I tried to get this basic conversation going last year. I felt like it should be somewhat predictable by looking at the design as to the flavor a given tank would produce. I’m glad you brought this up. Here’s the former discussion. Guide to Complicating Things - Formula for predicting flavor in RTAs
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you pretty much brought up the same points as everyone here 
nice thread, you’re definitely onto something with the chimney diameter in relation to the chamber diameter condensing the flavour, that coupled with distance the vapour has to travel, it would seem to get what I want it would need a larger than average chamber with a 1/3 of the size chimney and very ‘stumpy’…I’m finding this more interesting the more I’m finding out 
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Yes, I mentioned this about the Theorem when it first came out somewhere in a thread. My problem with the tank was I broke all the glass taking the tank off ( despite lubing it up with VG each time ) but man that thing does have some great flavor push and I forgot all about it.
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That’s been my approach thus far, and is (in my case) something that I have to give the largest portion of credit to Matt (SuckMyMod) for. Because, at that point, it was very early on for me, and I’d watched quite a few of his videos, and if it wasn’t for his videos, I wouldn’t know who Jaybo is.
In the video where he and Jaybo talk about it… they cover some of these aspects (chamber size, airflow, etc).
Regardless, being the personality type that is more curious about the science and operation of it, I could care less about what’s popular, and the explanation (as presented) made sense to me. So that’s what led to my trying it.
When I got it, I instantly hated the shortness of the drip tip, and the fact that it was glass too (which I hated the feel of against my teeth) made me automatically look for a replacement. During that search, and under the same mentality (things that choke the airflow = bad) I struggled to find a drip tip that didn’t narrow down at the base. I wanted airflow that was not only unobstructed, but also minimized any interference in the “pathing” as it was leaving the coil. My thought process being that if it’s bouncing off the chimney walls, some of that vapor is bound to get trapped onto that surface (just like when you boil water in a tall glass in the microwave, you have condensation on the sides above the water line) and you’d lose the flavour that you’re trying to get out of the top.
EDIT: What I finally landed on, tip-wise, was a friction-fit tip, that has the same large hole at the base, as it does at the top!
Even though I don’t have nearly the experience, or resources to compare the few I do own against, I still feel there’s something to what I’ve posted above. I also feel that, as nice as the Boreas is in so many other aspects (huge deck, easy to build, easy to wick, MONSTER clouds, “decent” flavor) the flavor sucks by comparison because the chimney is so damned long, and the deck (coils) are so far away from your mouth. This is what made my next step the Limitless Plus.
And between those two (the theorem and the plus) my search is over! Plus for the “carry tank”, and the theorem gets “tasting” (aka quick-swap) duty for both testing purposes, or when I get bored with flavors quickly.
I’ll still get a Troll v2 though… Just because. Lol
And while I still maintain the Cleito is an awesome flavor tank, which gives nice options for those looking to transition from coil buying into coil building (with it’s optional RTA), It’s just become too small for me to bother building on. BUT (on topic) even though it’s got what appears to be a really tall chimney, I think it’s saving grace (what keeps the flavor so awesome on that particular tank) is that, on the stock coils, the coil goes almost halfway up the chimney internally, thus keeping the flavour and airflow quite the straight shot up the pipe (no obstructions/bouncing of air/flavor).
EDIT:
But really, it’s all just theoretical supposition until such time comes that someone with the finances and/or access to the resources comes in and can say “We’re putting all these tanks into a custom built wind tunnel and smoke-testing the airflow patterns!”. If that time comes, best believe I’ll be glued to the tool! Lol
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Funny how opinions will vary. The Boreas is a true flavor tank to me. Perhaps the biggest difference has to do with build and method.
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You could have something there too! Build suggestions for me for a “revisit”? I’d love to like it even more! =)
So far, I’ve tried both single core SS 26/24ga, and well as SS claptoned 26/36ga (at at 2.85mm id).
