Low Sub-ohm Safety

Status
Not open for further replies.

Vapinglatinogamer

New Member
Sep 27, 2015
4
0
28
I recently just built a coil reading .10 ohms and i like that number but i'm wondering what batteries would be able to withstand that power? I saw one of the charts posted on the forums but it seems Lg batteries are the only batteries that come close even though its labeled as caution. Should i use it on my Xcube II or could i use my hybrid mech mod?
 

dc99

Vaping Master
ECF Veteran
Verified Member
Aug 17, 2014
3,086
9,572
earth
http://www.steam-engine.org/ This site will help with your calculations. There is no single battery that can handle that load. 42amps. A dual battery mechanical yes but not a single. The XCube can handle that load but there is no reason to build that low on a regulated box. It would be a lot better to build around .4 or .5 and just turn it up
 

IMFire3605

Ultra Member
ECF Veteran
May 3, 2013
2,041
3,148
Blue Rapids, KS, US
Im still new to the vaping scene and ive seen a lot of things that say "the lower the better." So i shouldnt go super low ohms to get good clouds?

This is pretty much a falsity now. Back 18months ago, when the only way to blow clouds was with a dripper on a mech mod, yes lower ohms meant hotter coils. However, the highest output batteries for a mech out there are 30amp continuous discharge rate batteries, and these would be Sony VTC3, Sony VTC4, and LG HB6. At fresh charge of 4.2 volts, 30 full amps is in the 0.14 to 0.15ohms range, yet, that gives no room for safety margin if there is a dead short or a misfire, you will risk venting a battery sometime down the road.

On a mech, you really should not be build below 0.25, this gives some room for safety, and you do not cook your batteries as quickly. Now step forward into present day, no matter what most hard core cloud competition chasers will say with a mech, by calculations in Ohm's Law their such and such build is outputting 160plus watts, they are not taking mech voltage drop into account, most mods unless pure copper, silver, or gold will not give a 100% efficiency, at a 15% voltage drop, you are losing almost 15% of the watts Ohms Law Calculators guestimate. Side by side, a full copper mech mod next to a Sigelei 150watt regulated mod, the Sigelei will output far closer to its setting of max output than the single or dual battery mech mod just through sheer force of straight on voltage a Sigelei or regulated box mod throws at a coil to reach a set wattage, not just sheer amps that a mech mod does. Presently, the only reason IMO someone should be building below 0.2ohms is someone building a Temp Control coil on a TC mod, a 0.35 dual coil with 24awg wire on a Sig150w set at 120watts will give a more flavorful and larger cloud vape than a 0.25 22awg dual coil on a single or dual battery mech mod due to length of the coils and shorter ramp up time compared to the mech config.

Right now, as it stands, the only thing that almost safely fire that coil config of yours is a regulated mod that supports firing a 0.10 ohm coil, my suggestion from a safety stand point, tear that coil out and rebuild the atty above 0.30 at the minimum, this will fire safely on both your regulated when you want crank out the wattage and larger clouds and vape on a mech real well, won't be as hot on the mech and take longer to warm up but you are not putting yourself in danger, especially when just starting out rebuilding, for beginner builders I stress starting out even higher in the 0.8ohms minimum or higher.
 

Thrasher

ECF Guru
ECF Veteran
Verified Member
Oct 28, 2012
11,176
13,742
Madeira beach, Fla
Im still new to the vaping scene and ive seen a lot of things that say "the lower the better." So i shouldnt go super low ohms to get good clouds?
Unskilled builders think everything is directly related to ohms and coil resistance. So all they know is more power is better.

There is no real need to build that low, now if you use thick wire there is a chance you just cant get it up very high but thats for a box mod thread.

But real rebuilding takes into account things like amount of wire or mass, reaction times of coils, heat flux and power. And it is really a balancing act.

Built right, a 2 ohm dripper on an ego can fog up a room.
 

Jimi D.

ECF Guru
ECF Veteran
Oct 26, 2010
10,656
10,412
58
Florida Keys
Unskilled builders think everything is directly related to ohms and coil resistance. So all they know is more power is better.

There is no real need to build that low, now if you use thick wire there is a chance you just cant get it up very high but thats for a box mod thread.

But real rebuilding takes into account things like amount of wire or mass, reaction times of coils, heat flux and power. And it is really a balancing act.

Built right, a 2 ohm dripper on an ego can fog up a room.
But a .1 ohm dual build with a dual battery parallel box mod. Will fog up the house ! :D
 
  • Like
Reactions: Thrasher
Status
Not open for further replies.

Users who are viewing this thread