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PostPosted: Thu Nov 26, 2020 9:42 pm 
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Joined: Wed Nov 25, 2020 9:47 pm
Posts: 6
I just bought a huma air regulator for my KRAL Arms Puncher Mega Marine .25 the regulator can be set with a pressure of 170 bars but my gun is a canadian tuned at 485 fps, if i add the pressure up over 120 bars on the reg will i need to increase the size of the transfer ports? , will i get more power and consistency just by tuning the regulator? does any one know how to tune this gun, there is not a lot of info


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PostPosted: Fri Nov 27, 2020 10:07 am 
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Location: Caronport, Saskatchewan
I'd start by checking with the chrony unregulated to see at what pressure the velocity starts to drop. Then set your regulator at that pressure. Modifying without ending up with too much velocity can be pretty tricky. I'd drill out as little as possible. It doesn't take much change in port sizes to make a huge difference, so it's always a bit risky.


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PostPosted: Sun Nov 29, 2020 12:05 pm 
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Joined: Tue Nov 01, 2016 5:59 pm
Posts: 151
Location: ,Ontario
There are some good videos on youtube about air regulators.This is a good channel to start with.https://www.youtube.com/channel/UCxM7qY ... 96haUX7LHA .If you are already looking for a gunsmith for help with another project this might be best left to them too.The videos state that sub 500fps guns can be the hardest to tune.I found the videos very informative.Good luck.


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PostPosted: Sun Nov 29, 2020 4:06 pm 
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Joined: Mon Aug 08, 2016 7:23 am
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Location: Somewheres near the Atlantic
Sid66 wrote:
The videos state that sub 500fps guns can be the hardest to tune.I found the videos very informative.Good luck.


Yeah I noticed that with tuning one of my PCP. I could get a nice flat string if it was slightly higher FPS, but sub 500 FPS, it would be all over the place and shot more like a un regulated co2 gun.

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PostPosted: Sun Nov 29, 2020 6:32 pm 
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Posts: 519
The regulator has to be in sync with the hammer spring.


https://hardairmagazine.com/ham-columns ... p-airguns/

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