Question about vv / vw devices

[Steelgirl]

Hello friends... 1-1/2 yrs vaping and I never really paid attention to the numbers on any of my devices. As long as my vape tastes good, I'm happy. I usually vape at about 7 or 8 watts using Kanger Aero (1.5 or 1.8 ohm) and around 17 watts using the Kanger SubTank (.05 ohm) Well then the now debunked article from New England Journal of Comics reported the "junk" research, and I started looking at my read outs on my devices. The story (yes it was a story of epic tales) is that when one vapes at high voltage formaldahyde is emitted or ingested. It got me looking at my numbers on my various devices. 7.8 watts on IPV Mini is 3.6 Volts using Kanger Aero with 1.5 ohm coil; 17 watts on Sigeli using Kanger SubTank 3.3 volts with .5 ohm coil; 19 watts is 3.5 volts on Vapor Shark rDNA is 3.6 volts using Kanger Subtank with .5 coil; 3volts on iStick using Kanger Aero is 4.5 watts with 2.0 ohm coil.

This got me wondering because i was just reading someone elses post that he was vaping at 18 watts / 7 volts or something weird like that. How can my volts/watts ratio be so different then theirs? Is it the battery that makes it so much bigger difference? The coil ohm number? If I only had one device, I would wonder if I'm getting inaccurate info from it. But all are reporting closely rated volts vs watts ratio.

Not worrying, just trying to understand volts and wattages. Like I said, my vape is awesome tasting. Have not bought e-liquid in over 6 mos since i started diy-ing. I don't post often, but I do lurk often. I just like the pictures as the saying goes. Hopefully someone can clue me in on this question.

thanks...

 

[JRohrer]

The relationsip between Watts and Volts is determined by Ohms Law:

Take a look at this site to caclulate what the settings would be.

It is very common that devices do not put out the settings that they are displaying. Sometimes the only way to know what you are actually getting is to hook up a voltmeter to the device to see the actual output.

In the end though, it doesn't really matter that much in tanks. As long as you like the vape you're getting, and you're using safe hardware (not running .02 ohms on a 10amp battery) you're good.

 

[Ryedan]

This got me wondering because i was just reading someone elses post that he was vaping at 18 watts / 7 volts or something weird like that. How can my volts/watts ratio be so different then theirs? Is it the battery that makes it so much bigger difference? The coil ohm number? If I only had one device, I would wonder if I'm getting inaccurate info from it. But all are reporting closely rated volts vs watts ratio.

Not worrying, just trying to understand volts and wattages. Like I said, my vape is awesome tasting. Have not bought e-liquid in over 6 mos since i started diy-ing. I don't post often, but I do lurk often. I just like the pictures as the saying goes. Hopefully someone can clue me in on this question.

It's the coil resistance. Go to the Steam Engine battery drain calculator. Work with the two left columns only. Make sure 'regulated (APV)' and 'power regulation (VW)' are checked, enter say 8 watts in 'Power (wattage) setting'. Now look at what resistance is in 'Atomizer resistance' and then check the volts and amps at the atty under 'Atomizer – what hits your topper'. Now change the atty resistance and note the change in volts and amps. Change the watts and you'll see how that changes V and A also.

 

[Bunnykiller]

lets say you keep the voltage the same but vary the ohms of your coil... as the resistance drops in the coil, the watts produced increases....

for example: you have a garden hose with a spray nozzle on it, the pressure (volts) stays the same in the hose, as you squeeze the handle on the sprayer gently, a little water comes out ( the resistance is hi at the nozzle), as you continue to open the nozzle even more, the resistance drops and more water flows out of the end ( more watts)

 

[Ryedan]

lets say you keep the voltage the same but vary the ohms of your coil... as the resistance drops in the coil, the watts produced increases....

You're absolutely right with a VV mod Bunnykiller, but in a VW mod when you set 8 watts it doesn't matter what the atty resistance is, the power will always be 8 watts. What changes are the volts and amps output by the device.

 

[Steelgirl]

Very helpful. Thanks. I've looked at Steam Engine before... the Coil Wrapping section. I never noticed the other tabs for battery drain, ohm law, mod range, etc... Steam Engine makes it so easy to figure stuff out !! So, it is the ohms that makes such a dif. I just started using the sub tank. and the only mech mod I use is a Reo. And I always build 1.5 ohm. Been practicing safe vaping more by instinct and taste then by knowledge lol.