How to determine optimal voltage and/or wattage based on resistance when using an VV/VW Device.

[tmbridge]

Hi guys,

I recently (last week) upgraded from my eGo-C Twists to a Vamo. However, I'm 100% sure on how to choose what voltage or wattage I'm vaping at. I usually keep it lower ( less than 4 ) with any resistance (1.8-2.8). Anything higher than that and I often get that burnt taste.

My question to y'all is: is there a way to mathematically determine the optimal voltage/wattage or is it purely preference-based? I don't understand why the Vamo would offer up to 6 volts when anything above 4 tastes burnt.


Any opinions?

Thanks,
Tim

 

[indianajames]

There's actually a chart showing all of that. (I have it but think it's too big to put in the post. Google "vaping power chart".)

I'm no expert, but I think most people just adjust to taste.

 

[jhiga]

It's pretty much always going to be performance based.
When using a 3 - 4 ohm atomizer, you may need to vape in the 5-6 volt range.
Check this out: Ohms/voltage chart

 

[LongDraw]

Using ohms law you can determine the wattage you are at based on the volts you are using and the resistance of the coil. I believe the formula is Voltage multiplied by Voltage divided by resistance. So an atty at 4 volts and a 2ohms would be, 4 x 4 divided by 2 equals 8.

There are online calculators and phone apps that can make it easier. I have seen one poster mention that adding 2, to whatever your resistance is give you close to 8 watts. I have tried this out and it does seem to be pretty accurate.

As far as where to vape at, that does seem to be personal preference. I have seen some say fruits and such work best with lower wattage and tobaccos at a higher wattage, though that range would be dependent on you. Personally I find I like many juices at 8 to 9 watts, and some fruits 7 to 8 watts.

I believe that the variable voltage devices go so high for those who want to use high ohms, like 3.5 and such.

 

[Renzuli]

Welcome , and you could use ohm's law , but that really doesn't work in the real world . First off , make sure your Vamo is set to RMS , not Means , that's the most accurate setting . As a rule of thumb , I use 3.7 voltage with atty's and carto's under 2.ohms , 4.2 volts for atty's carto's at 2.2 to 2.4 ohms . For 3 ohms , or more from 5 to 6 volts . But on the Vamo , it's better to use the wattage , instead . Put on any atty or carto , start the wattage at say , 4 watts . Try it , too weak , crank it up to 5 , then 6 , then 7 watts , etc until you get the taste and vapor you like . Then with your wattage set to your preference , you can put on any ohm resitance device , and the Vamo will self adjust the voltage , for you , to vape at your prefered wattage . My wattage is set to 8.5 watts . So it's really up to you , to find what wattage you like . And if yourgetting a burnt taste , it could be a lot of things , not just too much voltage . It could also be the device itself . Too much VG ( thick ) and doesn't wick very well . Etc , etc . Good Luck . With a bit more time , all this will come very easy to you . You just have to invest in a little time , and trial and error , till you find what works for you .

 

[The Ocelot]

The chart is really just a ballpark figure. You need to pick a voltage and experiment going up or down depending on what tastes good to you. By trial and error I've found I like different juices at different watts, and sometime I don't like the same watts for the same juice if it's in different toppers.

 

[wv2win]

Many of us who have been doing this for a while want a good throat hit and warm vapor. With attys or cartos in the 2.8 ohm range, I vape in the 4.5 - 4.7 volt or 8.5 watt range. With 1.5 ohm dual coil cartos (equivatent to 3.0 ohm single coil) I stay around 4.4 volts or 12.3 - 12.5 watts. I never get a burnt taste or burnt liquid.

If you like cold vapor and weak throat hit, then stay in the 3.7 volt or 7.5 watt range with 2.5 - 3.0 ohm single coil cartos/attys.

 

[aikanae1]

Many of us who have been doing this for a while want a ...

That's important. Tastes and desires do change as time goes on. I think that's the primary reason for upgrades.

