[Recluse tha Ripper]

I call for dm eigenbolt.

[insanesaint]

Just installed my eigenring on my DM9, went to chrono. I was chronoing at 180fps so I raised my hpr out one full turn. Fps went to 200, so I slowly started to raise my hpr until I was at the very end of the adjustment. Highest FPS I could attain was 220. I checked all my settings, dwell was at 21, LPR was 3 turns out, fresh 9volt, paint was fit to bore. Wasn't sure what to do next so I removed the eigenring and went back to chrono. FPS jumped to 320+/-5, had to turn in my HPR 2 1/2 turns to get back to 285 FPS. I installed the ring per Lurkers directions, no inner o-ring and lube on both inner and outer groves. Stop ring fit perfectly. Not sure why the drastic drop in FPS, any ideas?

[Anadrol]

Dwell ? and your reg what was it set at ?

[Feloniousnick]

Originally Posted by insanesaint

Just installed my eigenring on my DM9, went to chrono. I was chronoing at 180fps so I raised my hpr out one full turn. Fps went to 200, so I slowly started to raise my hpr until I was at the very end of the adjustment. Highest FPS I could attain was 220. I checked all my settings, dwell was at 21, LPR was 3 turns out, fresh 9volt, paint was fit to bore. Wasn't sure what to do next so I removed the eigenring and went back to chrono. FPS jumped to 320+/-5, had to turn in my HPR 2 1/2 turns to get back to 285 FPS. I installed the ring per Lurkers directions, no inner o-ring and lube on both inner and outer groves. Stop ring fit perfectly. Not sure why the drastic drop in FPS, any ideas?

in there

[Feloniousnick]

Originally Posted by QuiverKiller

My dm10 is running on a dwell of 12 with the LPR set for consistency. Gun is shooting fine, no bolt stick/fsdo at around 45 degrees Fahrenheit. Only issue is that on the last shot of every loader, i have bolt stick and the paintball wont make it out the of the barrel, no idea why.

Was getting around a rotor and 5 pods off a 68/45 before the eigenring, not sure if its any better now, ill report back after practice tomorrow with efficiency number

Out of a full 68/45? A broken in and tuned DM should be closer to 8-9 pods stock.

[insanesaint]

Originally Posted by Feloniousnick

in there

Thanks for the response. Anybody have any suggestions?

[M98custom1212]

Originally Posted by insanesaint

Thanks for the response. Anybody have any suggestions?

really the only thing i can think of is dropping your dwell

[insanesaint]

Originally Posted by M98custom1212

really the only thing i can think of is dropping your dwell

Could you please help me understand why lowering my Dwell would increase my FPS?

[MaSsAcRe251]

The Eigenring takes advantage of being able to have a lower dwell to help conserve air. From reading the threads it seems like common settings for most people are a dwell of 16 and LPR about 2.5 turns out. Give that a try.

[M98custom1212]

Originally Posted by insanesaint

Could you please help me understand why lowering my Dwell would increase my FPS?

I couldn't but that's all I have unless you post pictures of your bolt system

[QuiverKiller]

Originally Posted by Feloniousnick

Out of a full 68/45? A broken in and tuned DM should be closer to 8-9 pods stock.

Both broken in and tuned, neither of my dm's were EVER efficient. After 3 weeks of using the eigenring in near freezing temperatures I have decided to take it out of my gun. My gun shot well for the most part, but it would randomly have bolt stick (which caused chops) mid stream, and the possible efficiency increase wasn't worth how annoying it is to break paint every game.

I'll try putting it back in when it's warmer, but for now I'm done with it

[Lurker27]

insanesaint - make sure the sleeve is a very tight fit on the top hat, and installed dry. The only thing I can think of is if the sleeve got moved back and started restricting flow, you'd see that kind of decrease. The Eigenring doesn't exclude much volume at rest, and generally a drop in shouldn't result in large loss of FPS.

