Why does a full tank give better flavour?

[Jebbn]

I vape dl using tc and at around 180c to 190c. My rta's don't get as warm or as hot as my mtl tanks and rta's did.
It's all very consistent from full to empty and even from rta to rta .
I do think that when I chain vaped mtl without tc it was less consistent as I worked my way through a tank. Some of those little mtl tanks and rta's get pretty hot during a heavy chain vaping session.

 

[Letitia]

I always just put it down to preferring the taste from a cooler vape, a full tanks juice is cooler. It's not unusual for me to lower watts several points when the atty gets gets about half empty.

 

[Pigs]

I also vape the doggies, I have 2, but dont vape them from start to finish. Because I have about 6 other rtas in rotation, a full doggie tank can sit there for a good week or so and it darkens , but the taste isnt that far off a fresh tank. When I first got them I vaped them all day long and didnt notice any real darkening, so it depends on how fast you vape that tank. As for the gennys, I think alot had to do with the amount of oxidation one did to their wicks. I use to run really low ohms at .7 (back in the day that was low) and had awesome results with a solid wick totally oxidized and seen not only darkening, but loss of flavor. I also tried wicks that were only oxidized by the coil (pulse oxidized, Peter K I think it was called) and darkening was not as bad but my vaping experience wasnt as good , meaning I had the occasional hot spot deal. I also think how deep the wick was into the liquid had something to do with it.

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What's a doggie tank?

 

[vaper1960]

About the gravity thing... think about going deeper underwater. The deeper you go, the more pressure. Even at the small scale of ml of juice it still applies. Also, at least with some tank designs (I really noticed this with my PockeX) as the juice level in the tank gets lower, there is not an easy way for air to get in so it almost crates a negative pressure. I could tell with the PockeX and would simply loosen the top (let air in) and it suddenly would wick better. Also, the whole temperature thing makes sense. I don't think any of this applies to something like a RDTA but have no experience with those (not yet, but just got one to play around with) One solution to help keep wicks saturated is do "primer puffs" between vapes.

 

[Ryedan]

What's a doggie tank?

This is the original Doggystyle and this is the latest version, 2K18 Doggie.

I think I have a lifetime supply of the original

 

[Vape1048]

I haven't actually noticed much difference in flavor... but if I had to guess it would be due to pressure difference and saturation. As cotton ages, it's ability to saturate via capillary attraction will reduce. Less saturation would leave more contaminants; therefore, less flavor will be a result. Also, as the liquid gets lower, there is less pressure difference between the fluid in the tank and chimney where your coils are resting. Things naturally want to travel from an area of higher pressure to one of lower pressure, which is how a vacuum works. So that means wicking happens slower through the juice ports (both these- the pressure difference and wicking speed variations- would be tiny in change but still present). So these things together- older cotton getting gummed up, as well as, an emptying juice tank, could result in less flavor, due to less wicking and saturation.

 

[vapdivrr]

I vape dl using tc and at around 180c to 190c. My rta's don't get as warm or as hot as my mtl tanks and rta's did.
It's all very consistent from full to empty and even from rta to rta .
I do think that when I chain vaped mtl without tc it was less consistent as I worked my way through a tank. Some of those little mtl tanks and rta's get pretty hot during a heavy chain vaping session.

I think you made a good choice moving to dtl tanks as mtl tanks imo arent really meant for chain vaping. It would be equal to hot boxing a cig, which would get pretty hot...perhaps a good mtl rta built really good with not to thick of a juice and an above average af can do it, but a true mtl rta is best when smoking it like a cig. But then again, I believe no tank should be chain vaped.

 

[dwcraig1]

Caramelized juice leaching from the wick/coil back into the juice in the tank.
How about if you only fill it half way, fresh of coarse?

 

[Ace80s]

I've noticed that a full tank of juice gives me considerably better flavour than a half empty one. Especially with the boro tank on my BB. Wonder why. Something to do with air pressure?
Any theories out there?

I noticed that too. They are basically gravity feed so it wouldn't surprise me if a full tank has more pressure if you will than a 1/4 tank or whatever.

 

[DaveP]

Pressure mostly. That's why I fill up but not to the brim. Make sure you leave a bubble for air pressure to form. Me, 3/4 of a tank is the best vape. I keep all of my tanks (even electric) 3/4 of the way full and fill up when they reach 1/3

Agree, but I vote for vacuum instead of pressure. Negative pressure when you draw on the drip tip creates a partial vacuum in the chimney that draws juice through the deck to the wick. The bubble is important. Without it, you get a vapor locked condition and it's next to impossible to get juice into the chimney ports.

