I'm up too 800 fps with no porting thanks to C88 and his FX barrel!
0.159" center to center 20 shot group.
0.159" center to center 20 shot group.
Last edited:
- 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 click HERE.
Umarex "Umarex Notos Update HUGE power Upgrade!" Or is it?
- Thread starter Firewalker
- Start date
The drilling of the "restricter plate" is a small part of it, doing this will give a gain of around 75 to 100 fps max.....I'm more familiar with the PP750 as I own one. The real power comes from drilling out the brass valve seat hole larger.
This is a better video showing the restricter plate......You will notice he doesn't make any mention of the brass valve seat.
This is a better video showing the restricter plate......You will notice he doesn't make any mention of the brass valve seat.
Upvote 0
Video says 25 gr at 980 for 40 fpe at around the 3:50min mark (which is inaccurate, 980 with 25 gr is 53 fpe, and 980 with 15 gr is 32)...
So I don't know what to say...however 880 with 25 gr is 43 fpe, so maybe he meant 880?
980 with 21 gr is basically 45 fpe, but video states he was doing it with 25 gr, really info is all over..
-Matt
So I don't know what to say...however 880 with 25 gr is 43 fpe, so maybe he meant 880?
980 with 21 gr is basically 45 fpe, but video states he was doing it with 25 gr, really info is all over..
-Matt
Upvote 0
"I took the restrictor plate off the red dragon. Keep that on the down low, it's not exactly legal."
-Frank the Tank
Upvote 0
All I see is some moron filming himself violating EPA regulations by venting freon to atmosphere. $15K fine if I recall. Not that I'm a Dudley Dooright, but I wouldn't film myself commiting that violation.
Upvote 0
Disabled comments on his video, and conveniently didn't have the chronograph, yeah smells fishy
Upvote 0
I could see a notos pumping out 40 fpe, but that would take a lot of work, and I don't know enough about the gun to state as to what that would entail given the stock barrel length of 11.75".
Is full bore porting possible? If not what is possible? 75% 85%?
What is the plenum volume in a stock notos, 5cc, 10cc, 15cc? Makes a huge difference.
But 980 FPS with 22cal 25.4 gr as stated in the video is absolutely not happening even with full bore porting on a 11.75" barrel unless you remove the regulator, then...it becomes very possible and quite easy to achieve even with 75-80% bore porting provided the full 66cc cylinder acts as a plenum and you fill to the max 3650 psi/250 bar.
Then...the stock hammer/spring arrangement probably couldn't smack the valve hard enough at 3650 psi, so you'd be hell bent modifying the valve and hammer to work in concert to achieve the velocity values stated in the video (980 fps with 25.4 gr).
So to that I say, it very well may be possible, but the gun would be heavily modded far more than the one shown in the video.
-Matt
Is full bore porting possible? If not what is possible? 75% 85%?
What is the plenum volume in a stock notos, 5cc, 10cc, 15cc? Makes a huge difference.
But 980 FPS with 22cal 25.4 gr as stated in the video is absolutely not happening even with full bore porting on a 11.75" barrel unless you remove the regulator, then...it becomes very possible and quite easy to achieve even with 75-80% bore porting provided the full 66cc cylinder acts as a plenum and you fill to the max 3650 psi/250 bar.
Then...the stock hammer/spring arrangement probably couldn't smack the valve hard enough at 3650 psi, so you'd be hell bent modifying the valve and hammer to work in concert to achieve the velocity values stated in the video (980 fps with 25.4 gr).
So to that I say, it very well may be possible, but the gun would be heavily modded far more than the one shown in the video.
-Matt
Upvote 0
.221" is as large as you can bore out the block to feed the TP.
I did not record the barrel porting but it's easy to measure with the barrel removed.
I have envisioned copying the AEA barrel porting where a channel has been grooved in a ring around the ports and 2 other ports are drilled into the barrel.
I still don't see nearly 1000fps with a 25gr pellet.
I did not record the barrel porting but it's easy to measure with the barrel removed.
I have envisioned copying the AEA barrel porting where a channel has been grooved in a ring around the ports and 2 other ports are drilled into the barrel.
I still don't see nearly 1000fps with a 25gr pellet.
Last edited:
Upvote 0
With the regulator yanked out its feasible if you smack the valve hard enough or run a special custom valve, when regulated very much a no.
-Matt
Upvote 0
My current notos with 500mm stx barrel is doing 34 fpe with jsb18gr at 928fps. Reg at 150bar, 67cc plenum volume, all ports drilled out to 4/4.5mm, and 4mm extra spring preload
Upvote 0
Hmm, this is about a good display of fpe as shooting paper. However, this says it all, see below.
Upvote 0
No way is he getting that much power on the stock plenum, I don't care if it's drilled out.
I think "Ed Snippin Man" is snipping some green stuff and smoking it.
I think "Ed Snippin Man" is snipping some green stuff and smoking it.
Upvote 0
Which size bottle is that and did you sand it to a matte look? Most Alsafe bottles are high gloss epoxyt.
Upvote 0