will lose shot count.... Twice that (1 cc pre FPE) is better, and is what I try an achieve in any gun I am regulating.... That is VERY difficult to do efficiently with an internal regulator, because increasing the the volume downstream of the regulator means you have a smaller reservoir to draw from....

What I'm trying to say, is that whether or not you should fit a regulator depends on what your desired results are.... Low to moderate power OK.... High power, you will likely be disappointed.... and some regulators require you to drill the air tube, which means it is difficult to go back....

Bob

[Skip in WV]

Interesting. What I'm hoping to get eventually, without or with a regulator, is 30 shots or so in the 875 to 900fps range. I don't know enough about the rifle to get it. Any info is appreciated. Almost forgot I'm using CPH 10.5 pellets.

[lillysdad621]

Get a lighter hammer spring. cut it to fit behind the hammer and only giving the cap about 1/4 inch of tension. adjust the striker in all the way forward. fill it lightly (try 1300 psi first and then work your way up) if you overfill it you will lock up the valve. shoot it on the chrony (it should be like low to med 600s). then start backing the striker out to gain velocity. if you adjust the striker in more than 1/4 inch, dissasemble and shim the back of the spring, then unscrew the striker again and start again. eventually you'll hit that spot... remember to refill up 50 psi at the time. you'll know when you are getting to your max fill because it will shoot weakly... I like mine set up like this... low fill pressure, lots of shots. (even at 800s is a great squirrel getter out to 50 yards)

[Skip in WV]

Yes, I did. But, I haven't read all of it yet.

[renowntwo]

Mr. Skip are you new to pcp?  If so, before you try to tune the b50  you may want to invest in a way to fill the AR. PCP Tuning take a lot of air to get the best out of it. Do you have a chony of your own? If not  you will need one and also alot of cheap pellets.
When I first start with tuning the b50 i didn't have access to quick fill place which almost made me place it up for sale but I found a local paintball store that really made it easy. Then I was able pick up a tank and some other accessories.
I had the same ideal you have about the reg that AG export sells but I wanted power and after reading several post about the reg  I felt that it was not going to fit my needs.
I did email AG exporter asking did the sell a reg for the b50 and I was told that they don't have the reg 

[Skip in WV]

I've been at it for about 5 years. I have both a crony and a carbon fiber tank. I have a Steyrr LG110, and an Airwolf. The B51 is a winter project although it was my first PCP rifle. I've been thinking about selling the Steyr, and using the B51 as a backup FT rifle for the Airwolf. Surprisingly, I actually shoot better with the Airwolf

[GarthThomas]

In case you were still looking for the regulator, this is the only fellow I could find.
Audrius Rusys, pcpregulator@gmail
I think he wanted about $80.00 shipped, I haven't ordered one but I did contact him. It took a couple of weeks to get a reply.
There is a vid on u tube showing one of his being installed in an AA410 I think.

[Skip in WV]

Thanks. Got an email from him this morning

[el barba]

I have a .22 B51 with Adryus (the Lithuanian) regulator set to 100 BAR output. You've got contact details above. It gives me about 35-40 full power shots at about 800/ 850 fps from a 200 BAR fill with JSB Exact 15 plus grains. Valve seal has been made new in delrin with a little conical shape to it and the valve seat. Otherwise stock rifle parts. Amazing accuracy and plenty of gun for hunting suitable quarry!
But also have another one without regulator, everything factory stock, except valve seal reduced to 8,5 mm. diameter. It will deliver some 25 full power shots at 900/950 with the same pellet. And 1025/1050 with JSB RS 13 plus grains. Just for some more punch if needed!

[Skip in WV]

How does the regulator install? Is there something to assure the regulator is the correct distance front the valve? Do you have to drill into the sir tube?

[Skip in WV]

I haven't gotten it yet. I'll post when, or if, I get it finished. Soon would be nice though.