Sub ohm newbie question

[spegtoast]

If I can get a burnt taste with a 1.8 coil wrap with my mech. How are you getting sub ohm delivery without a burnt taste?

Oops I think I just answerd my question. Correct me if I am wrong.... With higher resistance I am getting more heat causing the juice to burn? Need help here

 

[WattWick]

I'd go about it in the following order:

Make sure your atty is properly clean from any remnants of machine oil, etc.
Check if you have hotspots. No point even adding liquid before this is taken care of. Hotspots will taste burnt.
Check if your wick is wicking enough. Fire it for a couple of seconds, check if it's dry or not.

It's easier to help once we narrow down the source of your problems.

... and, before you're thrown to the lions, make sure you use adequate batteries of the IMR kind.

 

[UncleChuck]

Typical stuff like clearos, disposable attys, cartos, etc use very thin wire. With lower power levels this works better because you need less power to get the coil up to temperature.

Sub-ohm builds are usually done with 28ga (or thicker) wire, which is much thicker than the wire used in standard equipment. Because of this, there is a lot more surface area, and even at much higher power levels the coil doesn't overheat and burn the juice. That's assuming a proper build obviously, with subohm builds you need to pay even more attention to get proper wicking, if not you can still burn juice.

So, plainly, the wire is thicker with subohm builds, so the coil doesn't overheat the juice.

 

[LucentShadow]

If I can get a burnt taste with a 1.8 coil wrap with my mech. How are you getting sub ohm delivery without a burnt taste?

Oops I think I just answerd my question. Correct me if I am wrong.... With higher resistance I am getting more heat causing the juice to burn? Need help here

By that logic, you should go for the lowest resistance possible, to reduce the heat...

Or, NOT! That's quite backwards! Sorry to be very blunt, but it's pretty basic stuff, in vaping, to know that lower resistance coils get hotter than higher resistance ones.

If you are considering that path, I'd suggest doing some basic research on RBAs, simple electrical circuits, and battery safety before trying sub-ohm builds. Here's a very small start:

Ohm's law - Wikipedia, the free encyclopedia

amps = volts / ohms

watts = volts * amps

Power (watts) applied to resistance wire equals heat. Less resistance means MORE heat. This heat can certainly be affected by the physical properties of the coil. Smaller and/or closer wraps equals quicker heating, for one.

You need better juice delivery to the coil, and possibly better airflow, if it's tasting 'burnt'. Could also be a poorly-made coil, as mentioned.

Good luck.

 

[spegtoast]

Yes I have spent enough time on here to know all the safety.

Yeah, got it MR Blunt!

I am using 32g wire and havent yet tried wrapping a sub ohm. UncleChuck called out that I may be using disposabled ect. That is correct. Using any premade delivery device at 1.8ohm I can get a burnt taste when I increase V or Watts with my Vamo. It seems odd to me that using a lower resistance you wouldn't get that burnt taste even quicker.

 

[Blix]

It's not really that odd, with a good RBA/RDA you make sure you have a good coil and wick setup that can deliver the juice to the coil quickly enough to not run dry and get a burnt taste.

In a small clearo made somewhere in China there's little room, and the setup is often with coils too tight around the wick.

 

[UncleChuck]

Yes I have spent enough time on here to know all the safety.

Yeah, got it MR Blunt!

I am using 32g wire and havent yet tried wrapping a sub ohm. UncleChuck called out that I may be using disposabled ect. That is correct. Using any premade delivery device at 1.8ohm I can get a burnt taste when I increase V or Watts with my Vamo. It seems odd to me that using a lower resistance you wouldn't get that burnt taste even quicker.

It's really just a matter of surface area. Thicker wire has more surface area, which means more area to dissipate heat, by giving the heat to the juice, and removing it from the coil as it turns into vapor. With thinner wire there is less surface area, so the coil can't get rid of its heat as well. Which means it builds up until it's too hot and burns your juice.

