hammer spring versus valve stem versus rgulator adjustment
what is the most reliable method to increase my velocity?
Now i am on 254 m/s
my hammer spring is at the shortest length
now in order to increase the velocity more .
may i increase the regulator pressure or decrease the valve stem spring length?
All Replies
😆 i am not Norwegian
i am egyptian i am really satisfied with my results because here in egypt we don’t have 18 grain pellets ,you helped me alot, i admire your effort to repair my cricket
my only problem that i am an anaesthetist always on call 🙂 so dont have enough time to read all your fantastic forums that helped me alot
but really you r my only reference for my love cricket . here in egypt we have only 2 crickets
again thank you
no language barrier at all 🙂
I see Doctor Tejani, okay then Egyptian. 😆
I understand my wife is a Surgical Oncologist and she is always busy !
I use to collect beautiful silver Egyptian pound a long time ago.
I hope you will continue to post here.
I would like to see your Cricket, post some pictures someday when you have time, any kind target or hunting.
~ GKU
great old egyptian coins , you have something that we don’t have here 😛 ay
of course i will send here again soon , pictures of my cricket and my hunting .
happy valentines day
😆 i am not Norwegian
i am egyptian i am really satisfied with my results because here in egypt we don’t have 18 grain pellets ,you helped me alot, i admire your effort to repair my cricket
my only problem that i am an anaesthetist always on call 🙂 so dont have enough time to read all your fantastic forums that helped me alot
but really you r my only reference for my love cricket . here in egypt we have only 2 crickets
again thank you
no language barrier at all 🙂
I see Doctor Tejani, okay then Egyptian. 😆
I understand my wife is a Surgical Oncologist and she is always busy !
I use to collect beautiful silver Egyptian pound a long time ago.
I hope you will continue to post here.
I would like to see your Cricket, post some pictures someday when you have time, any kind target or hunting.
~ GKU
This is great info for a noobie! Thanks! I’ve got a regulator tester coming in from Earnest’s machinist buddy and I think I understand pretty well how to adjust the regulator, and I understand how to adjust the hammer spring, but how do you know where to set the valve spring tension? How do you know what is 1/2 and where do you start. I know Earnest uses a weaker spring to give him more room to adjust it, but I haven’t been able to wrap my head around how to tell what the right adjustment is for the valve spring tension.
Thanks again for all the great info.
Chalie
Note that the above method of tuning doesn’t require one to have a reg tester but you do need a chrono and uses all OEM parts, except for a HST.
For 22 cal the valve retainer can be set between 1/2 to 1 rotation or even 2 after it touches the value.
To may knowledge tuning between 1/2 -3/4 rotation would be better maybe for a higher speed setting.
Tuning it towards 3/4 – 1 rotation is better for consistency with less hammer bounce.
There is no right or wrong just how you’d like to custom tune and set up your gun.
Also IMHO:
My advice before thinking of tinkering with the insides.
The only thing I did when my Cricket was new was to clean it’s barrel very VEry wEll, adjusted trigger and the HST for max shot count.
And I shot the living hEll OuT of it for at least 800-1000 pellets fire to let everything break in.
In the time spent I chrony and tested JSB 18g and 16g and some H&N also.
Found the pellet of choice was JSB 18g and found it to be very accurate at 880 fps.
All the above took about 10 mouth or so, before going in to do the tune in mention a month ago.
~ GKU
Hey guys I think you miss read tejani posts he wrote the below,
now my reg at 110 bar the valve 2 turns from contact
i can reach 290 m/s with hst with using 15 grain pellets 0.22 caliber
my reg from base to top is 53.4 mlm
I don’t think he followed my post instructions exactly ?
But he might be satisfied with what he ended up with using 15g pellets.
Because he didn’t take the measurement of his regulator before disassembly to change the O-rings out.
My posts to him was intended to help him get back up and running.
Not sure how much or if he understands and speaks English well, I think he’s Norwegian ?
~ GKU
😆 i am not Norwegian
i am egyptian i am really satisfied with my results because here in egypt we don’t have 18 grain pellets ,you helped me alot, i admire your effort to repair my cricket
my only problem that i am an anaesthetist always on call 🙂 so dont have enough time to read all your fantastic forums that helped me alot
but really you r my only reference for my love cricket . here in egypt we have only 2 crickets
again thank you
no language barrier at all 🙂
The reason why I ask is that I notice that on 4 Cricket 22 cals including mines if the HST is all the way out or all the way in, it doesn’t give good chrony statistics. This is with a re-tuning of the regulator to compensate for the new HST settings to give me 880 fps with JSB 18g.
It seems like it gives good chrony stats from 1/4 in to no more than about 1/2 way in from fully compressed.
So I tune backwards knowing this and set regulator and valve spring according to the HST setting that gives the best chrony stats.
Because of the fact that all Crickets (hammer, valve stem and regulator) spring tensions are somewhat different within each one.
So I set Hammer Spring first then Value Spring second and then set/adjust regulator to match last.
The results are that the regulator ends up between 120-130 bars, but the HS and VS are pretty much the same setting.
I think that is why KalibrGun set the regulator so high and crank up the HS, it’s so they don’t need to custom tune every gun.
All my post are IMO.
I don’t doubt that all the above may have been already posted, but it seem sometime it’s better to try it myself then to try and search/read through the TONS of posts here on TAG.
~ ATB ~ GKU
Greg,
This is great info for a noobie! Thanks! I’ve got a regulator tester coming in from Earnest’s machinist buddy and I think I understand pretty well how to adjust the regulator, and I understand how to adjust the hammer spring, but how do you know where to set the valve spring tension? How do you know what is 1/2 and where do you start. I know Earnest uses a weaker spring to give him more room to adjust it, but I haven’t been able to wrap my head around how to tell what the right adjustment is for the valve spring tension.
