Single coil/Dual coil?
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The only thing I notice is the dual coils eat up my batteries and liquid faster.
On RDAs I find dual coils to be a little hot for my liking. I usually build my Magma single coil and I haven't used my Fogger in quite awhile. I think folks how enjoy a warmer vape tend to like dual coil but I could be wrong...it has happened 
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My favorite is dual coils on a small chambered dripper. There are some tanks that are designed for dual coils. I always found they had to much mass and took up too much space in a kayfun.
I find that in clearomiser type delivery devices single coil is better UNLESS the airflow available is more than the standard 2 or 3 one mm holes.
The Emow works well with dual coils.
I have never understand when someone raves on about 'flavour'. Personally i cannot detect any more flavour when switching from single to dual coils. More vapour, less battery run time, more juice used. That's it for me.
If i use my DIY RY2 in a single coil Kayfun and a dual coil Aqua what i get is a different taste from the same juice. Not more flavour.
For me, i see no advantages in using dual coils over singles.
The Emow works well with dual coils.
I have never understand when someone raves on about 'flavour'. Personally i cannot detect any more flavour when switching from single to dual coils. More vapour, less battery run time, more juice used. That's it for me.
If i use my DIY RY2 in a single coil Kayfun and a dual coil Aqua what i get is a different taste from the same juice. Not more flavour.
For me, i see no advantages in using dual coils over singles.
^ you stated the advantage in your own post. More vapor production at the same flavor intensity. I also find dual coils produce a vapor with more draw weight/ lung feel.
Experiences are going to vary wildly with this but, in my experience, I find little advantage to dual coil set ups with any mouth to lung toppers. All of my M2L atties are very small chamber RDAs so single coils work well once you get them dialed in. Quite a bit less vapor but flavor is very good, throat hit is good once you get coil placement correct, much more like a smoking experience.
My dual coil rigs are all direct lung hitters and produce waaaay more vapor, vape warmer in general, and flavor production is a matter of getting the build and wick set up correct for the atty being used.
So, for me, one is "better" than the other based on what and how I am vaping and I run both every day.
My dual coil rigs are all direct lung hitters and produce waaaay more vapor, vape warmer in general, and flavor production is a matter of getting the build and wick set up correct for the atty being used.
So, for me, one is "better" than the other based on what and how I am vaping and I run both every day.
For me it depends on if I'm chasing clouds or flavor..
This is a single coil for flavor
This dual coil setup is for clouds..
Both were using BFM/Dark Horse RDA
sent from my Droid Maxx via Tapatalk
This is a single coil for flavor
This dual coil setup is for clouds..
Both were using BFM/Dark Horse RDA
sent from my Droid Maxx via Tapatalk
Wow! I'm not really a cloud chaser. I was never a fan of clouds when I smoked and some bars really get to me because of the haze. Some shops that have a thicker haze are not my favorites either.
It had just occurred to me that I was using all dual coils in my tanks, which is why I asked (I do have a Subtank Mini, but I'm still trying to find the right flavor for it, so it's not in use at the moment).
It had just occurred to me that I was using all dual coils in my tanks, which is why I asked (I do have a Subtank Mini, but I'm still trying to find the right flavor for it, so it's not in use at the moment).
A factor of 2.
Twice as much vapor. Theoretically, should equal twice as much flavor, but lots of variables involved.
Twice as much vapor. Theoretically, should equal twice as much flavor, but lots of variables involved.
Dual coils are in some ways like dual carburetors on old cars, they may have more power but use more gas.
I never used dual coils in clearos or cartos, but it's been a long time since I bought any of those. Since I moved to rebuildable drippers and experimented a bit with single and dual coil builds I settled on dual coils whenever that's an option. These days I only use dual coils on mechanical mods (Reo Grand).
I have a process I go through when I design an atty setup.
1) What power (watts) do I want to build for the atty I'm going to be using.
2) What gauge wire do I want to use.
3) Fine tune the design. All variables get finalized here.
Power needs to be within the capability of the atty. A small chambered dripper with non-adjustable air flow does not handle nearly as much power as something like a Mutation X can.
For my all day vape, I like 0.3 ohms, 35-45 watts, in a small air chamber. I like that power level because I can get a good hit in 2-3 seconds and it's not so much power that the setup and atty required to handle it mutes flavor. I use the bottom fed Cyclone in the first link above.
Going to the Steam Engine coil wrapping calculator, here's the setup with 27 gauge Kanthal at 40 watts and dual coils. Heat flux is 418 mW/mm². Heat flux is how many watts per unit of surface area the coil is seeing. Go too high with this number and you'll be burning juice. Heat capacity is 14 mJ K-1 per coil, 28 together. Heat capacity is how much power it takes to heat up the coil to operating temperature. The higher you go here the longer it will take to get the coil to vaping temperature.
Trying the same 40 watts with a single coil means i have to use 23 gauge Kanthal to make the heat flux the same, but the heat capacity is 45 mJ K-1 so the coil will take longer to heat up.
In this scenario I found that dual coils fire up quicker, are less likely to burn juice at the same power levels and last a bit longer before I have to clean them. That works pretty well for me
OTOH, if you compare dual coils at say 40 watts to single coils at say 30 watts, the dual coil setups will use more juice and batteries will not last as long because of the difference in power level, not the number of coils.
I have a process I go through when I design an atty setup.
1) What power (watts) do I want to build for the atty I'm going to be using.
2) What gauge wire do I want to use.
3) Fine tune the design. All variables get finalized here.
Power needs to be within the capability of the atty. A small chambered dripper with non-adjustable air flow does not handle nearly as much power as something like a Mutation X can.
For my all day vape, I like 0.3 ohms, 35-45 watts, in a small air chamber. I like that power level because I can get a good hit in 2-3 seconds and it's not so much power that the setup and atty required to handle it mutes flavor. I use the bottom fed Cyclone in the first link above.
Going to the Steam Engine coil wrapping calculator, here's the setup with 27 gauge Kanthal at 40 watts and dual coils. Heat flux is 418 mW/mm². Heat flux is how many watts per unit of surface area the coil is seeing. Go too high with this number and you'll be burning juice. Heat capacity is 14 mJ K-1 per coil, 28 together. Heat capacity is how much power it takes to heat up the coil to operating temperature. The higher you go here the longer it will take to get the coil to vaping temperature.
Trying the same 40 watts with a single coil means i have to use 23 gauge Kanthal to make the heat flux the same, but the heat capacity is 45 mJ K-1 so the coil will take longer to heat up.
In this scenario I found that dual coils fire up quicker, are less likely to burn juice at the same power levels and last a bit longer before I have to clean them. That works pretty well for me
OTOH, if you compare dual coils at say 40 watts to single coils at say 30 watts, the dual coil setups will use more juice and batteries will not last as long because of the difference in power level, not the number of coils.
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