Tuning Umarex Notos has arrived.

Not my picture but I'll be adding this barrel system to my Notos very soon but with the .22L CF tank.

Notos 500mm barrel.jpg
 
I'll be trying it out on a stock Notos first then I'll build a new Notos with full porting and a 3k regulator to see what it will do on the high end then I'll play with the Bellville washers to decrease reg pressure if needed.
That will be interesting to see. I bought one of c88's plenum extensions to add to the plenum I bought back in January and they will not screw together. I asked him what the problem was and he said if they won't go together I have a gen 1 plenum. Well since I got it in January and it is black not silver like his others I thought I had a gen 2 plenum. WRONG! The gen 2 plenum have only been out about 3 weeks. He said he would send me a gen 2 plenum free of charge. Now we know he's a great man to do business with and he does turn out very high quality products. Thank you c88machining
 
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I don't think about what I have into a gun anymore, I see it as rent, I pay a little each month and enjoy the experiences I get and accept the resell drop at the end.

I've always seen my hobbies as paying for the experience, not making an investment.

Pyrotechnics is MUCH worse! 🤪
 
Sooo… did anyone post the barrel twist ratio for the notos yet?🤨🙃🥹
I just installed 2 of the Gen ll plenums and was blown away with the changes. I sent him a message of high praise!

The Gen l plenums would not open or close by hand and galled. The Gen ll moves so nice!
so what kind of performance gains did you get from adding the extension to the plenum?
 
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Played around a little today and I slightly reduced the noise with a small adjustment on the hammer screw, maybe 5/8 turn out. More than that and the report was going back up. That yielded maybe 9fps reduction in velocity, but was getting solid 3 mags from 3600 to 2100 psi. I’ll stick with that setting for now. After adjustment…
JTS 16.08: 724.0, 723.2, 722.3
H&N FT Trophy 5.55mm 14.66: 739.6, 736.1
CPHP 14.34: 741.4, 749.4
And another round that seemed a little hotter after a refill, but the above should still have been above reg pressure…
JSB 13.43: 780.6, 769.0, 771.9
H&N FT Trophy 5.55mm 14.66: 749.4, 753.1
CPHP 14.34: 754.0, 754.0
JTS 16.08: 732.6
Maybe it’s still breaking in? I haven’t put that many rounds through yet. I’m still working on getting the scope dialed in.
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FWIW: Shot my Notos today. 5300' elevation. Temp was 85*. Pressure: 29.83. Humidity: 20%. Fired (6) shots total off a full fill. First (3) was a .2" group at 25 yds. Second (3) shots over Chronograph averaged 744 fps (742, 746, 744)...19.5 FPE with JSB 15.89 gr Hades pellets. Rifle is total stock except for working the trigger over. Very happy with the Notos. 20PPC

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