In My Real Experience Single Coil Setup better than Dual?

[Revelene]

My sexy 2nd wife

image

That's my setup too! Different tip though.

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[Aal_]

I think i found the answer to my own question.
whether you gets a high power output, its determined by the current output of your setup.
current output = the AMPs that your mod is producing.

I=V/R so a battery at 4 volt rating with a 1 ohm coil can output 4A.

so by putting the same amount of power on dual coil than a single coil, instead of you fireing all the power at a single channel, it gets distributed in dual channels at double surface, which generates less heat on each channel. that's why dual coil always heats up slower and produce less vape at a set ohm compares to the same ohm setting on single channel.

in results, if a dual coil setup's each single coil need to get performance pair to a single coil setup's coil, the ohms rating need to be cut in half too in order to produce same amount of the heat on each coil. so a dual coil need to be at 0.5ohms in order to have each coil generates the same heat compares to a single coil rated at 1ohm.

which I=V/R 4/0.5 = 8amps

for most of the 18650 IMR battery, such as mine Efest it has 2000mah with 10c discharge rate, which can be safely discharge at 20A current.

but for my 18350 Efest IMR, 800mah with 8c discharge rate, can only be safely discharge at 6.4A.

so people should stay away with 18350 mod with dual coil setup for safety.

Beware this is the theoretical mathematical conclusion.But in real life you need to ttake into account the temperature generated in the chamber, the airholes and the liquid feed. In a dripper you don't have a problem of liquid but you need to balance out the temperature and the air. So dividing by 2 and multiplying airhole by 2 is not always the answer. To many things to take into account. Do you know that the coils also heat each other up? And the air mix and the way it passes through the atomizer changes as well with 2 airholes. Moral of the story you cannot build a similar 2 coil setup as a deduction from a single coil setup. You have to re experiment and this is the only way.

 

[Revelene]

Beware this is the theoretical mathematical conclusion.But in real life you need to ttake into account the temperature generated in the chamber, the airholes and the liquid feed. In a dripper you don't have a problem of liquid but you need to balance out the temperature and the air. So dividing by 2 and multiplying airhole by 2 is not always the answer. To many things to take into account. Do you know that the coils also heat each other up? And the air mix and the way it passes through the atomizer changes as well with 2 airholes. Moral of the story you cannot build a similar 2 coil setup as a deduction from a single coil setup. You have to re experiment and this is the only way.

More science!

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[Aal_]

More science!

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But the last sentence is what matters

 

[GreatestUnKnown]

I think i found the answer to my own question.
whether you gets a high power output, its determined by the current output of your setup.
current output = the AMPs that your Mod is producing.

I=V/R so a battery at 4 volt rating with a 1 ohm coil can output 4A.

so by putting the same amount of power on dual coil than a single coil, instead of you fireing all the power at a single channel, it gets distributed in dual channels at double surface, which generates less heat on each channel. that's why dual coil always heats up slower and produce less vape at a set ohm compares to the same ohm setting on single channel.

Glad you found the answer. That being said it all comes down to your individual setup, so many people are running duals (myself included) because the RBA they have has the three post setup. I have found though that just because it has another negative post does not mean you need a second coil.

I did the opposite of what you originally posted about when I was first playing around. Wrapped a nice .9 ohm coil, vaped it and added another .9 ohm coil. That's when I realized I needed more air, with no air flow control RBAs though this was a permanent decision. VTF all increased but so did juice consumption, so now what the juice well used to hold for one coil is now split by two coils/wicks and will also shorten my battery cycle.

So now I have gone back to the single coil setup, plugged the second airhole and can get more vape time between drips but still have satisfying VTF.

Not everyone has their head in the clouds, some are content to play in the fog.

 

[Revelene]

But the last sentence is what matters

Couldn't agree more. Science is all about experimenting! Let me grab my lab coat... *queue the bill nye the science guy music*

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[Myk]

My experience is the same.

I don't think it's necessarily that single coils are better but that I can build single coils that work just as good.
I think the reason is I tend to build micro or micro style and singles can produce as much as I can handle.
If I was to compare my RDA/RBA duals to factory build Vivi-Nova or Protank they would be better. Likewise my Protank builds were better than factory and equal to the duals I was building at that time as far as vapor was concerned.

I've tried the ohms I like singularly as dual and wait. I've tried sub-ohm dual. I've tried high voltage. I just get more joy from singles.

 

[alkaiser]

above 0.7 ohms, i like to use a single coil (in my kfl)

for my 0.3-0.5 ohm builds, i use dual coils. the heat up time is pretty instant for those. (drippers)

that said, i rarely touch my kfl

 

[bertfelin]

i've also like to add. the main reason i prefer single coil than dual is safety concern first, then the steady output on each vape till battery run out.
I throw in a kick in my mod to be constantly output at 11W,plus the fail safe feature. so i can getting some power on each vape, instead of getting less vape after the battery voltage being dropped.
also, another factor is the kick will not fire under 1.5ohms.

 

[Exile]

I to prefer single coils over dual coils.

I have built sooo many different dual coil builds, and though they have worked ok, I still prefer a single coil.

Dual coils are good for sub-ohm builds. For 1+ ohm builds id say single coils are the way to go.

A 1 ohm single coil does not vape the same as a 1 ohm dual coil. What I have noticed is that whatever single coil ohm you like to vape at (1 ohm single coil for me), then to get that same performance out of a dual coil build you want about half that ohms. (0.5 ohm dual coil for me)
28g kanthal single micro coil @ 1 ohm with cotton wick is what I like to vape. (7/64 airflow hole)

That and im always over dripping and im bad enough about spilling juice out of 1 airflow hole, 2 airflow holes and im always spilling juice everywhere! lol

 

[crazyarms]

Ive been experimenting with thicker wire and building sub ohm single coils. Right now im running a 26g 9 wrap micro coil in my reo and it is superb. Meters at .76 i believe, and puts out better flavor than most of my dual coil setups.