REGULATED AND NON-REGULATED whats it mean?

[grobe1458]

Valve standoff ... not too sure what that refers to ?

We do use spacer sleeves or other means to gain volume between regulator output and valve. ( AKA: Plenum )
Bob came up with a very useful approximation of "Plenum" volume required being a maximum/optimum of 1cc plenum volume per Foot Pound of power your wishing AG to produce.

yes, plenum would equal that. I guess once you determine the volume needed, that's when you drill the the breather hole.
funny thing is watching all the videos on you tube most the guys with s510's were regulated and I assumed they all were (NOT) . on the bright side the bsa r10 mk2 is regulated. the s510 as it is is a very good gun and I could be happy with it in it's current state. I think I may focus on the mrod for now, ship out the rainstorm to Mr. Piatt and just keep collecting pcp's

[Motorhead]

In .177 cal ( 20 Ft Lb ) and .22 cal ( 35 Ft Lb ) regulator conversions we find sufficient plenum volume when we pull out the valves internal sleeve, open up the gauge manifold and increase flow threw valves  spring/poppet retention cap.

* The newest Huub regulators made as M-rod specific utilize a built in plenum that replaces the factory gauge manifold.
Venting is done via gauge hole already present in tube.

Looks like this 


These can be purchased from AGE .... see: http://www.gatewaytoairguns.org/GTA/index.php?topic=55400.msg529058#msg529058

[grobe1458]

I always strive for 1 cc of plenum volume for every FPE you want the gun to produce.... It's not a hard and fast rule, and you can get away with half that volume, but you will pay a price by having to increase the setpoint of the regulator to get back to the same power level.... This is why Motorhead said that regulators are best in the smaller calibers and for lower power, because you don't have to lose as much of the reservoir to the pleunum (volume downstream of the regulator, often provided by a "valve standoff", ie spacer between the regulator and valve).... I have several high powered, regulated, PCPs, but they have separate tanks and very large plenums.... Once so equipped, they are fabulous guns, but to do that you have to do things like reverse the tank, placing it below the original reservoir like this....



The upper rifle is a 2260 HPA, shooting 18 gr. JSBs at 960 fps (37 FPE), and gets over 40 shots from 13 CI of air regulated to 1600 psi.... The lower one is a 2560 HPA, shooting 25 gr. JSBs at 960 fpe (52 FPE), and gets over 32 shots from 17 CI of air regulated to 1800 psi.... Both rifles have the entire 2260 tube (65 cc) as the plenum.... They both have Lothar Walther barrels, custom repeater breeches, and Hawke 3-12 x 44 SF Scopes, and are set up for identical trajectories....

Bob

thanks, it's making sense, as for the larger calibers, I sold the .25 mrod to a friend and he really wants a regulator on it. it's getting about 22 accurate shots before pellet drop off. he prefers to leave it in my gun cabinet so it's still like I have a .25.*L*

thanks again for your informative knowledge, I'm beginning to see the light.

[grobe1458]

In .177 cal ( 20 Ft Lb ) and .22 cal ( 35 Ft Lb ) regulator conversions we find sufficient plenum volume when we pull out the valves internal sleeve, open up the gauge manifold and increase flow threw valves  spring/poppet retention cap.

* The newest Huub regulators made as M-rod specific utilize a built in plenum that replaces the factory gauge manifold.
Venting is done via gauge hole already present in tube.

Looks like this 


These can be purchased from AGE .... see: http://www.gatewaytoairguns.org/GTA/index.php?topic=55400.msg529058#msg529058

thanks, I'm sitting here with the biggest grin on my face

[1216bandit]

Can one just install the regulator and call it done or are there other things that need doing also.  Other than doing things that require machine work what other drop in low cost items would be suggested?  I have read about the lighter hammers and modified valves available but not quite sure how they complement the regulator, or if they really are needed.

[Blind Squirrel]

In .177 cal ( 20 Ft Lb ) and .22 cal ( 35 Ft Lb ) regulator conversions we find sufficient plenum volume when we pull out the valves internal sleeve, open up the gauge manifold and increase flow threw valves  spring/poppet retention cap.

[rsterne]

To optimize performance with a regulator, you need to at a minimum tune the gun by adjusting the preload on the hammer spring.... If the tune is radically different than the way the gun came from the factory, you may have to change the spring itself.... Further improvements in efficiency may be possible with changing the hammer weight or travel....

If you are trying to achieve a tune that the regulator is not really suitable for, you will obviously have to change other things to try and accomplish your goal....

Bob

[Tjr]

I had to stop reading. Way to complicated. Unregulated means you have a spring fighting against an ever decreasing amount of pressure, find your sweet spot and fill to the shot string you want.
Regulated just means you will only achieve a certain maxi pressure release per trigger squeeze, regardless of your reservoir pressure. Preference really depends upon the purpose of the gun  hinting or target.