You need a chrony.
Every spring is slightly different.
Start with the stock spring length.
Shoot and measure velocity then cut half a coil or less until you get the velocity you want.
Upvote 0
- The AGN App is ready! Search "Airgun Nation" in your App store. To compliment this new tech we've assigned the "Threads" Feed & "Dark" Mode. To revert back to a traditional "Forum List" view, and/or "Light" mode click HERE.
Tuning Umarex Notos has arrived.
- Thread starter pnwairgunner
- Start date
Every spring is slightly different.
Start with the stock spring length.
Shoot and measure velocity then cut half a coil or less until you get the velocity you want.
just saw something on ebay. i dont know if anyone here might be interested.
Umarex Notos Plenum Kit | eBay
<p>This is a Umarex Notos plenum kit. The kit consist of 2 shroud end caps and a 15cc plenum. Orings are already installed but spare ones are included along with the barrel orings. The front end cap adapter has a 1/2x20 unf thread that simply slips over the barrel and is drilled and tapped with...
www.ebay.com
Upvote 0
I just ordered one! They're made by @cfs916
just saw something on ebay. i dont know if anyone here might be interested.
Umarex Notos Plenum Kit | eBay
<p>This is a Umarex Notos plenum kit. The kit consist of 2 shroud end caps and a 15cc plenum. Orings are already installed but spare ones are included along with the barrel orings. The front end cap adapter has a 1/2x20 unf thread that simply slips over the barrel and is drilled and tapped with...www.ebay.com
Upvote 0
Also I emailed the ebay seller for the Avenger double magazine holder since I liked mine so much and requested he make some for the Notos.
He did! Here is the listing:
I also told him that lots of us use that 12 shot CARM magazine and he says he will order a CARM and make a holder for that too! Since CARM is on vacation til tomorrow and I don't know how long it will take to make the 3D file etc it may be a bit for the CARM holder but the OEM holder is out now.
He did! Here is the listing:
Umarex Notos PCP Double Mag Holder - Holds 2 stock MAGS ON PICATINNY RAIL | eBay
We here at F3D have designed this 3d printed a DOUBLE MAG holder that attaches to your Umarex Notos Picatinny rail! Umarex Notos with accessories in photo. JUST ADD THEM TO THE SIDE OF YOUR Umarex NotosAIRGUN for quicker access!
www.ebay.com
I also told him that lots of us use that 12 shot CARM magazine and he says he will order a CARM and make a holder for that too! Since CARM is on vacation til tomorrow and I don't know how long it will take to make the 3D file etc it may be a bit for the CARM holder but the OEM holder is out now.
Upvote 0
Will it fit standard CARM magazine? I belive the size is the same as the OEM. Can't check now as the gun is at the shop for some tuning
Upvote 0
I don't know for sure, sorry. He has a Notos with the OEM mag and then he told me he is ordering a 12 shot CARM mag and then will offer both the OEM size and the 12 shot CARM size on his ebay.
On the carm website the "medium cap" says holds 10 and is 8mm bigger than OEM and the 12 shot "high cap" is 13mm bigger than OEM
However the "normal" size CARM says it only holds 6 shots but OEM holds 7... not sure what that means for physical size cause it doesn't list anything.
Upvote 0
I just ordered a set of magazines for mine, I didn’t see that there was a “normal” sized one on there…. Dang. I thought his medium was the smallest capacity.
Hopefully I don’t have to get a riser for my scope to use the mediums.
Looking forward to getting them. Also ordered 4 mags for my Evol.
Upvote 0
Does anyone know what CRK stands for, after NOTOS ? I hope this doesn’t turn out to be a very dumb question !
Upvote 0
What side are you ordering and why ? Left or right ? With left side lever on NOTOS I would like mag to stick out on right side and on PP750 would like mag to stick out on left side. Which is good for the NOTOS ? Anyone have an image of the differences?
Upvote 0
Hey guys, I just wanted to mention I had an issue with a loose/wiggling picatinny rail and shroud on my new Notos. I found the issue to be that the screw that secures it was actually too long and was bottoming out before seating on the rail. I removed the screw and ground off 1-2mm and reinstalled it. plenty of threads to grab, and no more wiggle. I hope that helps someone else.
Upvote 0
Sorry if its been covered in this thread but I don't want to go through all of it.
Has anybody tested to see how low in velocity a 14-ish grain pellet can go in one of these?
Thanks
Has anybody tested to see how low in velocity a 14-ish grain pellet can go in one of these?
Thanks
Upvote 0
You need to get a softer spring for it to get anywhere lower than I think 18-19fpe? I cut my spring and lowered my reg and I'm at 700fps with 14.3 CPHPs.
Upvote 0
I just bought a second Notos which I detuned.
I am getting about 100-110 shots in the 460-490 FPS range with CPHP.
I used the same hammer spring I mentioned above.
I cut the spring to about 48-50 millimeters long.
I can get a range from 460 FPS to 680 FPS.
After it got off the regulator for the next 20 shots the velocity started to climb up to about 560-580 FPS then I stopped.
I am getting about 100-110 shots in the 460-490 FPS range with CPHP.
I used the same hammer spring I mentioned above.
I cut the spring to about 48-50 millimeters long.
I can get a range from 460 FPS to 680 FPS.
After it got off the regulator for the next 20 shots the velocity started to climb up to about 560-580 FPS then I stopped.
Last edited:
Upvote 0
i’m getting 774-779 with 14.3 before that plenum
796-804 after plenum with the same 14.3
no hammer spring or regulator adjustments
Upvote 0
Thanks for that info guys!
After some adjusting it looks like this Notos would work for what I need.
After some adjusting it looks like this Notos would work for what I need.
Upvote 0
That plenum kit looks very interesting, do you have any concerns about it's integrity to hold 3600psi?
Upvote 0