.5 ohm build with most surface area on Dark Horse RDA?

[Clean Clouds]

Ok I just read a really long write up on the forums talking about how sub-ohming was for mech mods, but surface area is more important on regulated devices for vapor production.

Link to thread I'm talking about: http://www.e-cigarette-forum.com/fo...ughts-about-sub-ohm-latest-vv-vw-devices.html

I took the advice about surface area. Used 28 gauge kanthal and did a dual 16 wrap per coil build. Ended up at 1.2 ohms. The problem was that my Sigelei 100 watt maxed out at about 65 watts.

Then I realized that I need to be at or below .5 ohms to use all 100 watts on the Sigelei 100 watt (Correct?)

I want to be able to use all 100 watts while maximizing surface area. Can anyone recommend me a build?

Sorry, still pretty new at building. Have only tried two builds so far.

 

[Yorkshire_pudding]

You can have a play around with Coil wrapping | Steam Engine | free vaping calculators to see what coils would hit your target.
I am no coiling expert but from what i have read some thicker wire (lower gauge) will help with more wraps and lower ohms.
Hope that helps a little.

 

[93gc40]

You can feed as many watts as it will take... Up till the point you exceed the limits of your battery and device or the coil melts. whichever comes first. You can feed 500 watts to a 2ohm coil, assuming your device and coil are built to handle it..

Use steam, design a coil that maximizes SURFACE area at the Temperature you desire while using 100watts.

 

[Vapey_McVape]

Do a dual 24ga build,

 

[edyle]

Do a dual 24ga build,

Kanthal A1
gauge ----- watt per ohm (per coil) for 200mW/mm2
34 ----- 1.4
32 ----- 3
30 ----- 6
28 ----- 10
26 ----- 23
24 ----- 45
22 ----- 91
20 ----- 182

Coil wrapping | Steam Engine | free vaping calculators

Yep that would work:
24 gauge : 45 watts per ohm

two one ohm coils combine to 0.5 ohm dual coil

here it is:
Coil wrapping | Steam Engine | free vaping calculators

10 wrap at 3mm internal diameter

 

[WharfRat1976]

24g, 10 wrap dualie at 3mmID...lemmeknow what atty you will stuff all that into

 

[MattyTny]

The sigelei 100w is a great box mod, a lot of people like them for the price. Make sure you are using good batteries like a married pair of Sony VCT 4s or LG HE2s or 4s. Next you want to understand the limits of the device and its "sweet" spot for resistance. Memebers mentioned steam engine calculator and you should check it out, it makes everything a lot easier to understand.

First go to the range tab and select your "APV" to see the device capabilities. Take note of the voltage limit of 7 and amp limit of 30. Then you'll see the two boxes "current limit 30A vs 100w" and "voltage limit 7v vs 100w. These boxes tell you the lowest resistance that uses all 100w and the highest resistance that uses all 100w. So now you have a flexible range for high power. Next you'll see optimal resistance. The description reads that the optimal resistance is measured by finding the middle of the range, then finding the middle between the median and max. This is only to use all 100w, you don't have to build for the sweet spot in the calculator. I would say build around the sweet spot and higher.

In the case you want to use all 100w you'll then just take your sweet spot resistance, put that into the coil calculator and manipulate the outcome with varying gauges and coil ID. I'd say use 24 gauge and a nice size ID. Since you're using a regulated and want maximize surface area just build on the higher resistance end of the range.

 

[edyle]

24g, 10 wrap dualie at 3mmID...lemmeknow what atty you will stuff all that into

Oh; good point.
It would fit on my 30mm magma.


Coil wrapping | Steam Engine | free vaping calculators
5 mm diameter is pretty big, but that works out to 7 wraps.

 

[Vapey_McVape]

24g, 10 wrap dualie at 3mmID...lemmeknow what atty you will stuff all that into

I fit a 24g 1.8ohm 5mm id in my lemo and right now have a .8 twisted 26 5mm id installed.

Doable