Help me understand something...

[puddinman]

I'm not quite sure what the difference is between operating in VV vs VW is. a worker at a B&M said I'll get more "performance" out of VW mode ... But in my mind Ohm's law rules. If I run my Atlantis .5 at 4.2 volts, that's 29.4 watts. I understand that I can up watts a bit without affecting the voltage reading (maybe it affects it beyond the decimal places the istick 50 can display?) but am I theoretically squeezing any more performance out of the coil? I'll be honest and say that it only makes a difference when the wattage reaches the borderland between one voltage output and the next and even that seems to be very minor.

I hope that makes sense. IOW, if I like the vape at 4.2 volts, then am I actually gaining anything by upping wattage without changing voltage? My initial experiments tell me "not really," but the science part of my head wants a better answer. Maybe I'm missing something?

 

[InTheShade]

It really makes no difference. It's like reading your speedometer in KPH rather than MPH - you're still going the same speed and the laws of physics still apply.

Set it where you feel comfortable and don't worry about the small differences in displayed wattage / voltage.

I challenge most vapers to tell the difference in fractions of watts or volts - the vape will be so close that it can be called equal.

 

[Matty316]

Voltage mode is like a manual mode you use a voltage fixed by you that won't change no matter what the resistance of the coil so the "power" watts given will be voltage squared, divided by resistance of the coil. If you want to vape at a specific Wattage you need to use ohms law to work out the voltage needed.

In Wattage mode its like an automatic mode you set the watts you want and the chip will do the calulations for you and set at appropriate voltage for the resistance to achieve the wattage you set.

 

[ShariR]

From what I understand about vv and vw devices:

VV, variable voltage, you set the voltage you want. You need to know the ohms of your coil and most people adjust the voltage to 2 higher than the ohms to start and adjust voltage up or down depending on taste. If you change attys and put one on with a different ohms you need to reset voltage.

VW, variable wattage, you set the watts for the heat/flavor you want. The ohms of the coil will determine at what voltage the device will fire. You can change attys and the watts will stay the same even if the ohms of the coil are different.

Of course, you need to stay within the parameters of ohms law.

This is a constant topic of discussion here. Some people prefer setting watts, some prefer volts. I have read discussions that some find watts more accurate because they say you can more finely tune your vape. Plus it makes changing toppers easier without having to reset volts all the time if you vape a range of coils with different ohms.

Hope this made sense.

 

[ckquatt]

To be honest, I never use wattage mode on the mods that have it (Provari, and istick) I know what voltage I need for whatever coil I happen to be using and set it there.

I use the "double the ohms number to get the starting point for voltage" rule. (2.0 ohm coil = start at 4.0 volts) The wattage number just falls where it does.

Edit to add: I'm running two different attys on my P3 right now. A 2 ohm ibtanked carto at 4.2 volts and 8.something watts, and a Kayfun Nano with a 1.3 ohm coil running at the same 4.2 volts and the wattage changes to 14.8 watts. Adjusting volts is just easier for me.

 

[stevegmu]

I just vape by taste...

 

[Nomoreash]

It's two different ways of adjusting the power, there is no performance difference either way if you're comparing the same wattage.

You're adjusting the power level/wattage no matter which way you do it and VW is a simpler method to most because it accounts for the coils resistance. If adjusting by wattage 20w is 20w no matter what ohm coil you put on it. If adjusting by voltage and it's set to 4.5v with a 1 ohm coil that's 20w, if you change to an atty with a 1.5ohm coil you'd need to adjust it to 5.5v to get 20w.

 

[Nomoreash]

I just vape by taste...

Ding Ding we have a winner, I wish everyone would practice this and quit getting hung up on numbers. Start low and move up until you find the sweet spot. Less complicated and comparing numbers is meaningless, to many variables to take into account.

 

[The Ocelot]

I vape by taste as well. Too warm, turn it down; Too cool, turn it up.

 

[puddinman]

[

I just vape by taste...

Ding Ding we have a winner, I wish everyone would practice this and quit getting hung up on numbers. Start low and move up until you find the sweet spot. Less complicated and comparing numbers is meaningless, to many variables to take into account.

Taste was my approach as well. But then this dude goes and tells me that "wattage mode is better performance," and it got me to thinking. I guess he probably meant along the lines of fine tuning as mentioned above. But I'd wager in a blind test he couldn't tell the difference between 15.2 and 15.3 watts -or even 15 and 16 watts.

