Regulated Daystate Air Ranger Tactical/ Need Help!!!
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hmm 160 sounds a bit high in my mind, most guns that are supposed to shot .25 at around 850-900 fps are set at 150 bar.
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Yes I agree but when I have the reg set any lower, it drops my velocity down to approx. 830fps with 25.4g pellets. I don't understand how my old EdGun Matador regulator was set at 130bar from the factory and I could easily sling the JSB Exact King 25.4 way over 900fps but I am at a loss for why I can't balance the shot count and velocity with the Altaros regulator. I think I may have to try different hammer springs or maybe a different bushing because the Daystate Air Ranger.25cal. 50fpe model has an entirely different hammer than the 30fpe Daystate models which house a Harper Slingshot hammer. Also the Air Rangers come with different size bushings that set on the hammer spring to give the hammer a little extra ooomph depending on the caliber and fpe.
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It could be that with the regulator, you don't have enough air plenum volume to push the pellet at the required velocity. That may be the velocity problem but doesn't explain the shot count issue... What pressure are you charging the bottle to? 250 bar?
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Did you change the port size?
I agree that 160 bar is too high, and 130 is closer to reality. In order to get there however, you need to resize the port which that might require changes in the valving. And I suspect you're getting a lot of hammer bounce too.
You might want to go over to GYA ar the Airgun Guild, and pose this to Bob Sterne, and see what he says.
I agree that 160 bar is too high, and 130 is closer to reality. In order to get there however, you need to resize the port which that might require changes in the valving. And I suspect you're getting a lot of hammer bounce too.
You might want to go over to GYA ar the Airgun Guild, and pose this to Bob Sterne, and see what he says.
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Im not familiar with the daystate hammer, but try setting your reg at 130-135 and bringing your FPS up with the hammer spring. Sylvan
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Centercut called it IMO.
The entire bottle was your plenum , now just the tiny portion between reg & rifle is the plenum.
Cut that air space in half and you'll need to run an even higher set point, make it a bit longer and then youy can lower the reg psi.\
John
The entire bottle was your plenum , now just the tiny portion between reg & rifle is the plenum.
Cut that air space in half and you'll need to run an even higher set point, make it a bit longer and then youy can lower the reg psi.\
John
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Maybe a dumb question, but does the Harper patent and the regulator play well together so to speak?
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I figured a bigger transfer port could be to blame but I also believe the plenum on the reg is undersized for a .25cal. Also to be clear my gun is using the Daystate high power hammer, and not the " Harper Patent Slingshot Hammer". If it turns out that a bigger plenum is indeed needed, then I'll be emailing Altaros and asking if they could machine me a plenum to thread directly onto those M18x1 threads that the bottle neck and the male threads coming directly off the front of the breech assembly use.
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Sounds like a plan. You'd want the plenum between the regulator and the breech assembly. That will give more pressurized volume to shoot the pellet at higher speeds. The ones that the expert tuners like Charlie Freer use on the Crickets is about 1.5 to 2 inches long. It'll make your gun look odd...
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Well you could make a black Delrin or Aluminum shroud to cover the plenum tube and regulator, that wouldn't look bad if it fit right. If going to that trouble I'd also open up the transfer port a mm or two. Should easily be able to get well over 900 fps with 25 gr and 825 to 830 with the heavies. Like some guys have said for tuning after the upgrade, set regulator at 135 or so, then adjust hammer spring until maxed out or where you want to be. Then next step go up in reg pressure with hammer spring mid way tensioned, and start process over again.
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I once had a Air Ranger in 25 cal set up with that reg
I suggest you use a spring from a 35 foot pound gun the
spring will be 2 an 3/8s long do not use the white spacer
you will need to use a transfer port that is at least .185" .
Set reg pressure at least 135 bar the gun on a full fill of
3,600 psi should get about 75-85 shots and shooting in the
neighbor hood of 845 fps thats right at 40 foot pounds . All
that is left is a lot of tuning and testing it took me weeks to
get my gun where I like it . Good luck with your endeavor . Dale
If your using the stock spring now make sure the white spacer
is not being used pull it out .
I suggest you use a spring from a 35 foot pound gun the
spring will be 2 an 3/8s long do not use the white spacer
you will need to use a transfer port that is at least .185" .
Set reg pressure at least 135 bar the gun on a full fill of
3,600 psi should get about 75-85 shots and shooting in the
neighbor hood of 845 fps thats right at 40 foot pounds . All
that is left is a lot of tuning and testing it took me weeks to
get my gun where I like it . Good luck with your endeavor . Dale
If your using the stock spring now make sure the white spacer
is not being used pull it out .
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Personally I don't think these are set up to perform well with a reg. I have an air ranger .25 with the same set up but no reg and I find it to be pretty damn efficient overall with the harper hammer.
Regards,
DT
Regards,
DT
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In this link are my findings about regulating a AR, summary, your AR is wasting air big time with the way too heavy hammer 
http://www.airgunnation.com/topic/altaros-regulator-2/#post-93070
http://www.airgunnation.com/topic/altaros-regulator-2/#post-93070
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Thank you guys for this info because a lot of what I suspected has been mentioned by you guys. I took out the Air Ranger Tactical .25 today along with my FX Impact.177 and had a good day of 100yd shooting. I shot the Ranger without the reg and I can't complain about performance because it's just such an accurate hard hitting beast.
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In regards to the power, I agree the plenum is too small. For the low shot count, the air entirely dumps down to almost no pressure then takes too long to refill. Your current valve spring is too weak to close the valve quickly. So, the valve stays open to long and dumps wasted air before the plenum pressure builds back up for the valve closing. With after market regulated rifles this can be a problem. Look at Gregor's Youtube video with his super modified Hatsan BT65. He explains this in good detail. When the rifle is regulated, he needs to place a stronger valve spring to shut the door quicker to avoid wastep air.
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Thanks for the advice as this is an ongoing battle but I feel I’m on the right track. If I could at least get the gun to shoot the JSB Exact King 25.34g at approx. 880-900fps than I would be happy, with a decent shot count to of course. I love the Air Ranger as it is a rugged dependable beast of a hunting rig.
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