Cartomizer OHMS and Votage Matchup

[strprswpr]

My wife and I have been vaping a couple of different cartos. I like the 1.5 dual coils on my 3.7 GLV. She's been using 2.0 dual coils on her 3.7 Ego Batteries. My question is what to use when my 5 volt GLV comes. Do I go up to 2.0? I see so many different options out there. I've acquired a few different kinds of cartos. 1.5 Dual Coil, 2.0 Dual Coil, 2.6-2.8 Regular Cartos and also 3.4 Regular Cartos. Is it that the higher the voltage the higher the OHM? I tried a 1.5 Dual Coil with one of my Tobacco flavors and didn't like it very much, But I'm in love vamping peppermint at 1.5 Dual Coil. Is this confusing enough for you? Also, what with Boge 2.0? Everyone loves them.

 

[SteelJan]

It's the wattage at the coil(s) that make the heat that vaporizes the juice. So what you're currently vaping is 3.7V/1.5ohms = 2.5A. 2.5A x 3.7V = 9.25Watts. So, if you want exactly the same experience on your 5V GLV, it would be 9.25Watts/5V = 1.85A then 5V/1.85A = 2.7ohm cartos.

Then, going down in values from the 2.7ohm cartos, as you lower the ohms you increase the amps pulled from the battery, increasing the watts, meaning the hotter the temperature the juice is being vaporized at.

That's just the math of it, lol.

 

[strprswpr]

Now that finally makes sense to me....THANK YOU VERY MUCH...So what's the value to figure the amps? 3.7V/1.5ohms.....how did you get 2.5A?

 

[Wil]

Wattage = (Voltage x Amperage) / Impedence (Ohms)
Amperage = Voltage / Impedence

 

[permafrying]

have to consider also that the dual coils are splitting the wattage between the two coils so there's less of a chance of burning the juice or popping the coil because the power isn't concentrated into one spot. 1.5 ohms should still be fine on 5v. the ego also isn't 3.7v under load

 

[quaylon]

Easy way to get watts is volts times volts divided by ohms (volts squared / ohms)

 

[atomizer mizer]

I made this excel chart a few weeks ago. It should help. The link to the post where I explained how it works is below to.

View attachment Wattage ATTY(2).xlsx

http://www.e-cigarette-forum.com/forum/experiments-equipment/184714-excel-power-worksheet-voltage-vs-resistance.html

My wife and I have been vaping a couple of different cartos. I like the 1.5 dual coils on my 3.7 GLV. She's been using 2.0 dual coils on her 3.7 Ego Batteries. My question is what to use when my 5 volt GLV comes. Do I go up to 2.0? I see so many different options out there. I've acquired a few different kinds of cartos. 1.5 Dual Coil, 2.0 Dual Coil, 2.6-2.8 Regular Cartos and also 3.4 Regular Cartos. Is it that the higher the voltage the higher the OHM? I tried a 1.5 Dual Coil with one of my Tobacco flavors and didn't like it very much, But I'm in love vamping peppermint at 1.5 Dual Coil. Is this confusing enough for you? Also, what with Boge 2.0? Everyone loves them.

 

[strprswpr]

Nice chart, Thanks

 

[strprswpr]

So what about these Boge2.0's

 

[DonDaBoomVape]

FYI: I put this post together before quaylon came along.

I prefer the more direct formula – skipping the amps (temporarily), which can be calculated separately:

Watts (i.e., the intensity of the vape) = Volts X Volts / Ohms​

It boils down to the same thing, but is easier for me to get a handle on. To keep the same watts: as you increase your voltage, also increase your ohms. So an "HV" atomizer (i.e., an atomizer intended for high voltage mods) is actually high resistance.

The formula for amps (the current that fries attys) is:

Amps = Volts / Ohms​

Similar to the watts formula, but ohms (the atomizer resistance) have an even greater impact on current than on vape intensity. That's why HV (higher resistance) atomizers/cartomizers fare better on 5V and 6V mods than do LR attys/cartos on 3.2V or 3.7V.

I explore this further in this article (written by and for non-techies like me).

To answer your last question, the Boge 2.0Ω cartomizer on a 5V mod will generate 12.5 watts (probably too intense) and 2.5 amps (definitely too atty frying current). Stick with 3.0+ ohms: as much as 8.7 watts (very nice) and no more than 1.7 amps (atty is much more comfortable).

 

[bstedh]

have to consider also that the dual coils are splitting the wattage between the two coils so there's less of a chance of burning the juice or popping the coil because the power isn't concentrated into one spot. 1.5 ohms should still be fine on 5v. the ego also isn't 3.7v under load

+1
You would figure the wattage by using 3.2 ohms which is what each coil is rated at I believe. This gives you more vapor but generally not that much hotter. IMO you are getting a lot denser vapor so you are getting a lot more nic with each hit and that can increase the TH dramatically. It's just a completely different animal than vaping a single coil carto. Also the air hitting the second coil is kinda pre heated by the first so this changes the output vapor also so the standard wattage guide we use with single coil doesn't apply at all with the duals.

 

[DonDaBoomVape]

And a +1 to you, bsedh. Well put.

And I should have modified my comments to incorporate the points you and permafrying made about the Smok Tech Dual Coils. The amps generated by each coil are only 1.6 (coincidentally the same as the net ohms of the dual coil atty): nice and comfy for them. pbusardo provided a wonderful visual demonstration of this starting at the 14:15 mark in his review video.

​

Notice, however, that the Boge 2.0Ω carto failed much more quickly.

BTW, I believe that the dual coils are no kinder to the eGo battery's mosfet than a standard 1.6Ω atty or carto. Not an issue, of course, when we are talking about a 5V mod.