Why do dual coils?

[DuffTime]

So, having never tried dual coils (except dual coil cartos, wasn't a fan) I'm just curious why I should be looking to do it. I guess it would help to explain what I normally vape:

Reo Grand, Reomizer 2, .8 ohm micro coil, cotton wick.
Aga-T2(or similar Genesis) on a mech, about .6 ohms, SS Cable or SS Mesh wick.

Now, I can see why it would be silly on the reo grand, just too little space to work in.

But the AGA-T2. Plenty of space in there, and the holes are already made. For me to get a dual coil at the ohms I currently vape at, I would make (2) 1.2 ohm coils, right?

I'm not trying to knock dual coils, as I've tried a couple dual coil builds at vape meets and they were outstanding, but I'm just looking for an actual educated response. More VTF? Purer? Better response, what?

I understand the notions of vaping safely(eg battery safety, shorts/hotspots, all that good stuff). If I were to do this, should I try parallel coils, should I try 2 wicks dual coil, U-wick dual coil, what to do? I've just been on this single coil beat for so long that I really don't know where to start.

 

[Rule62]

Yes, when setting up dual coils, each coil must be double the desired resistance. If you're shooting for .6Ω, each coil needs to be 1.2Ω, and wired in parallel.
Personally, I've never understood the fascination with dual coils. I've never had any trouble getting good flavor and vapor from conventional single coil/wick set ups.

 

[REOfanatic]

With dual coils you get 4x the wraps for the same resistance but you also cover more wick area thus heating more wick and fluid. Its almost like building with a super low ohm wire

 

[notawoman]

A low ohm dual coil is nice, it heats quick and gives me a lot of flavor and vapor but it's a black hole for juice.

 

[Discord]

surface area and heat. Dual microcoils = heaven

 

[UncleChuck]

In my experience, the advantage of dual coils is more vapor and flavor without getting a ridiculously hot vape.

Dual 1 ohm coils gives you over 30 watts of total power, with an overall resistance of .5 ohm. Now say you normally vape a 1ohm coil, but want more power. Dropping to a single coil .5ohm build will give you the same amount of power as the 1ohm dual coils. But that 30 watts of power will be concentrated on a single .5ohm coil. With 1ohm dualcoils, that same 30 watts of power gets spread out over not only an additional coil, but each coil has roughly twice the surface area. So a .5 ohm total rez dualcoil setup has around four times the surface area compared to a single coil .5ohm build.

This will give you more vapor, flavor, etc, but it will not get as blazing hot. I can't go below .7 with single coils before I start loosing flavor from my juice. I have a setup with dual .8ohm coils and it's about the same temp as my .7 builds, but with more flavor and vapor.

I forgot to say that dual coils with wide open air holes make the best lunghitters in my opinion. Single builds in a similar power range seem more harsh and irritating while doing a lung inhale. Where as dual coils seem to give a much smoother, easier lung hit.

 

[st0nedpenguin]

One word: MOAR.

 

[Mozzer]

Does anyone have any ideas why my 2nd coil takes longer to heat up, even though they're parallel? They're common positive on a genesis - Arrow. Maybe the 2nd one has a bit more resistance?

 

[ClippinWings]

Does anyone have any ideas why my 2nd coil takes longer to heat up, even though they're parallel? They're common positive on a genesis - Arrow. Maybe the 2nd one has a bit more resistance?

yeah the 2nd coil is longer... or has longer legs... or something.

The difference could be really small... just Adjust it.

The coils should heat evenly.

 

[Mozzer]

yeah the 2nd coil is longer... or has longer legs... or something.

The difference could be really small... just Adjust it.

The coils should heat evenly.

Thought so. Thanks very much for thoughts.