 

[jhiga]

The chart is really just a ballpark figure. You need to pick a voltage and experiment going up or down depending on what tastes good to you. By trial and error I've found I like different juices at different watts, and sometime I don't like the same watts for the same juice if it's in different toppers.

Correct. With some liquids, I like to push my voltage high, but some need to be cooler.
Of course, that's just my preference. Others may find different results suit them best; the chart gives you an idea of where to start.

 

[zapped]

No chart needed.

Find your resistance and add 2 to it.

2ohm atomizer + 2 = 4volts

1.8ohm heads + 2 = 3.8 volts

This will get you very close to 8 watts which is the average range for most people.

You can fine tune it up or down from there depending on your device and individual taste.

 

[EddieAdams]

There's so many variables imo. Type of liquid, atty, how well your wick is wicking, .... comes down to trial and error if you ask me. I build low resistance atomizers for a friend who doesn't have a vv mod for EVOD. 1.8-1.9 ohms generally and they work great at the 3.3v the ego c upgrade battery puts out. At higher voltage they tend to burn off liquid faster than can be wicked. Leading to a dry hit after a couple puffs.
I prefer standard2.5 ohms, maybe even a little higher . Have that on my agat at 9-10w and EVOD heads at 8-9w and get clouds of flavorful smooth vapor. I don't know everything but,I know what's worked for me...

 

[Beccca]

When you change the watts on a vamo, how do you SET it?

 

[wv2win]

When you change the watts on a vamo, how do you SET it?

Just press the + or - button to the desired wattage number and it is SET. Make sure you have it in RMS (no2) mode.

 

[Beccca]

Thanks alot Wv 2 win!

 

[wv2win]

You're welcome. I didn't get my VAMO from Tropical Vapor but they do have a pretty good instruction sheet on their web site.

 

[jasl90]

Hi guys,

I recently (last week) upgraded from my eGo-C Twists to a Vamo. However, I'm 100% sure on how to choose what voltage or wattage I'm vaping at. I usually keep it lower ( less than 4 ) with any resistance (1.8-2.8). Anything higher than that and I often get that burnt taste.

My question to y'all is: is there a way to mathematically determine the optimal voltage/wattage or is it purely preference-based? I don't understand why the Vamo would offer up to 6 volts when anything above 4 tastes burnt.


Any opinions?

Thanks,
Tim

Is there a way to do it mathematically??? Yea of course there is... If you like math more than vaping.
The fact is there a lot of variables that can come into play, that go well beyond "use this voltage with this resistance".
For example, a 2 ohm dual coil requires more power than a 2 ohm single coil... The reason... The dual coil is two, 4 ohm coils in parallel... So that's 4 times the amount of wire that needs to be heated.

If you're using off the shelf atomizers, take Zapped's advise... Add 2 to the ohms, as a starting point, and adjust to taste. If that's not technical enough, look into the charts people have mentioned.

If you're getting into RBAs with heavy gauge wire, throw those charts out the window. They are based on commercially made attys made with much thinner wire.

 

[jhiga]

If you're getting into RBAs with heavy gauge wire, throw those charts out the window. They are based on commercially made attys made with much thinner wire.

The charts still give you a ballpark range to start in even with low gauge wire when building RBA's. You still (should) know the resistance on the RBA.

 

[jasl90]

The charts still give you a ballpark range to start in even with low gauge wire when building RBA's. You still (should) know the resistance on the RBA.

I agree 100% that you need to know the resistance of your coil. My point was that two coils of the same resistance can be made of two very different gauges of wire. The coil made from the thicker wire will require more power to reach a given temperature that the coil made with thinner wire. All of the charts, that I've seen, appear to be based of commercial, off the shelf, attys that use thinner wire. I've never seen a chart that shows 20 watts in "the green zone"... But... There are plenty of folks on this forum who are happily vaping away @ 20+ watts on 28awg SLR setups.