Umarex Zelos Compact .25 Are You Ready?

@Firewalker …what is the max fpe you can squeeze out of a stock .25 zelos ? Hoping they can push near 60 ?
I hit 112 fpe with a 48 grain in the 30 cal with Paul's valve kit. He makes them, so I'd think he could make one with a port sized for the 25 cal. I'd think 60 wouldn't be very hard to reach then.
 
What's the difference in the valves? Poppet?

Factory Valve

20241101_184438.jpg


Has a heavy spring, a a smaller poppet, a big spring seat, and smaller throat. It's also a 4 port design that had a chamber they vent into and up into the transfer shaft.

New Valve

20241031_203248.jpg
20241101_184532.jpg


Removes the spring seat for more volume, bigger throat and stem, the poppet seats right at the face. That, and the conical spring that rides on the edge of the plenum, it basically makes the plenum the valve body. It's a direct open flow now vs funneling thru the spring, seat, and small poppet. The exhaust port is also angled and enlarged, and lines directly up to the transfer shaft right into the barrel.

TLDR: IT FLOWS MORE AIR!
 
Factory Valve

View attachment 510171

Has a heavy spring, a a smaller poppet, a big spring seat, and smaller throat. It's also a 4 port design that had a chamber they vent into and up into the transfer shaft.

New Valve

View attachment 510172View attachment 510173

Removes the spring seat for more volume, bigger throat and stem, the poppet seats right at the face. That, and the conical spring that rides on the edge of the plenum, it basically makes the plenum the valve body. It's a direct open flow now vs funneling thru the spring, seat, and small poppet. The exhaust port is also angled and enlarged, and lines directly up to the transfer shaft right into the barrel.

TLDR: IT FLOWS MORE AIR!

The stock valve looks exactly like the Notos valve as does the spring.

I cant get a scale for them in different pictures.
 
Hey man, have you had the opportunity to see what the Zelos is capable of energy wise in
.25? I'm very interested in possibly ordering the 25 as well if its as impressive in .25 as .22.

Check out my post in the classifieds for the compact energy. The full size Zelos of course has more energy.

I'll be porting a few Zelos in the near future for those that want high fpe and to tune the Zelos to heavier pellets.

The FX barrel kit testing has gone well but it's 500mm so we still have a length limitation right now.

I'm very happy with how the .22 and .25 compacts have turned out, accuracy with popular pellets has been on par with FX similar sized guns.
 
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Check out my post in the classifieds for the compact energy. The full size Zelos of course has more energy.

I'll be porting a few Zelos in the near future for those that want high fpe and to tune the Zelos to heavier pellets.

The FX barrel kit testing has gone well but it's 500mm so we still have a length limitation right now.

I'm very happy with how the .22 and .25 compacts have turned out, accuracy with popular pellets has been on par with FX similar sized guns.
Im just curious if youve been able to generate energies higher than the advertised stock tune. Is it 60± fpe capable? Ill buy it I can start launching heavy mk2 at 880+? Thanks man
 
I'll throw some MKll down my full sized Zelos, I'll bet they get dark close!
It's embarrassing, I spent 1350 (gun only) on a gun that I had to add a heavier hammer to do that same feat. Stock, balls out, 600mm dream tac with plenum. STRUGGLES. To get a 34gr mk2 fx pellet over 58ft lbs. I am happy with what my gun can do with a 30gr hn slug... But, it's WAYYY more accurate shooting the heavy mk2s. I'm talking from .66-1.1moa to .36-.59moa. obviously a minute is more than enough to take game ethically at distance. But that's a rarity. I enjoy long shots, it's a satisfying accomplishment... But I find the majority of my shots come in the 25-65yr range. A good ~85% come within that range. At which, the precision and consistency of the pellet is king. I'm shooting 34gr at 55fpe getting 75-85 shots per fill temperature dependant.. I don't even have to question whether or not something is on the ground in agony. If it is hit... It is done. The fact that the zelos at 45% the cost can do at least that out of the box is a really nice thing to see.
 
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It's embarrassing, I spent 1350 (gun only) on a gun that I had to add a heavier hammer to do that same feat. Stock, balls out, 600mm dream tac with plenum. STRUGGLES. To get a 34gr mk2 fx pellet over 58ft lbs. I am happy with what my gun can do with a 30gr hn slug... But, it's WAYYY more accurate shooting the heavy mk2s. I'm talking from .66-1.1moa to .36-.59moa. obviously a minute is more than enough to take game ethically at distance. But that's a rarity. I enjoy long shots, it's a satisfying accomplishment... But I find the majority of my shots come in the 25-65yr range. A good ~85% come within that range. At which, the precision and consistency of the pellet is king. I'm shooting 34gr at 55fpe getting 75-85 shots per fill temperature dependant.. I don't even have to question whether or not something is on the ground in agony. If it is hit... It is done. The fact that the zelos at 45% the cost can do at least that out of the box is a really nice thing to see.
All that being said, if the zelos can match or beat, Im going to turn the zelos into the slugger/heavy slinger with the 1:16 and relegate the dreamtac to what its meant to be: A finely built scalpel with Exact kings.
 
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