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I’ve only used dual Ti builds with them. 22ga 7 wraps spaced and 3mm ID. TC set to 510F and 100 watts.
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Will try bumping the id then. Otherwise, that’s way too hot and too much power for my tastes! Lol
That could be another difference though… I typically run mine around the 40-60w range, and around 440-460F.
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And to me, with my build, that would be a very, very anemic vape. Hey, if you notice the prior thread of mine that I linked to, at the time I was hitting the Subtank Mini, Goblin Mini, Joyetech Delta II. My tastes have certainly changed since then. But back then my temp and power was pretty much what you descibe.
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I agree with your comments. The Boreas is a beastly tank and should be built and vaped in a beastly manner. I run a similar build as you and I find it works best above 550F and 75W or more.
I know vaping like this isn’t for everyone, but if you’re not happy with how it’s currently performing, try the Ti and cranking it up a bit.
Also heat hasn’t been a issue.
JMHO…
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Now I want a Boreas tank!..when will it end!..
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My personal guess would be, NEVER 
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Good coils, close to the ‘chimney’ - close to the tip, good airflow = good flavor.
The Mage RTA beats the panties off of many so called great flavor attys. And y’know, the Cleito with the RTA installed isn’t too shabby either.
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One discussion was air hole positioning at the coil/wick. A quick test is possible with the Smok TF-RDTA where the air flow is right at the coils. You can mount the coils low or raise them up. I found raising the coils worked best and often the advice is to mount them lowest to the air intake.
Ha and I know you guys think I must work for Joyetech, but you could just get an Ultimo. Even tho the build deck looks anemic (MG RTA rebuildable coil) I build with Geekvape SS fused Clapton wire (5-6 wraps 3.5 ID and Ti 22ga 3.5 ID. While a single coil it has what is described above …a short wide chimney and an unrestricted airflow.
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I guess this thread came out 20 minutes late.
I just bought a TFV8 Baby with a 5 Pack of T8 Coils… and I bought the build deck too.
(Because so many youtube reviewers said the flavor was better)
…except you have to vape at higher wattage with the T8 (Octo Coil)
vapinwithtwisted says the .4 Dual is the better coil to him because you can go a lot lower wattage and the flavor is still all there because it’s a short tank…
My Cleito’s are starting to leak a bit, these aren’t supposed to leak.
Would love any opinions on this tank specifically?
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the interesting thing is, we can all be using the exact same tank, each build it differently, wick it differently, adjust air flow differently, fire it at a different wattage or temp, and each of us get their “best flavor” 
… just amazing!
for me, if the tank gives me my “flavor fix” with the least amount of heat, and less clouds in my room, i’m happy. the TFV4 mini with a single clapton coil is still in daily rotation as a top flavor tank… joined by the Supreme and the TF-RDTA (my top favorites) - close runner ups, the griffin and the crius
never was convinced with the moonshot & theorem and others, where gravity works against the wick, and the coils are too close to the the lips. i’m struggling to find a new tank to add to collection that beats these. and we haven’t even discussed wicking and how that by itself can largely impact flavor (was re-wicking couple of tanks today and thought about that) … just too many variables, and a lot of fun!
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What sort of temp/wattage do you run the single Clapton in the tfv-4 just out of interest? I got my one a couple days ago and still playing around with it presently.
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@Hjwindsor, my TFV4 mini with it’s RBA, is happily married to an Ego One Mega battery - one of the first (stick) mods i got when i started vaping. so it would run between 3.8v to 3.3v or so depends on the charge in it. i have to build it around 0.5 to 0.7 ohms as this is the best range for that mod. if i move it to set on top of a TC mod, i would run it between 420 to 460F, and in VW i won’t go above 25w.
this set up (TFV4 w/RBA and the ego mega stick) is a nostalgic thing
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meet the happy couple 
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Looks awesome I’m running mine on a realoux 200s I have only tried the wire that came in it so far at around 25 watts and it’s tasty as hell. Thanks for the info very handy.
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