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Old 11-12-2007, 06:39 PM #1
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Location: Indianapolis, IN
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EOS FAQ & Ultimate Sticky

Megathread links will go here.

The Epiphany/EOS manual is available for download at
Mirror downloads here:
Epiphany manual
EOS manual
EOS quickstart guide

Last edited by Ydna : 11-12-2007 at 09:33 PM.
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Old 11-12-2007, 06:40 PM #2
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Location: Indianapolis, IN
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Epiphany / EOS Frequently Asked Questions:
Compiled by Ydna with help from others (Kolder; Chiumanfu).

If you've never dealt with an electronic marker before, check Ydna's Electro markers FAQ.

General questions:

What functional differences are there between the Epiph/EOS and a regular Ion?
The main internal difference is the Epiphany fire chamber which is semi-adjustable in that it comes with a number of "inserts" that control the firing volume. By adjusting the volume of the fire chamber you can increase or decrease the necessary operating pressure for the gun, for better fine-tuning the top performance. There are also theoretical benefits to this, being that higher pressures will theoretically recharge faster than lower ones.
The solenoid is also slightly different, in order to accommodate the higher operating pressures. An Ion solenoid won't work correctly with other Epiph/EOS internals (it will seal, but the shots will be inconsistent).

What other differences are there, compared to an Ion?
There are a number of cosmetic/aesthetic differences, namely the aluminum sculpted EOS body (Epiphany bodies were made from a magnesium alloy with polymer webbing attached). The frame is more ergonomic and comfortable (as well as stylish). The bottomline includes an integrated dovetail. The stock bolt is the lightweight Firebolt from SP. The bodies include a Q-lock clamping feedneck. The stock barrel is a Freak. The trigger is slightly redesigned and uses a different mounting pin.

Why should I get an EOS or Epiph instead of a regular Ion?
Epiphanies and EOSes come with some upgrades as stock parts, as well as the benefit of using anodized aluminum parts instead of the powdercoated parts from an Ion. The aesthetics are one of the advantages over the Ion's simplistic polymer exoskeleton.

Where is the cheapest place to buy one of these markers?
Most stores will sell them for the same price. SP and most other manufacturers impose a MAP price (mandatory-advertised price) which means that most retailers have to advertise the marker for at least xx dollars. As a result, most stores will advertise it for the same price.

How does the Epiphany/EOS work? Are there any other markers like it?
The markers use an open bolt electropneumatic blowforward design similar to that of an Automag, Freestyle, or markers that came after (such as the SLG, Threshold, Droid, Pikkadoll, and others). Epiphanies and EOSes function nearly identically to Ions and IonXEs, the only functional differences between them are peripheral characteristics involved with the method for firing (see below).

Stock parts & upgrades questions:

What barrel threads does it use?
The breech section is threaded "Smart Parts standard" barrel thread, which fits the following: Impulse, Nerve, Shocker NXT, SP8, SP1, Ion, Ion XE, Epiphany, EOS, Vibe, and future SP markers.

Can it run on Co2?
Yes. However, anti-siphon CO2 is strongly recommended. See your local proshop for installation of an anti-siphon system on your existing Co2 tank, or purchase a new one from an online store.

What regulators can be used?
Any standard regulator capable of screwing into a vertical ASA will work, as long as the reg output goes high enough to operate the Epiph/EOS. The marker functions between 200-300 psi so the reg needs to accompany this.

Does the marker come with an eye system?
Yes, same electronics as the Ion and Ion clones (SP1, SP8, etc).

What firing modes come stock on the marker?
The following are available: semiauto, rebound (ramping), three-shot burst, fullyautomatic. See below for ROF cap amounts.

What is the ROF cap of the stock board?
The stock board is capped at 17-bps for semiauto and rebound mode. Fullyauto and three-shot burst are capped at 10-bps. Most aftermarket boards will increase or remove this cap entirely, however it should be said that 17-bps is VERY fast in a game and ideally all you'll ever need.

What barrel shoots the best?
None of them. Just about any aftermarket barrel will perform the same as any other. Some have more or less porting, varying bore sizes, different external features, or other different characteristics...but it doesn't make that much difference in a practical sense.

My gun isn't shooting as far as others on the field...what can I do?
This usually means your velocity isn't as high as the other guns for comparison (or the other guns are shooting hot). Two markers shooting the same velocity should be very similar in terms of the effective "range". The only things that can affect it to a practical degree would be random air turbulence but that's not something you can control.
This means, if your gun is shooting 280-fps, and all the others are shooting 280-fps...if you think yours isn't shooting as far then chances are you're imagining it. Either that or your gun is somehow cursed (no).

What's the optimal barrel length?
For LP markers, 14-16 inches is optimal. You can use a longer or shorter barrel however typically this will reduce the efficiency slightly. Barrel length will also effect the difficulty to move around, ease of aiming, firing sounding quieter or louder, and other things too.

What hopper should I buy?
This is also a matter of personal preference. There are many styles of hoppers available so I suggest checking a local shop and seeing how various products balance when installed on a gun. Use different hoppers in games if you can.

Tech questions:

Which tank should I use, HP or LP output?
If you're purchasing a new tank then JUST BUY AN HP OUTPUT. There's no reason to get an LP unless you're using a specific regulator designed for it (wdp minireg).
In answer to the question, some LP tanks will work okay ont he marker but not all. It depends on how fast the tank reg recharges and the operating pressure of the marker. Pure Energy, Guerilla Air, Crossfire, are examples of those that should work okay.

What's the operating pressure?
Epiphanies, EOSes, and Ion-like markers equipped with Epiph internals function between 200-280 psi

Does the vertical adapter filter cause shootdown?
Is there a benefit to using the vertical adapter filter?
I heard the vertical adapter filter is only needed with Co2...true or no?
Can the marker operate without the vertical adapter filter?
The VA filter isn't a "required" part but I assure you there is no benefit whatsoever toward removing it. It will NOT increase any "flow" or whatever by any noticeable amount.
The filter is an insurance policy to guard against dirty air fills. Dirty air fills can happen with both CO2 and HPA. In fact they are fairly common with HPA. HPA is not always "cleaner" than CO2.
The marker will function without the VA filter installed, but it doesn't mean you should do that. As mentioned it's an insurance policy to guard against bad performance. It's recommended you leave it in and be happy.

How do I adjust the velocity?
The vertical regulator controls the velocity. It's adjusted by screwing the regulator adjustment endcap in or out. Ion/Epiphany regulators use a 5/8" open-end wrench to adjust; IonXE/EOS "Max-Flo R" regulators use a 5/32" allen wrench inserted through the bottom to adjust. Regardless of the tool, the pressure is increased when screwed in (clockwise when looking up at the bottom of the reg) and decreased when screwed out (opposite).

Is the stock solenoid capped at 20-bps?
Can I use a different solenoid that can cycle faster?
How fast can this gun fire, physically?
The stock solenoid isn't a practical limiting factor; it will allow you to fire faster than 30-bps with the correct upgrades and settings. The stock board is capped at 17-bps but this is just an electronic limit imposed by the programming; other boards will raise or remove this cap entirely.

What's the best dwell setting to use?
There's no such thing as the "perfect" dwell setting (if there were then it wouldn't be adjustable). Every marker operates a little differently and every marker requires some tuning to get performing well. Unless you feel the need to tinker with your gun, you are advised to just leave the board on the stock settings (40-55 blinks for dwell, no QEV installed).

Last edited by TargetIndy : 11-15-2007 at 08:50 AM. Reason: FAQ added
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