In addition to being constructed from lightweight delrin, the Eigenbolt features a unique 2 stage force activation system that allows only 25% of the pressure to be placed on the ball. This creates a gentle environment for paint, while allowing the full flow from the solenoid to reach the bolt for crisp cycling speeds.
In addition, the Eigenbolt has had the soft face improved by adding an air gap for the ball to compress into, and has a unique internal taper to smoothly guide the air to the ball, rather than the rough step of the stock and other aftermarket bolts.
Q: I broke/lost the internal spacer o-ring, what size is it?
A: The best easily found replacement option is an 015 polyurethane ring - the same as a tank o-ring. We include a 014 90 durometer stock, but these can sometimes be difficult to find.
Quote:
Q: What is the best spring/kit to use with the Lurker Eigenbolt?
A: The STOCK spring works best - it prevents the bolt from slamming forward with too much force, and the kick-back is totally mitigated by the air bumpering system installed with the spacer.
Awesome instal guide and eigenbolt info! If you ask me the biggest thing keeping people from buying your bolt is they hear it's "difficult to instal", so they get worried and don't even try it. I think once people realize how simple it is to remove the stock bumper oring, then slide a spacer onto the bolt guide, you'll have more people wanting to use it.
I wanted to tune my eigenbolt for mostly efficiency to see how it shoots. The air bumper that is created when the bolt is at the end of it's return stroke and traps air in the bolt sail and spacer really smooths the shot out, and this is using the stock spring! Just picture it in your head, what would create less recoil, a bolt resetting quickly and smashing into a hard oring, or a bolt resetting that hits a pillow of air that slowly stops it? You can actually hear the air cushion while the gun cycles, right after the puff of air for the ball you'll hear a little "chud" sound, showing that a seal with the spacer is good. When I used a smaller 015 on the outside of the spacer, the sound went away, since the seal wasn't tight. You can also hear when the bolt isn't working properly, if the bolt makes a loud "click" sound at the end of it's stroke, then the spacer must be de-seating and traveling on the guide with the bolt. This will also usually be accompanied by the bolt sticking in the breech during cycling, and slower movement during cycling.
Right now my setting are:
OP: 160psi
open dwell: 4.5ms
closing dwell: 5ms
back cap: 1 and an 1/8th turns out
velocity: 285fps +/- 2
Super smooth cycling with those settings, plus with the backcap sweet spotted at a hair over 1 turn, it's efficiency is notably higher than with the backcap at 1.5 turns out and higher. I have a virtue rotor board with rf kit on it's way to me, since the seed kit was discontinued virtue board with rf is the only way to have auto-unjam with the rotor. Whenever I get the odd jam my unjam arm does nothing, lol. With the rf kit I'll actually be able to see how fast this bolt cycles, since my stock rotor maxed out at 22 bps.
with the backcap sweet spotted at a hair over 1 turn, it's efficiency is notably higher than with the backcap at 1.5 turns out and higher.
Interesting point! I've been running 1.5 turns for a while now, but I may start messing with it a bit more tomorrow when I go to the field. Since I shoot a 50ci tank, efficiency is a bit more important.
If you're having trouble with your Mini/Axe, PM me! I'm more than happy to help out. Proud Beta-Tester and Authorized Retailer for Nummech - Proudly Sponsored by APX - Guerilla Air - Hustle PB
Interesting point! I've been running 1.5 turns for a while now, but I may start messing with it a bit more tomorrow when I go to the field. Since I shoot a 50ci tank, efficiency is a bit more important.
Most people think that a low dwell = high efficiency, now while a low dwell will indeed increase efficiency, how open the back cap is plays the biggest role. It controls how far the poppet can open, thus how much air can escape to propel the ball. Just like if you have the back cap all the way in hardly any air escapes. Even just half a turn of the back cap can lead to an extra hopper of balls from a 68/4500 fill. Having it screwed in farther also puts more tension on the poppet spring, leading to it resetting the poppet slightly quicker.
Also a note: I used Boss' infamous bolt and it worked great! Awesome bolt, but I liked the gentleness and sound signature of lurker's bolt more. So since lurker's bolt reaches the vent holes in the bolt guide faster because of the cut out bolt sail, I added boss' bolt spacer and oring, so it would limit how far lurker's bolt would travel, making it stop right after moving past the vent holes. Obviously this also added a bumper for the bolts forward motion, combined with the air cushion on the return stroke, I've created a hybrid bolt with maximum smoothness The spacer also changed where my back cap sweet spotted, from 1.5 turns out to a little over 1 turn. This allowed me to keep the same velocity, but with a more efficient back cap setting. Very happy with my current set up.
If you're having trouble with your Mini/Axe, PM me! I'm more than happy to help out. Proud Beta-Tester and Authorized Retailer for Nummech - Proudly Sponsored by APX - Guerilla Air - Hustle PB
Last edited by incognito-z : 05-26-2012 at 04:59 PM.
Also a note: I used Boss' infamous bolt and it worked great! Awesome bolt, but I liked the gentleness and sound signature of lurker's bolt more. So since lurker's bolt reaches the vent holes in the bolt guide faster because of the cut out bolt sail, I added boss' bolt spacer and oring, so it would limit how far lurker's bolt would travel, making it stop right after moving past the vent holes. Obviously this also added a bumper for the bolts forward motion, combined with the air cushion on the return stroke, I've created a hybrid bolt with maximum smoothness The spacer also changed where my back cap sweet spotted, from 1.5 turns out to a little over 1 turn. This allowed me to keep the same velocity, but with a more efficient back cap setting. Very happy with my current set up.
Update: I tried This setup^^^ today, and it was insanely smooth. 160PSI felt like 120ish. Unreal.
If you're having trouble with your Mini/Axe, PM me! I'm more than happy to help out. Proud Beta-Tester and Authorized Retailer for Nummech - Proudly Sponsored by APX - Guerilla Air - Hustle PB
It was a math joke about making an intimidator shoot like a matrix, originally
Am I the only one that has brought up such a question? I feel as if I am hah.\
I thought it may be something to do with the German physicist named Eigen. He did some studies on extremely fast chemical reactions. Haha thought that may of had something to do with it.
The spacer also changed where my back cap sweet spotted, from 1.5 turns out to a little over 1 turn. This allowed me to keep the same velocity, but with a more efficient back cap setting. Very happy with my current set up.