If you plan to get into subohm ditch the 32g, even 30g coils at roughly 1 ohm can get pretty close to burning juice in my experience. 28ga is really the best starting point for subohm, some people get 27 or 26 ga as well. I've noticed 28g starts to get too hot around .6, under that and 26ga works great. But 26ga over .6 seems to take too long to heat up.

One more thing with subohm is that most people have a lot of airflow, this helps to cool the coil a bit, but it's mainly the thicker wire that allows you to vape at high power without burning, wire is a huge part of it. .7ohms with 28ga will give a good vape, .7ohms with 32g and you'll likely pop your coil and/or set your juice on fire.

Its kind of like how you can get 1,000hp out of one motor without issues, but blow a different motor trying to get 300hp. It's all in the setup and hardware.

 

[Blix]

Great points UncleChuck

And yup, I have close to 300 feet of 28awg, It's almost all I use.

 

[spegtoast]

Thickness of the wire is something I have overlooked during my research. Thanks for the easy read, and great points guys. Now back to ebay for some 28g before I attempt this. I still cant see how poeple could possably use a clearo on a mech with a fresh battery, but I may be just beating a dead horse here. I will let your advise sink in a while.

 

[dr g]

Wider gauge coils take more power to heat up AND have larger interface area with wick/juice to transfer heat away from the coil. That is balanced with the generally increased amperage through the coil.

 

[PinoyBoy]

If you plan to get into subohm ditch the 32g, even 30g coils at roughly 1 ohm can get pretty close to burning juice in my experience. 28ga is really the best starting point for subohm, some people get 27 or 26 ga as well. I've noticed 28g starts to get too hot around .6, under that and 26ga works great. But 26ga over .6 seems to take too long to heat up.

Does twisting the wire help in this case? I have 30g coils and I want to try 0.5 ohm. Sorry if my question deviates abit from OP's topic.

 

[SissySpike]

You have to do more than just wrap a low ohm coil if you want to enjoy the vapor produced. You have to supply enough wick, juice, and air to avoid the burnt taste.

 

[tj99959]

You have to do more than just wrap a low ohm coil if you want to enjoy the vapor produced. You have to supply enough wick, juice, and air to avoid the burnt taste.

Finally!!

Air flow is as important as resistance, especially when you go sub ohm. Without enough air flow sub ohm is about like putting a lit match in your mouth.

 

[dr g]

IMO airflow is far more important than resistance! But another thing that's important for making big clouds is adjusting nic down. A lot of the burn of subohm is caused by the huge increase in nic (i.e. it's excessive throat hit). You are going to want to lung a large volume of air so don't be afraid to come down. When you are starting out it might even be good to go to 0, so you can tell whether you're getting burn or if it's a nic effect.

 

[dr g]

Does twisting the wire help in this case? I have 30g coils and I want to try 0.5 ohm. Sorry if my question deviates abit from OP's topic.

Twisting does help.

 

[JUDGMENT AFFIRMED]

Great points UncleChuck

And yup, I have close to 300 feet of 28awg, It's almost all I use.

I made my first stainless wick and 30 gauge coil on May 3rd - NOT sub ohm - and am still using it today. At 1 inch of wire a month, that 100 foot roll should last me 100 years 8-o

 

[inter_ceptor00]

And in many cases ....aren't you guys using things like multiple wick/coil setups to achieve regular resistances but with more surface area?

2 1.6ohm wick/coils in one device make a combined .8ohm resistance to the battery.
4 3ohm wick/coils in one device make a combined .75ohm resistance.

 

[volume control]

Threads like this scare me. You really should do a lot more reading on HOW electricity works, ohms law, and battery safety before you just start twirling up subohm circuits. Thats like putting someone with their learners permit in a nascar

 

[dr g]

Most VV devices are subohm circuits.

 

[volume control]

Most VV devices are subohm circuits.

Explain, because this statement makes absolutely no sense. If the VV circuitry was subohm your battery would get hot from just turning the device on, not mind actually firing an atomizer