Leshiy 2nd Gen .20 Cal Sub 12ftlb Energy Tune
i’ve been doing a lot of testing and fine tuning between reg pressure ,hammer tension and valve tension and valve port restriction size to get the best consistency and shot count in Sub 12ftlb.
I’m quite happy where it’s at now
Gen2 Leshiy .20cal JSB 13.73 grain 50 shot string
250bar fill pressure down to 100bar.
Average 600.09 FPS 10.98 FTLB Energy
Spread: 9.80
Std Dev: 1.81
Across 50 shots
https://z57i.imgup.net/4thstring1e54c.jpg
https://c60i.imgup.net/4thstring2db8f.jpg
https://w34i.imgup.net/AveragePowbe3d.jpeg
:biggrinn:
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Viewing 12 replies - 1 through 12 (of 12 total)
A completely new regulator.
A new plenum with regulator or just an insert to existing insides?
The plenum is too large in the current design
Could you be less mysterious? What would it be?
Hi keyser soze , yes im aware there’s a kit being produced by Huma , or a smaller compact optimized sub 12 specific regulator atleast.
I think it’s probably in my best interests to leave my rifle as it is and enjoy it, as if i was to even manage to get a few shots extra with what i’ve got , then as soon as the new Reg or kit etc is out and i buy that then im sure everything will change anyway.
A permanent 12-foot pound solution is in the works. Hammer bounce is not an issue.
Hi Kris and keyser soze , im not sure whether or not it has hammer bounce? how would i check? as for Reg Setting well as i stated i think it’s set around 80 going by Wingmans calculations , although the power starts drastically dropping when rifle air pressure hits 100bar so in normal circumstances that would mean the Reg is about 100bar ? but also i have a brass collar air restricting insert fitted into the valve exit chamber, Ed supplied the last gen2 leshiy with these to keep them sub12 as the valve air exit port is quite large to enable a lot of air through quickly due to high power configuration and the intended use it was made for, Ed suggested opening the small exit hole in the restrictor to adjust and setup to better sub12 configuration, so i have opened the exit hole up a bit bigger , so i am using the restrictor to limit power and save air.
*See Pics Below*
https://m87i.imgup.net/111b485.jpg
https://b17i.imgup.net/112df0c.jpg
https://v47i.imgup.net/11357f1.jpg
i am aware of the stiffer/stronger hammer spring used in the gen2 and thats why i currently have it set up just 1 click from the very lowest hst setting possible and also i have fitted a spacer behind the valve spring to increase valve resistance as the resistance lowers with the lower Reg pressure settings
(I’m fully aware of the Hammer smashing the brass valve guide and mushrooming and jamming valve pin and rifle going bang and dumping all air , i discovered that the hard way) i am also aware some have filed a bit off the end of hammer to reduce risk of that and also some have fitted harder upgraded brass valve guide and thicker harder valve , though i have managed to not need to do that with the way i have mine set up
I am getting 50 tight consistent shots from 250Bar Fill down to 100Bar Averaging 600.09 FPS 10.98 FTLB Energy
with total Spread: 9.80 and Std Dev: 1.81
that is Across the whole 50 shots.
My aim is to get as many shots as possible but also consistent and tight string with as little variation as possible with power averaging 11ftlb as that is sufficient for my needs.
im not sure how im doing in regards to my aim , though i think the numbers look pretty good and others have also said so , but it’s just that question can it be made better or more efficient on air usage? all this tuning and setting up is new to me and i have started in the deep end,
any help info and tips are greatly appreciated
Many Thanks.
Don’t turn it down. The Leshiy is designed to shoot 30-foot pounds (give or take) with the 250 barrel. So the hammer spring was made with a higher bar setting in mind. If you drop the regulator much lower, you run the chance of bottoming the valve out and smashing the brass valve guide. You can turn it to 85 bars but if you go that low does not shoot the gun off the regulator. The Gen 2 has a different hammer shape that will make it harder for it to collide with the brass cup but at really low pressures it can cause a dent
11fpe is ~85-90bar, you should be able to go lower a bit with the reg. does it have a hammer bounce with low reg and low shotcount? why did you have to stay 100bar? .22 needs 80bar for 11fpe and decent shotcount. .177 is 90-95bar. you can go 10 lower i think.
I’m not exactly sure as i am using Ed’s Regulator and I’m going by Wingmans advice of every 30 degrees turn decreases roughly 10bar so i noted/marked the reg position at 12 oclock and turned to 5 oclock = 150′ Degrees , so approx 50bar lowered from 130bar so im thinking its around 80bar ?
i cant be precise for sure with no Reg Tester To Enable me to check it.
Does anyone know the safest/lowest i can go with Ed’s reg ? i mean i don’t want to turn it down too much and something breaks or goes bang
i have the urge to try turning it down a little more and see if shot count increases a little without power drop
i’ve still yet to fit a short valve and plenum to test and I’m sure that will increase shot count a little
i have fitted the brass port restrictor but made the exit hole bigger , to limit wasted airflow.
I’m also using a spacer behind valve spring to increase pressure and my HST is 1 click from very lowest setting
Looks good. What was the Regulator pressure set to ?
Viewing 12 replies - 1 through 12 (of 12 total)
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Yesterday I fitted huma-air reg in my stock sub 12ftlb Leshiy gen2 (250mm barrel, cal .22, JSB Exact Jumbo 1,03g/15,89gr) and here is what I’ve got out of it:
No. V [m/s] Ek [J]
1 200,80 20,77 I adjusted HST to lower pellet speed
2 181,80 17,02 I adjusted HST to lower pellet speed
3 174,90 15,75 got it right this time.
4 175,90 15,93
5 174,40 15,66
6 176,70 16,08
7 176,40 16,03
8 173,70 15,54
9 174,40 15,66
10 174,70 15,72
11 175,60 15,88
12 175,00 15,77
13 176,60 16,06
14 178,20 16,35
15 175,30 15,83
16 175,80 15,92
17 174,30 15,65
18 175,00 15,77
19 178,10 16,34
20 177,50 16,23
21 177,30 16,19
22 176,20 15,99
23 177,80 16,28
24 177,80 16,28
25 177,30 16,19
26 175,60 15,88
27 176,20 15,99
28 178,10 16,34
29 175,20 15,81
30 177,60 16,24
31 177,00 16,13
32 175,50 15,86
33 177,90 16,30
34 178,30 16,37
35 177,80 16,28
36 176,90 16,12
37 177,50 16,23
38 177,30 16,19
39 177,00 16,13
40 176,70 16,08
41 177,30 16,19
42 176,40 16,03
43 177,20 16,17
44 175,50 15,86
45 176,90 16,12
46 177,20 16,17
47 177,60 16,24
48 176,20 15,99
49 175,40 15,84
50 176,40 16,03
51 177,30 16,19
52 177,20 16,17
53 177,00 16,13
54 178,30 16,37
55 177,50 16,23
56 180,20 16,72 off the reg
57 182,30 17,12 off the reg
58 183,70 17,38 off the reg
Stats, rejected first two shots and last three off the reg:
Vm 176,55
Vmin 173,7
Vmax 178,3
dV 4,6 !
sV 1,19 !
Ekm 16,05J
Start pressure: ~250 bar
End pressure: ~90 bar
I adjusted a velocity in first 2 shots lowering HST by -2 or -3 clicks to achieve ~176 m/s.
With stock reg set to 130 bar i had 34 shots from 250 bar to 120~130 bar.
Now shot count raised by 63% from 34 to ~55/56 !!!
It seams I bought myself ~22 shots per fill. I am very pleased of such result.