on the s400 whats the correct way to turn the power up or down ,looking to 18.13 jsb to around 20 ft/lb and planning on getting a regulator but not sure which one and results expected once done,,,,,,
air arms s400 fac
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Hmm. It's not any easy thing. What is it shooting now? I take it this doesn't have a power wheel?
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Send it to Scott Schneider at Motorhead Airgun Tuning Services. He put a HUMA in my S410 and the results were incredible....
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I’m installing an Altros FAC regulator in my S510TDR FAC today I plan on doing a video of the installation and testing. I sure hope it works 
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I’m installing an Altros FAC regulator in my S510TDR FAC today I plan on doing a video of the installation and testing. I sure hope it works
sounds great finger crossed for ya
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Without a transfer port adjuster a regulater and hammer tune are about all you can do without drilling out the transfer port. This is because AA doesn't have an adjustable hammer with little room for shimming. So you can play around with different strength springs and hammer weights untill you've achieved your desired results. A tip will be to start with your regulator at 120bar. Also be very gentle with your assembly/disassembly as the screws are steel going into aluminum and can strip or cross thread very easy.
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I’m installing an Altros FAC regulator in my S510TDR FAC today I plan on doing a video of the installation and testing. I sure hope it works
sounds great finger crossed for ya
The surgery was a success I’ll be posting a separate thread regarding the installation later but thought you guys would like to know how things went. Prior to the install of the Altaros regulator I was only getting 15 shots before pellets went haywire. Here are my chronograph results now. I was able to double my shot count to 30 shots on the regulator.
Created: 12/05/19 07:52 PM
Description: Air Arms MKIII TX200
Notes 1: JSB Diablo pellet 10.34gr
Notes 2:
Distance to Chrono(FT): 1.00
Ballistic Coefficient: 0.021
Bullet Weight(gr): 10.34
Temp: 54 °F
BP: 1013.59 inHg
Altitude: 4400.00
# FPS FT-LBS PF
30 857 16.87 8.86
29 862 17.06 8.91
28 855 16.79 8.84
27 861 17.02 8.90
26 861 17.02 8.90
25 859 16.94 8.88
24 862 17.06 8.91
23 859 16.94 8.88
22 861 17.02 8.90
21 864 17.14 8.93
20 861 17.02 8.90
19 858 16.90 8.87
18 865 17.18 8.94
17 866 17.22 8.95
16 865 17.18 8.94
15 867 17.26 8.96
14 866 17.22 8.95
13 ERROR 2
12 ERROR 2
11 864 17.14 8.93
10 866 17.22 8.95
9 870 17.38 9.00
8 868 17.30 8.98
7 870 17.38 9.00
6 872 17.46 9.02
5 869 17.34 8.99
4 867 17.26 8.96
3 869 17.34 8.99
2 869 17.34 8.99
1 865 17.18 8.94
Average: 864.2 FPS
SD: 4.4 FPS
Min: 855 FPS
Max: 872 FPS
Spread: 17 FPS
Shot/sec: 0.0
True MV: 867 FPS
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I’m installing an Altros FAC regulator in my S510TDR FAC today I plan on doing a video of the installation and testing. I sure hope it works
sounds great finger crossed for ya
The surgery was a success I’ll be posting a separate thread regarding the installation later but thought you guys would like to know how things went. Prior to the install of the Altaros regulator I was only getting 15 shots before pellets went haywire. Here are my chronograph results now. I was able to double my shot count to 30 shots on the regulator.
Created: 12/05/19 07:52 PM
Description: Air Arms MKIII TX200
Notes 1: JSB Diablo pellet 10.34gr
Notes 2:
Distance to Chrono(FT): 1.00
Ballistic Coefficient: 0.021
Bullet Weight(gr): 10.34
Temp: 54 °F
BP: 1013.59 inHg
Altitude: 4400.00
# FPS FT-LBS PF
30 857 16.87 8.86
29 862 17.06 8.91
28 855 16.79 8.84
27 861 17.02 8.90
26 861 17.02 8.90
25 859 16.94 8.88
24 862 17.06 8.91
23 859 16.94 8.88
22 861 17.02 8.90
21 864 17.14 8.93
20 861 17.02 8.90
19 858 16.90 8.87
18 865 17.18 8.94
17 866 17.22 8.95
16 865 17.18 8.94
15 867 17.26 8.96
14 866 17.22 8.95
13 ERROR 2
12 ERROR 2
11 864 17.14 8.93
10 866 17.22 8.95
9 870 17.38 9.00
8 868 17.30 8.98
7 870 17.38 9.00
6 872 17.46 9.02
5 869 17.34 8.99
4 867 17.26 8.96
3 869 17.34 8.99
2 869 17.34 8.99
1 865 17.18 8.94
Average: 864.2 FPS
SD: 4.4 FPS
Min: 855 FPS
Max: 872 FPS
Spread: 17 FPS
Shot/sec: 0.0
True MV: 867 FPS
def seems worth while doing it then, no hole needed
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Yes it’s definitely worth the time and money to do the regulator installation on an unregulated S510 Or 410. I found the JSB .177 10.34gr pellets like to fly at the mid 800’s FPS at any other speed fo my S510 they seemed to not group well. Unfortunately you cannot precisely adjust the velocity using the transfer port adjuster, and if you did you’d just be wasting air.
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