Quiver - did you spacer the assembly backwards with the O-ring around the back cap? It's possible that on your gun a standard o-ring there is too thick and leads to some bolt run up. I will be happy to send a thinner metric ring that more closely approximates the thickness of the octagonal stop ring.

[QuiverKiller]

Originally Posted by Lurker27

Quiver - did you spacer the assembly backwards with the O-ring around the back cap? It's possible that on your gun a standard o-ring there is too thick and leads to some bolt run up. I will be happy to send a thinner metric ring that more closely approximates the thickness of the octagonal stop ring.

The bolt does enter the breech slightly as I never put any oring on the backcap to account for the length added by the octagonal stop ring, but I don't see how that would cause bolt stick. It seems that the issue is that the eigenring's movement wasn't consistent each shot. Sometimes it would move more quickly, and sometime it would hardly move at all, causing erratic velocities while shooting a stream and bolt stick which led to chopping.

I may put an oring on the eigenring to try and get more consistency.

[Lurker27]

The bolt stick issue can be caused by the bolt moving too far into the breech or even barrel - velocity inconsistency could result from the ring itself not moving consistently, but it shouldn't affect the movement of the bolt much, since the DM uses a dedicated low pressure side. Also, there's a pretty big shifting force acting on the ring itself, so I'd be surprised if it wasn't moving with each shot. Even the little bit the octagonal ring moves the indexing of the bolt can cause weird little problems - it took me a long time to figure it out, actually.

[Ken448]

Exactly how tight should the sleeve fit? I dont think mine is moving, but how do I be sure? And how do we tighten it up?

You keep eluding to being positive the sleeve is tight fit but dont elaborate on what to do to MAKE it tight aside from de-lube the tophat before installation.

[insanesaint]

Originally Posted by Lurker27

insanesaint - make sure the sleeve is a very tight fit on the top hat, and installed dry. The only thing I can think of is if the sleeve got moved back and started restricting flow, you'd see that kind of decrease. The Eigenring doesn't exclude much volume at rest, and generally a drop in shouldn't result in large loss of FPS.

Quiver - did you spacer the assembly backwards with the O-ring around the back cap? It's possible that on your gun a standard o-ring there is too thick and leads to some bolt run up. I will be happy to send a thinner metric ring that more closely approximates the thickness of the octagonal stop ring.

Thanks Lurker, that might explain the drop in FPS. When I installed the sleeve, I left some lube on the tophat figuring it can't hurt since the ring itself has lube on the inner and outer groove, any residual lube could only help in the movement of the ring. Will test at the field and post update, thanks.

[gumby4mayor]

What actually makes the marker shoot "smoother" I understand the principles behind it being more efficient, and quieter. I just don't understand why it would shoot any smoother/reduced recoil.

[QuiverKiller]

Originally Posted by Lurker27

The bolt stick issue can be caused by the bolt moving too far into the breech or even barrel - velocity inconsistency could result from the ring itself not moving consistently, but it shouldn't affect the movement of the bolt much, since the DM uses a dedicated low pressure side. Also, there's a pretty big shifting force acting on the ring itself, so I'd be surprised if it wasn't moving with each shot. Even the little bit the octagonal ring moves the indexing of the bolt can cause weird little problems - it took me a long time to figure it out, actually.

Fair enough, I'll try that out at my next practice in a couple weeks, thanks.

Originally Posted by gumby4mayor

What actually makes the marker shoot "smoother" I understand the principles behind it being more efficient, and quieter. I just don't understand why it would shoot any smoother/reduced recoil.

The eigenring moves backwards as the bolt moves forward. It cancels out some of the force you feel as the bolt accelerates, because the eigenring accelerates in the opposite direction.

[gumby4mayor]

Thanks for clearing that up.

[Anadrol]

any way of getting rid the pinging sound ? any suggestions ?

[SmartWorrPartsPlayer]

Originally Posted by Anadrol

any way of getting rid the pinging sound ? any suggestions ?

What about using O-rings as bumpers?