Dual coils and VW

[kingdal]

Hi all

So I'm wondering how much power I need to run dual coils.

On a VW, my standard vape is a 1.3 ohm coil at 10 watts. But when I build a dual coil, 10 watts hardly puts out any heat or vapor. How much watts do I need to pump in to get a vape equivalent to my single ohm? Is there some kind of formula for this?

Thanks!

 

[Wraith504]

what vw device? what is the topper ?

 

[MrPlink]

Your question is very confusing.

First what device are you using?

What is the resistance of your dual coil build?
Parallel dual coils I am presuming?
Parallel 1.3ohm coils will put you at .65 ohm.

To hit 10w you would only need about 2.5v. Here is where you may run into problems. Most VW mods that can run a .65ohm load will not be able to regulate voltage down to 2.5v.

As far as your main question of determining what would be the best wetting for your setup, there are FAR too many variables to give you anything that even resembles a concrete answer.

There are the voltage charts floating around out there. Avoid them like the plague, they are completely erroneous and don't even serve as a valid starting point.
Here are a few reasons why
- different attys respond differently to power settings and builds
-total resistance alone even if power is a fixed variable tells you nothing about the thermal characteristics of your coil (how it will perform). Compare the difference from a single 1ohm coil built with 32g wire to a 1ohm coil built with 26g. Just by looking at them you could make an educated guess and figure out that they won't perform the same.
- different juice reacts differently at different power settings (see how many times I said different there?)
-personal preference. No explanation needed here.

So what should you do then?
Easy, adjust to taste. Turn the power up or down until you find what you like.

I cut my teeth with mechs, so most my builds are focused on getting approx 4-3.7v, so for me that is usually my starting point.

 

[kingdal]

Thanks for the response guys and sorry for not being completely clear.

I'm using a Vaporshark Dna 20 with various toppers but for this discussion, lets say its an Atomic. I've got it set up with dual 30g coils at 9 wraps per piece, about 2.2 wraps per coil, 1.3 ohms in total. They're 2 separate coils so I believe they're called parallel.

I was under the impression that variable wattage would pump out the same amount of power (?) regardless if single or dual coil. Now I'm not so sure. I have tried adjusting wattage to taste but just can't seem to get it exactly right. I'm also wondering if there's some kind of ohms law calculator out there for dual coils.

Thanks

 

[Wraith504]

Thanks for the response guys and sorry for not being completely clear.

I'm using a Vaporshark Dna 20 with various toppers but for this discussion, lets say its an Atomic. I've got it set up with dual 30g coils at 9 wraps per piece, about 2.2 wraps per coil, 1.3 ohms in total. They're 2 separate coils so I believe they're called parallel.

I was under the impression that variable wattage would pump out the same amount of power (?) regardless if single or dual coil. Now I'm not so sure. I have tried adjusting wattage to taste but just can't seem to get it exactly right. I'm also wondering if there's some kind of ohms law calculator out there for dual coils.

Thanks

Steam Engine | free vaping calculators

 

[Nomoreash]

With dual coil your splitting the power between 2 coils. If you have it set to 10 watts that's only 5 watts per coil. In VERY general terms you need to double the wattage to get the same amount of power to each coil but again that's a very general example. Airflow, build, juice, preference, rda design and other things are going to play a role as well.

 

[kingdal]

That's really helpful. Thank you!

 

[Flt Simulation]

I am a little confused with all this ... I use 2 different toppers on my MVP 2.0

1. One is a Kayfun with a 1.6 ohm single coil ... For the vape I seem to like best, I set the my MVP to 10 watts (that equals 4.0v into a 1.6 ohm coil load)

2. The other topper is a Kanger Mega clearomizer with a factory 1.6 ohm dual coil head ... To get about the same vape as with the Kayfun, I also set my MVP to 10 watts (equals 4.0v)


I don't think it makes any difference whether your using a dual or a single coil setup ... if both coil setups have the same total ohms of resistance, feeding either setup the same voltage or watts as the other is going to give the same results.

 

[Flt Simulation]

I was just thinking ... On these dual coil heads like in the Kanger, maybe each coil is actually .8 ohms, resulting in 1.6 ohms total resistance because there are 2 coils in there.

Anyway, my dual coil (1.6 ohms) Kanger head needs the same voltage / watts as my single (1.6 ohms) DIY coil in my Kayfun.

 

[inswva]

I was just thinking ... On these dual coil heads like in the Kanger, maybe each coil is actually .8 ohms, resulting in 1.6 ohms total resistance because there are 2 coils in there.