Some of this is starting to sound like extreme audiophile territory..."Demagnetizing my CD opened up the soundstage tremendously and allowed me to hear the breathing of the dog outside the studio."

 

[BigCatDaddy]

Voltage mode is like a manual mode you use a voltage fixed by you that won't change no matter what the resistance of the coil so the "power" watts given will be voltage squared, divided by resistance of the coil. If you want to vape at a specific Wattage you need to use ohms law to work out the voltage needed.

In Wattage mode its like an automatic mode you set the watts you want and the chip will do the calulations for you and set at appropriate voltage for the resistance to achieve the wattage you set.

Yup, that's it!! Watts all the way!!

 

[r77r7r]

If I ran out to the store and my topper went a little wacky, I'd want Watts.

If I was home and the topper went wacky I'd want volts so I'd notice and change it out.

Are there any devices that allow setting the voltage in different increments to each other?

I really don't see the difference, if not, in reaching a certain place.

Is any of this going to be relevant when we all go TC?

 

[The Ocelot]

Are there any devices that allow setting the voltage in different increments to each other?

I'm confused by this question.

 

[tj99959]

If I ran out to the store and my topper went a little wacky, I'd want Watts.

If I was home and the topper went wacky I'd want volts so I'd notice and change it out.

Are there any devices that allow setting the voltage in different increments to each other?

I really don't see the difference, if not, in reaching a certain place.

Is any of this going to be relevant when we all go TC?

I've been using TC since I started vaping (2011)
If it's to hot I turn it down, if it's to cool I turn it up. (Works every time)

 

[ckquatt]

Taste was my approach as well. But then this dude goes and tells me that "wattage mode is better performance," and it got me to thinking. I guess he probably meant along the lines of fine tuning as mentioned above. But I'd wager in a blind test he couldn't tell the difference between 15.2 and 15.3 watts -or even 15 and 16 watts.

Some of this is starting to sound like extreme audiophile territory..."Demagnetizing my CD opened up the soundstage tremendously and allowed me to hear the breathing of the dog outside the studio."

I agree. Everything I use on my Provari (2 ohm carto, 1.3 ohm Kayfun, and 1.3 ohm Subtank Mini RBA) all run beautifully at 4.2 volts! I never change my settings. I found my sweet spot and last it alone.

On another note... I had no idea what you were talking about when I read about CD demagnitizing so I had to look it up!! You guys have to read the first two posts on this site! Its the most BS filled post I have EVER read!! Then the second post is just basically saying if you noobs or "illiterates" don't agree with me to GTHO!
CD DeMagnetizing | Stereophile.com

What this imparted to the signal reproduction was a seeming reduction in transient hash, softer dynamics, a slightly more open acoustic and a slightly more warm sound. Rhythmic drive was as stable as before, but seemingly softer in 'hardness' of overall drive (hashy edges where lessened in value or intensity).

 

[TFL!]

Are there any devices that allow setting the voltage in different increments to each other?

Short answer is NO

 

[r77r7r]

I'm confused by this question.

That's because I'm posting too early

I meant- can you adjust one or the other in different increments relative to the other? Can I make finer adjustments using one or the other?

Still too early....

 

[The Ocelot]

That's because I'm posting too early

I meant- can you adjust one or the other in different increments relative to the other? Can I make finer adjustments using one or the other?

Still too early....

Okay, I understand the question, but it's too late for me to answer clearly. The increments in earlier device were .1 for voltage and .5 for wattage, which came out to be about the same. However, I just noticed that my P3 adjusts wattage in .2 increments. I'm not sure why, since I can't imagine anyone would be able to tell the difference between 15w and 15.2w.

 

[Matty316]

That's because I'm posting too early

I meant- can you adjust one or the other in different increments relative to the other? Can I make finer adjustments using one or the other?

Still too early....

I suppose it depends on the mod. I think most give you the option to adjust both watts and volts are adjustable in 0.1 increments. Depending on the resistance either one could give a finer adjustment.

 

[tj99959]

It still boils down to thermodynamics. It's easy to make 8 watts and 80 watts taste exactly the same if you understand thermodynamics. The only difference between the two should only be the quantity of liquid vaporized.

So think about the coil temperature and AFR that you want instead of worrying so much about volts & watts.