When the tank is almost empty it's very hard to create enough negative pressure to keep the wick wet (because you are trying to create vacuum with more air in the tank). When the tank is full, there's the pressure of the juice forcing the juice down into the tank toward the coil (on a bottom coil atty), plus the vacuum at the drip tip pulling the juice into the chimney.

 

[DarrenMG]

Yea, it could be a vacuum problem with some tanks. I knocked over my freemax mesh tank, and it leaked badly, but I suppose that's a good thing too that it lets enough air in (that tank eats juice). Some other tanks I've had were better sealed, but I find myself using tanks less and less often.

I mostly use RDAs, and have recently gotten into squonking, and what is true is that a fully saturated wick/coil/mesh tastes better to me. That, and vapor production, is how you know it's time to re-drip or squeeze the bottle.

So yea, it could be the OPs tank is fighting him to keep the wick saturated.

 

[Jebbn]

I think you made a good choice moving to dtl tanks as mtl tanks imo arent really meant for chain vaping. It would be equal to hot boxing a cig, which would get pretty hot...perhaps a good mtl rta built really good with not to thick of a juice and an above average af can do it, but a true mtl rta is best when smoking it like a cig. But then again, I believe no tank should be chain vaped.

Not sure what you are saying, I dont chain vape. What made you think I did?
I dont consume much more than you do a day, iirc.

 

[Susaz]

Agree, but I vote for vacuum instead of pressure. Negative pressure when you draw on the drip tip creates a partial vacuum in the chimney that draws juice through the deck to the wick. The bubble is important. Without it, you get a vapor locked condition and it's next to impossible to get juice into the chimney ports.

When the tank is almost empty it's very hard to create enough negative pressure to keep the wick wet (because you are trying to create vacuum with more air in the tank). When the tank is full, there's the pressure of the juice forcing the juice down into the tank toward the coil (on a bottom coil atty), plus the vacuum at the drip tip pulling the juice into the chimney.

Vacuum inside the chamber but pressure outside. That's why bottom air tanks leak when the pressure is high or temps are high. Needs air pressure inside the tank to be sucked into the chamber's vacuum.

 

[vapdivrr]

Not sure what you are saying, I dont chain vape. What made you think I did?
I dont consume much more than you do a day, iirc.

It's in your post....it said when you use to chain vape mtl....I just said that mtl tanks arent made to really do that

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[Jebbn]

It's in your post....it said when you use to chain vape mtl....I just said that mtl tanks arent made to really do that

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Oh yeah, sorry. When I was quitting.

 

[vapdivrr]

Oh yeah, sorry. When I was quitting.

Sorry if it came off wrong, but when I see a post about a hot tank , hot vape, I think its important to expound on it. We dont know alot of things about vaping, but one thing we do know is if a coil reaches over a certain temp, bad things can occur from that. If you were noticing this as you stated, it's a good thing you didnt care for it or you knew you needed something different because of your vaping style. So in the end, I think anyone that feels their tank is hot or really warm and perhaps burning out coils or wicks should take a look at something else that doesn't do that.......

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[DaveP]

Vacuum inside the chamber but pressure outside. That's why bottom air tanks leak when the pressure is high or temps are high. Needs air pressure inside the tank to be sucked into the chamber's vacuum.

Exactly right. There's atmospheric pressure pressing on the tank from all sides. It's locked in place and balanced because of the air in the chimney VS the weight of the juice left in the tank. After the vape hit a bubble rises and equalizes the pressure again. Pressure balance occurs after a vape and you see a bubble rise from the chimney back into the tank.

Vacuum inside the chimney when you vape is key to getting the juice to move from the tank through the ports in the chimney and into the wicking. When negative pressure occurs the juice in the tank is able to move because the air bubble in the tank expands and allows some juice to enter the chimney. Without the air bubble in the tank expanding you'd experience hydrostatic lock and the juice couldn't move from the tank into the chimney.

Inside the tank it's kind of like dipping a straw in water and then pressing your finger over the top. The liquid stays in the straw until you lift your finger. That little air bubble expands under a vape hit and some juice is allowed to leave the tank and enter the chimney, then as pressures equalize the bubble replaces the juice that left the tank and it's all balanced again.