Anyway, my dual coil (1.6 ohms) Kanger head needs the same voltage / watts as my single (1.6 ohms) DIY coil in my Kayfun.

Resistance is halved with dual coils, not doubled. A dual coil 1.6ohm Kanger would contain two 3.2 ohm coils. Two .8 ohm coils would result in .4 ohm of total resistance.

 

[vapdivrr]

With dual coils your basically have twice the wire then a single coil. Although each coil is only getting half the total power, a coil in itself needs a certain bit of power to heat and vaporize juice. If your used to a single coil at 1 ohm at let's say 10 watts then switch to a dual coil at a total of one ohm at 10 watts, it's just not the same because it needs alot more power to heat each coil properly. In that last example, 5 watts just is not enough to heat and vaporize the juice compared to the 10 watt single coil your use to. This extra power needed is even more noticed, when using a thicker gauge, that's why the difference may not be felt with smaller attys like a protank or something. With regular dripping attys and thicker gauge wire one definitely needs more power to run dual coils unless you will notice a lack of ramp time, flavor, and vapor compared to a single coil of the same resistance and power.

 

[Flt Simulation]

vapedivrr ... I am confused as to what your saying.

Here is my results from using a single coil Kayfun and a dual coil Aerotank:

If I have a single coil setup that shows a resistance of lets say 1.6 ohms ... and I feed it 4.0v (that's 10 watts) ... I will get a certain vape

If I have a dual coil setup that also shows a total resistance of 1.6 ohms ... and I feed it 4.0v (that's 10 watts) ... I will get about the same vape as the single coil setup above


That's been my experience

Now, if I doubled the watts to 20 on my 1.6 ohm dual coil Aerotank, the vape would be very very hot (and I don't think the factory OEM coils would survive for long either)

 

[vapdivrr]

vapedivrr ... I am confused as to what your saying.

Here is my results from using a single coil Kayfun and a dual coil Aerotank:

If I have a single coil setup that shows a resistance of lets say 1.6 ohms ... and I feed it 4.0v (that's 10 watts) ... I will get a certain vape

If I have a dual coil setup that also shows a total resistance of 1.6 ohms ... and I feed it 4.0v (that's 10 watts) ... I will get about the same vape as the single coil setup above


That's been my experience

Now, if I doubled the watts to 20 on my 1.6 ohm dual coil Aerotank, the vape would be very very hot (and I don't think the factory OEM coils would survive for long either)

Well mostly i was speaking about 2 of the same devices. Take maybe a kayfun single coil compared to a kayfun dual, or take 2 drippers, one single and one dual. In those the results would be different imo. I don't say the difference needs twice the power but it wouldn't be the same. I didn't read your post about your particular devices so my bad but was thinking more about this/ one dripper, single coil with 24g wire at 1 ohm in a mech or vv device at 3.7v, now compare that to a dual coil with everything else being exactly the same. The dual coil example will be much different imo and would benefit by adding a few more watts because there is twice the wire

 

[Flt Simulation]

vapdivrr ... I see what your saying.

For my 2 atomizers .. I make the single coil in the Kayfun from 9 wraps of 28 AWG around a 3/32" (2.4mm) rod ... resulting in about 1.6 ohms

I have no clue as to these 1.5 ohm dual coils in the Kanger Aerotank, but I pulled one of them apart and found they were made from very thin wire and the inside diameter was very small. Each coil was maybe 8 wraps.

Sure, there are 2 coils in there, but overall, there ain't much total metal in those 2 little dinky coils.
____________________________________

Kinda like what's better ... (2ea) 500 HP engines, or (1ea) 1000 HP engine?

 

[vapdivrr]

vapdivrr ... I see what your saying.

For my 2 atomizers .. I make the single coil in the Kayfun from 9 wraps of 28 AWG around a 3/32" (2.4mm) rod ... resulting in about 1.6 ohms

I have no clue as to these 1.5 ohm dual coils in the Kanger Aerotank, but I pulled one of them apart and found they were made from very thin wire and the inside diameter was very small. Each coil was maybe 8 wraps.

Sure, there are 2 coils in there, but overall, there ain't much total metal in those 2 little dinky coils.
____________________________________

Kinda like what's better ... (2ea) 500 HP engines, or (1ea) 1000 HP engine?

Yes those dual pre made coils are like 32g wire and like you said, very tiny. Even 2 of those tiny thin coils probably is still less wire then your 28g kayfun single, so it's hard to compare those set ups.