Ultimate Mod : 3ml Juice Tank for 801

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savagemyth

Senior Member
ECF Veteran
The purpose of this mod is to triple juice capacity by bypassing the cartridge with a high capacity tank inside a lengthened atty. A scrap 801 atty lengthens the body and a shortened scrap battery tube becomes the tank. Ventilation that normally occurs in the groove of the cart occurs in the space around the tank.

It's been enjoyable reading through all the mod posts and the interest in making the experience of vaping the most pleasurable. As I read through the brass screen mod page and users were commenting that the resevoir of fluid behind the screen was being held back rather than leaking through due to the surface tension of the liquid and yet being able to draw it due to the capillary action in contact with the bridge, it got my mind working. It seems we've got battery life, voltage, cart filler and technique dialed in. What's lagging is the capacity of the cart. I got these ideas of maybe a hole in the cart with specially designed juice bottle nozzles for rapid filling (don't know about you, but nothing worse than having to refill every 20-30 minutes) or maybe a bottle and hose outside of the unit. Then I thought, well wait, what if the atty were bigger? We could increase the cartridge size. Mind you, this isn't something you'd use for a night on the town, but for someone like me who drives truck and likes to be able to drive nonstop for 8 hours plus, a mod where you can plug in your passthrough and not have to do anything for more than an hour or two would be welcome. I thought of designing something from scratch, but in appreciation of the modders here and their ingenuity, I decided to utilize a do-it-yourself solution that can kill two birds with one stone- increase the juice capacity AND use all those spare parts I keep hearing everyone has laying around. Without wasting more time, i'll get to it!

For my mod, i'm using a dse801 from "HG" which is an SLB stamped unit. I started by stripping a battery and atty of their insides. You may want to soak them in acetone to loosen up the glue holding them together. I lucked out and had one a friend had broken by sitting on it.

In photo 1 you can see the size difference and photo 2 has everything laid out for you to see.

1 Soak a scrap 801 atty and battery in alcohol overnight or acetone 10 minutes, loosening the glue. Remove the brass connectors, electronics and clean the insides. Save the plastic LED cap, you will use this.

2 Assemble the scrap atty on your working one (notice the tube is tapered) and mark the battery tube for cutting, as in photo 4. If you put the batt tube in and find the bottom, mark the top edge and lay it next to the mod unit.

3 Remove the inside of a cartridge and with a scissors or dremel, cut the white plastic down to approximately 1/4" exposed. Line the lip up to your top line on the batt tube and make a mark about 3/32" below where the bottom of the plastic would fall (to allow room for the LED cap).

4 Using a dremel cutting wheel or hacksaw, place the marked battery tube in a vise (you might want to wrap with a piece of rubber to prevent chafe marks like you see here) and make your final cut. File or sand the cut to remove rough edges.

5 Make 3-4 crosscuts in the end of the tube, cutting to a depth mirroring the height of your bridge. In this case, I cut to a depth of about 3/16". This produces the capillary draw across the element producing vapor.
 

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savagemyth

Senior Member
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6 Using a pliers, bend and remove 2 opposite tabs. This will further ventilate and allow room for the bridge.

7 Assemble the tank by replacing the LED plastic cap. Use superglue, my test revealed a leak on this end unglued. A possible mod for this may be to substitute a rubber plug or something that can be easily removed for fill (if using the screen mod) or something that facilitates filling with a hypodermic needle. I beleive something akin to the rubber cap you find on IV medicines might be a winner here.

8 Prepare the resevoir for filling. For the first test, I used the PTB mod using 2 full pyramid lipton teabags. The first is stuffed loosely all the way against the cap, the bottom one I folded into thirds and rolled up before inserting in the end. I will be testing using brass screen here, as this will increase the capacity and reduce leakage.

9 Place absorbent material in the cart end. For the first test, I just used paper towel. This will absorb any wayward juice traveling up the outside of the tank. This keeps you from getting a mouthful of juice and works quite well. If the resevoir is loose or rattles, cut another cart slightly longer than the original.

10 Fill and assemble. Without the PTB, capacity is approximately 3ml, with the PTB slightly less. Topoff after use looks to be about 1ml with PTB.