Thanks again for all the great info.
Chalie
Okay thanks Jan sound like yours is about 1/2 way in and giving very good chrony stats !
The reason why I ask is that I notice that on 4 Cricket 22 cals including mines if the HST is all the way out or all the way in, it doesn’t give good chrony statistics. This is with a re-tuning of the regulator to compensate for the new HST settings to give me 880 fps with JSB 18g.
It seems like it gives good chrony stats from 1/4 in to no more than about 1/2 way in from fully compressed.
So I tune backwards knowing this and set regulator and valve spring according to the HST setting that gives the best chrony stats.
Because of the fact that all Crickets (hammer, valve stem and regulator) spring tensions are somewhat different within each one.
So I set Hammer Spring first then Value Spring second and then set/adjust regulator to match last.
The results are that the regulator ends up between 120-130 bars, but the HS and VS are pretty much the same setting.
I think that is why KalibrGun set the regulator so high and crank up the HS, it’s so they don’t need to custom tune every gun.
All my post are IMO.
I don’t doubt that all the above may have been already posted, but it seem sometime it’s better to try it myself then to try and search/read through the TONS of posts here on TAG.
~ ATB ~ GKU
Hey Greg, I would like to tell you that but I have HST knob from Steve slightly adapted. I did a sinkage 5.0 mm for spring in the knob. So now I have 8 turns I got 885 fps.
Hi Jan,
I would like to know your HST settings on your Cricket 22 cal.
HST (hammer spring tension), how many turns CW to get your 889fps/271mps velocity using JSB 18g ?
—————————————————————————————————
My regulator is at 125 bar.
Valve retainer at 3/4 turn after contact.
HST 3.5 turn CW from all the way out, 880 fps / 268.2 mps with JSB 18g.
~ Thanks ~ GKU
I think there is a language barrier because post from Greg (GKU) is describes very well. 😉
.
Hey guys I think you miss read tejani posts he wrote the below,
now my reg at 110 bar the valve 2 turns from contact
i can reach 290 m/s with hst with using 15 grain pellets 0.22 caliber
my reg from base to top is 53.4 mlm
I don’t think he followed my post instructions exactly ?
But he might be satisfied with what he ended up with using 15g pellets.
Because he didn’t take the measurement of his regulator before disassembly to change the O-rings out.
My posts to him was intended to help him get back up and running.
Not sure how much or if he understands and speaks English well, I think he’s Norwegian ?
~ GKU
Nice post Greg. I can’t get my cricket to shoot 890-900 with 110 bar. Its set to 130 bar for 905 fps right now
Sent from my Z10 using Tapatalk
Today I shooted in my backyard and I have chrony with me I was curious how many fps/mps I could get in 110bar pressure. When I got 110bar my power was 264mps/866fps with 18grain/1,175gram pellets. It is 277mps/909fps. So I can´t imagine how cricket cal.22 could get 950fps with 110bar 😯
If yes it must be very very air efficiency. I want to know how to do it on my too.
and I will be looking to get 900 fps in my .25 cricket at the lowest reg pressure also and can basically do any mod needed. What will the basic numbers need to be on my rifle to get me close?
I’m not a big fan of porting out the transfer … . . yet.
You’d might want to consider a ST barrel instead to get more fps, but not all that sure what a lower fill pressure will do @ 900 fps on the Chrony stats ?
~ GKU
lol i was not very discriptive in my post sorry. i meant regulated pressure and i am just asking what the best set up would be to get 900 fps and what the lowest regulated pressure could be for a .25 jsb. at 900 fps.
i am using 15 grain pellette
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This is great info for a noobie! Thanks! I’ve got a regulator tester coming in from Earnest’s machinist buddy and I think I understand pretty well how to adjust the regulator, and I understand how to adjust the hammer spring, but how do you know where to set the valve spring tension? How do you know what is 1/2 and where do you start. I know Earnest uses a weaker spring to give him more room to adjust it, but I haven’t been able to wrap my head around how to tell what the right adjustment is for the valve spring tension.
Thanks again for all the great info.
Chalie
Also IMHO:
My advice before thinking of tinkering with the insides.
The only thing I did when my Cricket was new was to clean it’s barrel very VEry wEll, adjusted trigger and the HST for max shot count.
And I shot the living hEll OuT of it for at least 800-1000 pellets fire to let everything break in.
In the time spent I chrony and tested JSB 18g and 16g and some H&N also.
Found the pellet of choice was JSB 18g and found it to be very accurate at 880 fps.
All the above took about 10 mouth or so, before going in to do the tune in mention a month ago.
~ GKU
Absolutely agree 100% with this. That’s what I did with my .25 and after about 4 large in’s of pellets, I started to lose accuracy… cleaned the barrel and it was right back to tack driving… When I hooked up my video camera to the scope, before I cleaned, I discovered my accuracy had gone south because of pellet spiraling… after the clean up, I got perfectly stable pellet flight. The velocity didn’t change appreciably, just accuracy suffered. With my .22, so far I an VERY impressed with its accuracy right out of the box. I’ve tinkered with it a little, but no tune yet. I’ve got a HS adjuster/spring coming from Earnest. Once I get a thousand or so shots thru it, I’ll play with it on the bench. I took out a couple turtles this afternoon at 90 yards with it, so I doubt it will need much. The other thing I’ve noticed with it is that if I keep the pellet speed below 900 fps the 18 grain JSP’s fly very stable out to 100 yards. It sure is fun to shoot!