Lower ohms, I don't get it (not sub ohm)

[SPACKlick]

So I usually vape on 2.1ohm coils, they read 2.1 or 2.2 ohms on my vtr (depends on how good the contact is, need to replace it...). I decided to buy a box of 1.8 ohm to see what the difference was.

I vape at 4.2 - 4.7 (4.4 average) volts with my 2.1's, So about 9.2 W (8.0 - 10.5 W). I popped in a 1.8, it reads at 1.8 and set the mod to 3.8V, pure burnt taste. I'm ok vaping at 3.7 but the coil doesn't seem to last very long. So I'm now vaping at 3.6 which is 7.2 watts but there's hardly any flavour and I can't turn it up without getting a burnt taste. Am I missing something?

 

[catlady60]

Personally, I vape on 1.5-1.8 ohms when I'm using my Bolt. I don't like subohming, so low resistance on a mech gives optimum flavor and vapor AFAIC.

 

[crxess]

It is not the lower resistance that causes burnt taste - Assuming same wattage output.
It is wick not keeping up. This has more to do with assembly of the specific coil having an issue than anything else.
I always recommend pre-wetting a new wick and taking a few primer puffs before firing up the mod.

It is also recommend to start a New wick/coil at a lower setting to be sure everything is working properly and gradually raise the power to your preferred level - As allowed be function.

 

[Miata GT]

On a regulated device such as your the resistance of the coils, everything else being equal, don't matter so much. On a fix voltage device, like a standard eGo or a mech mod you change the 'output' by altering the resistance of your coil build...and there is a whole 'nuther black art behind that as well.

As crxess mentioned the burny taste is due to your wicking material not being able to keep up with the heat of the coil. Using a larger diameter coil (usually at a lower gauge) at the same resistance will allow you to use more wicking material and crank up the power a bit more.

 

[inswva]

As noted, it largely depends on which atomizer/coils you are using. Many are incapable of wicking sufficiently at higher power levels. My Vivi Novas give up at about 8W while my BVC heads don't tap out until 14-15W.

 

[WattWick]

You may find this thread a good read,

http://www.e-cigarette-forum.com/fo...-not-matter-its-all-about-wire-temp-read.html

 

[AttyPops]

Yeah, well it's also about

1) Manufacturing variability (like...did you get a bad one, or have you tried several? Wicking issues too.)
2) How they get to lower ohms.

There's two ways to get lower ohms....1) Thicker wire. 2) shorter wire length.
I suppose you can use a combo approach too.

I used to buy the higher ohm atomizers on purpose. I had options of 3.x volt devices or 5 volt devices. I'd use the 5 volt and the higher ohm coils. Of course, now-a-days we have VV.

So you can wax on about it all you want mathematically, but you'd have to know what choices a particular vendor made in order to really drill into it. I'd guess that many of the larger mass-manufacture ones use the shorter coil method. Read that as "small glowing hot spot not very spread out."

I think the point about wicking is good too.

 

[WeirdWillie]

You may find this thread a good read,

http://www.e-cigarette-forum.com/fo...-not-matter-its-all-about-wire-temp-read.html

Although that is a good post, what was said is misleading
Watts do matter, in reality voltage is irrelevant
1 watt= 3.412 BTU/hr regardless of voltage applied
A 1 watt load with 4 volts applied will produce 3.412 BTU/hr
just as a 1 Watt load at 240v will produce 3.412 BTU/hr
Heat is what vaporizes your liquid
a BTU is the amount of energy required to change the temperature of 1 pound of water 1 degree Fahrenheit

Volts or voltage is electromotive force, the difference of potential that would drive one ampere of current against one ohm resistance.

That being said it is indeed poor wicking and or improper air flow in your atomizer of what ever reason that is giving you the burnt taste.
not your coil resistance or the voltage or wattage you are running.

Also there are misleading misconceptions that larger diameter coils and more cotton gives better vapes, this it completely BS
more coil surface area in contact with your wicking material will give you batter vape production (flavor/cloud) at any given voltage/amperage

Then come the factor of your wicking material capability of wicking at the correct rate (under or over wicking) under wicking will cause burnt taste, over wicking will cause flooding. can your wick effectively absorb and transfer your liquid to your coil efficiently ?
What affect wicking ?
juice thickness for one, the wicking material itself absorbancy rate, wicking restriction

I personally prefer to run smaller diameter, longer length nano coils with more heating surface area than larger diameter coils with less surface area at the same resistance, this allows me to vaporize more liquid at any given time at any given volts/watts because more of my saturated wick is in contact with the coils heating surface.
BTW I have never found a reason at least for my personal vaping needs to ever go below 1.5 ohms or higher than say 2 ohms on a regulated device.
I generally run around 1.5 to 1.8 ohms at 17watts 5ish volts my ideal vape zone YMMV.