The result is similar to the screen mod - cooler burn, a sick amount of vapor and flavor, but with the ability to go without refill for 7-8 hours. The juice capacity is approximately 3x that of a regular 801 cartridge. Similar in production to this: http://www.e-cigarette-forum.com/forum/cartridge-mods/67487-texas-sized-e-cig-updated.html and the juice capacity is also equivalent, without being a 3 foot long monstrosity with drink kooshies. Although, that's kind of the charm there, I guess, lol.

The experience is as close to smoking analogs as i've had with anything vapor-related. The high production of vapor results in more flavor and nicotine delivery, juice modders may be able to mix even more flavor and VG to balance nicotine delivery to maximize your vaping pleasure. This mod definitely increases juice use, but shortens vape time to achieve nicotine satisfaction. A long, deep draw is now achievable without running the bridge dry.

No more goofing around with trying to make a tiny little cartridge bearable. These should have been designed with this capacity from the start.

I'm hoping others will mod this mod and maybe some manufacturers will come out with something along these lines (all rights reserved here of course for commercial use lol).

I haven't tested this with any other model as I'm not aware if their atty tube is tapered like this one. Let me know what you find.
 

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savagemyth

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here's a few more views for you. With the scrap atty in place the resevoir is shorter to allow room for the short cart and mouthpiece, so you don't see the resevoir. In the future, i'll remove the finish from the tank to make it prettier.
 

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savagemyth

Senior Member
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Thanks for your reply and i'll have to say, now that it's done it's nice being able to vape straight from the 5 all the way to the 10 o'clock news without a refill. Previously it was a real pain having to bring along 3 filled units, a spare cart and a bottle to go anywhere; and I can now spend my time on other things; and it also makes long distance driving safer. Maybe a life could be saved with this because someone wasn't fumbling around with their cart instead of paying attention to the road!

This is somewhat of an advanced mod and not everyone uses 801's but i'm hoping it inspires others to think outside of the box with their e-cig. I'd love to hear from anyone experimenting with or examining their model(s) for similiar mod possibilities. The main factors that made this one possible were (1) the atty is tapered, allowing them to 'stack' together firmly and (2) the batt tube is just the right width to allow vapor to pass around it inside the atty. The increased capacity can also open the door for other tank filler and juice delivery mods. Really curious what can work the best here. 2 PTB's seem to work well, perhaps there's something even better? Multiple mods might work: maybe blue foam in the top, PTB in the bottom and screen on the end? who knows? A ZFM plug mod might be the winner here, since that can eliminate filler. This is the mod for all mods, because it either maximizes or replaces them! Also, I need to know what adhesive works the best to glue the cap back on the batt tube without being dissolved by the juice. Superglue? Rubber glue? Caulk? Got no idea what the OEM substance is. Maybe no cap and use a removable plug of some kind? Or even something injectable is possible which would work nicely in tandem with the screen mod. This seems to be the main hangup with the screen mod, a way to refill without wrecking the screen. Well here we go, refill from the filler end!

Now you can get hidden pleasure out of the pain from failed 801 parts. Dead atty or battery? Oh well, you've got the mod part you've been waiting for!

As for me, i'm done with testing, and just enjoying the fruits of my labor and contemplating if it's possible to get "vaper's cough" from this. lol.
 
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savagemyth

Senior Member
ECF Veteran
Just thought i'd give you an update on my juice tank mod. I've done two new things that make this even better!

1.) Since there's no juice in the shortened mouthpiece cartridge, I poked 3 holes in the white plastic end. This allows more vapor and reduces the suction effect that you normally get on a PV, making it more similar to the airflow of an analog!

2.) I received a USB passthru from Puresmoker. Now i'm glad this mod extends the length of the atty, as it's the perfect length coming off the PT (while using the PT with your elbow on an armrest - helpful when driving long distance). I notice with a PT you go through the juice on a stock atty/cartridge in a couple drags. This doesn't happen with the juicetank mod!! If you're sick of the burned filler taste and refilling your cart every 10 minutes, try the juicetank mod, you'll love it!!

USBV2-1.jpg
 
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That is really a lot nicer than the road trip modification I did.
People tend to forget about the 801, a lot of potential there.

Here's a prototype of a big battery, 510 atty, juice reservoir device for the long all nighter.

I love the 801 myself, i think one of the reasons it gets neglected a bit is the size of the atomizers. I know I would love to mod around the 801 but its size rules it out of many of my projects.
 
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