Umarex Tuning the ZELOS Problem (SOLVED)

Yep, not enough hammer. There is always an adjustment, just a matter of how it is done.

kaylaindy said:

The ZELOS comes from the factory at 2000PSI regulator pressure and it can be turned up to 3000 PSI. When I turn it past 2500 PSI I get no increase in velocity. I would like to get my 25.4gr going 920 FPS but can only get a consistent 905 FPS. When I go to 2750 Reg Pressure the velocity goes down a bit to 890, the same velocity I can get at 2300 PSI reg.

Why does me velocity not go up between 2500 and 300 PSI? There is no HST adjustment that I know of on the Zelos. Is that the problem?

Once I increase the reg do I need to shoot it for a while for velocity to rise?

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As Scoty42 noted. Have adjusted the hammer?

Youtube says remove stock and you will see the tensioner.

Excellent! Keep reading the forum(s)-some good ones over seas also-, you've learned which end of the scope should point forward, and adjustment. Break into the world of actual "tuning" and you will smile more and more.

John

The REG on my new rifle developed a leak in the sense it just passed on tank pressure to plenum.
Me not seeing that, went shooting happy fellow as i always try to be, and was just cut down by my brand new rifle barely able to get a slug out of the barrel.
Discovering the massive 300 BAR regulated pressure, i gave the drain screw a go and got the pressure down to the 100 BAR i was supposed to get.
And proceeded to shoot just fine for the rest of the day, though i am sure with a few days of sitting the pressure would have gone right back up.

Got myself a HUMA regulator, and of course also renovated the original one as i had the parts for it, but HUMA one performing just fine so no sense in putting the factory regulator back in the Two.

But for a few seconds that day i was WTF with my ( i believe it is called ) valve locked rifle, CUZ working against that much pressure, well even with a fancy smancy valve like in the Two, well just no chance.