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Thread: Air Arms S410 power upgrade?

  1. #1
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    Default Air Arms S410 power upgrade?

    Anyone out there know how to increase the power of the S410? I have turned the tuning screw but barely achieve 12.6 ft/lbs. There are a number of airgunsmiths in the UK who are willing to do this work but one requires an FAC certificate of course.

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    you need to adjust the power pot inside the air cylinder...not as simple as it sounds...
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    Have you opened the screw on the right hand side of your rifle completely? I had a S400 that shot more than 900Ft/sec with 8.4g pellets. That should be a bit above 12.6Ft/lb, although that is more than enough,in my opinion for PC and FT.
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    that would be 15ft\lbs

    most S400 rifles will only get to about 815 fps by acting on that venturi screw...to get any more power you need to act on the firing pot.
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    Guido, for the ignorant among us (of which I am one), what is the “pot” that everyone refers? I know (not from personal experience mind you) that pot makes you high, I would assume that speed makes you fast?!!

    I have just consulted the s400 manual again and see know referral to a “pot”?

    Please be so kind as to explain

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    hehe...the pot is actually the valve spring adjustment [p\n S360] inside the main cylinder ...do not attempt unless you know what you are doing!!
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    Up to what power can you get out of a S 400 ? And how many good shots do you get then ? Wouldn't it just be better to buy one of those new S 400 FAC's they are ajustable so you can change the power ?

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    Oh its one of those disinformation catch phrases, although all this mentioning of "pot" to improve your rifles power mite get the "anti's" in a froth!!

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    problem with the S400ERB with adjustable power is that the power wheel has no detents so the settings are not repeatable unless you only shoot on max or min power.

    Anywhere in between is a wild guess..
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    you can also adjust the power much more easily by putting a spacer in near the striker or buy a stronger spring, i think jason has been able to get it up to 900ft/s with 10.5 grain pellets

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    There is an Air rifle macanic form Kroonstad that claims he can tune a S400 up to 45ft/lb by changing the spring of the pot. I think he smokes the stuff

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    with what pellets?
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    I doubt that he will get 45 ft/lb from the std AA4XX. The port through which the air travels from cylinder to barrel is not large enough for the amount of air required.

    Adjusting the Pot can be quite tricky if you do not know what you are doing. There is also a limit to the amount that the pot can be adjusted.

    Air consumption would also increase thus reducing the no of good shots fired.

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    It might even blow up in your face.
    Take note! A man's being is not judged by the size of his possessions.

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    Thank you all for the interesting replies. I know that more power is probably not really necessary but I was a bit disappointed when my S410 was barely eclipsing an old BSA Meteor, velocity wise. I would like to be able to fire heavier PC pellets (e.g. 10.4gr) at velocities in the 800-850fps range.

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