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Leshiy Regulator Adjustment

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Viewing 12 posts - 31 through 42 (of 42 total)
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  • #267700

    Excellent! Thank you Sir.


    BTW, anyone interested in a spare Leshiy reg?


    I am not an expert by any means but is there a reason why the Huma plenum is so large, couldn’t it get away with being half the size in length, therefore enabling more air to be put into the cylinder ?

    quote cybernet69:

    I am not an expert by any means but is there a reason why the Huma plenum is so large, couldn’t it get away with being half the size in length, therefore enabling more air to be put into the cylinder ?

    This one has been optimized for high power in .25 cal, but you can get huma with small plenum which is still delivering up to 22fpe and with a volume restrictor it is awesome for 12 fpe. Here small plenum version vs Ed’s full power version compared, black tube on top is a volume restrictor.


    I am really liking all that can be done with this gun. With these regs. I could go from indoor bad weather gun to hunting gun in short order.
    Very sweet indeed

    quote keithd:

    I am really liking all that can be done with this gun. With these regs.

    And that’s why it’d be the LAST airgun I’d ever sell… it’s a gem! Also it’s so easy to change barrels for long, short, and also any calibers including not just .30 but also insane .375 cal. (!) or polygonal .177 barrels available at Airgun Heaven. It’s such an easy gun to work with. Fun, pure fun!


    I am totally new to this regulator adjustment thing. Given a wanted muzzle energy, Is there any systemetic method to find out the optimal setting of the regulator and hammer spring when there is no means to measure the regulator output pressure ? Thanks in advance.


    Read this carefully

    If you want specific energy:
    1. set the reg pressure, check max velocity, set velocity max -10 FPS
    2. Check if it is what you wanted (energy/ velocity)
    If higher then decrease reg pressure and go to step 1.
    If lower than increase reg pressure and go to step 1.

    Tuners- correct me if I am wrong


    Thanks a lot Leon83 ! Very useful information .


    Finally I’m back from vacation and I’m just cooking an article about why you might consider a pressure tester for your reg, HUMA in my case. Yeah, it helps with proper setup.

    Especially if you (like me) decide to tinker with your reg or clean it due to leaking.


    OK, finally found some time to finish this. Forgive me all typos, got just iPad today :geekn:

    Let’s start from the basics – what is the regulator pressure tester? I know most of you know but maybe not everyone. It’s a device, which can measure the actual reduced pressure behind the regulator, so pressure which is in the plenum during shot cycle. And for tuning a PCP – this info is just crucial. Of course most people don’t care and just shoot what they got (and I was doing that for years) but if the access to regulator is easy (and in my EdGuns it is super easy) why not to play a bit and get the most of it?

    As you could have noticed I’ve really experimented recently a lot with Huma products in my Matador R5 and Leshiy. In total I was playing with 3 regulators and 3 different plenum setups. For a start – the pressure scale on a brand new Huma regulator is quite accurate. The problem is that constant tinkering with regulator and going too much back and forth with adjustment screw can get pressure scale misaligned with actual regulated pressure. Also when disassembling airgun many times it might happen that a tiny piece of dirt goes where it shouldn’t go and… regulator starts to leak. So the only way to make it working again is strip-down, full cleaning and re-lubing. And putting back together again. The problem is – your regulator won’t be aligned with pressure scale anymore. And you can be sure about it.

    And that’s when you need a pressure tester… and that’s when and why I got mine in the end. Of course there are more than just one solution available (some also custom built) but since my airguns run on Huma… well, the logical choice for me was Huma (of course). The good news is – whatever your airgun model is, and whatever Huma reg / plenum combo you use, you just need ONE tester to check all of your units. The tester seals on the front and back of the regulator, so it doesn’t matter what’s the diameter of your air cylinder – it will work.

    What’s the procedure? OK, let’s assume I want to set 110 bar on my regulator. So I just need to drop my reg into to the tester, screw the unit together, attach your scuba bottle and pressurize the regulator for an instant read-out on the big (and precise) manometer. In my case after regulator reassembly I had actual regulated pressure of 135 bar when my scale was set on 110! That’s why I had power peak below 130 bar and well before my intended 110 bar. It’s none’s fault, that happens when you tinker too much with regulator.

    Of course after the readout you need to depressurize the unit on both ends and just open, make a correction on a screw and test again until it’s exactly where you want it. Without tester – it’s a guessing game. With tester – it’s not a slightest problem. Of course I checked my regulator in R5 too and this one was very accurate (just 3bar off the scale, which is not noticeable in real world). But since my professional background is engineering I adjusted it anyway 🙂

    Build quality of that unit is very very good. CNC machined in a heavy billet of brass – to say it’s overbuilt would be understatement – it’s built like a TANK! But that’s what you want when dealing with pressure of 300 bar or more. The actual pressure gauge is a precision unit (Flowfit), which is widely distributed in Europe through UK dealer. So it’s a reliable measuring unit.

    And last but not least… it costs 105 EUR at this moment. I’d say it’s easily justified price for what you get and for the benefits it can bring to your shooting (both air consumption per shot and shot to shot repeatability). Actually it’s equivalent of about 8 tins of JSB Exact… and what is 8 tins, lol! So if you’re serious about tinkering with your airguns, and if you own more than one Huma regulator, I’d say: it’s a very good investment, which lets you keep your PCP’s under control for many many many years. For just 8 tins of JSB. And since Huma offers upgrades for almost all major airgun manufacturers, it will work also when you decide to switch a brand or model of your airgun. Plus you should be able to sell it quite easily, even here on the forum, if you don’t need it anymore for any reason.

    Happy shooting!


    Nice review!! Definitely a must to have tool. But it’s seems that only works with Huma regulators.

Viewing 12 posts - 31 through 42 (of 42 total)
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