question about high voltage vaping on vivi nova.

[scoopbb]

Hi guys,

I just got an apollo vtube a few days ago. I have a vi vi nova with a 2.4ohm coil on it at the moment.

from reading the high voltage vaping sticky, i should use 4.9v to get 10 watts. 4.9^2 / 2.4 = ~10

i read somewhere else that using high voltage for the vi vi nova coils can blow them easier. Does anyone know if there is any merit in that? The vapor definitely seems hotter but i do hit it significantly less to get the same amount of vapor. Also, most of the longer hits at 4.9 end up tasting like crap, if i hit it for than like 3-4 seconds, it goes to poop. High voltage vaping also kills the battery quicker correct?

Anyone use the vi vi nova coils and care to share their experience.

 

[AttyPops]

V.N. coils are generally run cooler IMO. In other words... not all coils are the same, regardless of the math for watts.

So I tend to take it easy on them. That said, the other answers are:

Yes... More voltage = more stress for any coil. However, it also tends to vaporize juice more efficiently. So you may actually have fewer problems with it. Under voltage allows buildup and flooding. Too high = burnt. So you have to find the "sweet spot". That's what vv is about.

So... how high is high? I'd start low and work up until you get a good vape. That's the whole goal. Worrying about the other stuff becomes a bit counter productive after a while. Like over thinking it. As a general rule, the higher the ohms, the more robust the coil is since it has more wraps of coil/longer wire. The alternative may be to use thinner wire...which would burn out faster but IDK if anyone does that.

Re: Battery life. It depends on device design. Higher voltages are more efficient. However, on a booster device (with 1 battery) that's not always going to hold true. It probably will use it up faster even if you do hit it less but YMMV. Those using a twist have reported lowering the voltage helped battery life. OTOH...just get more batteries and have a good vape. Over-thinking again. Who cares about a 10% diff unless you are stranded in the desert with 1 battery to your name.....

BTW....I'm a bit of an analytical personality, so I don't mean to insult you or negate your questions...I've asked the same ones myself. I'm just trying to get you to relax a bit and make sure you get a good vape so this works for you. The point is to get it working well and fine tune later.

Also, the coil is also replaceable if you research it. That's what's cool about V.N. Also research cotton wicks if you like to read.

 

[scoopbb]

when you say the coil is replaceable you mean like the head/coil/wick setup right? not the actual coil on each head right? (i assume that is also, just significantly harder to do?)

i have a bunch of replacement coils for the future, just thinking about the now lol

 

[recidivus]

The main issue with Vivi novas and higher temps I've been reading (and experienced) is the rubber seal can burn/melt. When he says replacing the coil, he means opening it up and re-coiling your own. Rebuilding a coil is relatively easy to do, cotton wicks like it's going out of style (though it can burn quite easily if dry). The space to work with is quite limited, so I'm thinking shorts can be a common issue with popped coils even with stock heads.

http://www.e-cigarette-forum.com/fo...ystems/295410-vivi-nova-rebuild-tutorial.html

I personally don't use NR wire and haven't had major problems. One time I cooked it a bit too long and the rubber burnt slightly, but no long term flavour problems.

 

[AttyPops]

The V.N. 2.5 has non-resistance wire for the lower legs (at least on the 2.5 stuff I've used) so it doesn't melt the spacer.

I mean you can replace the wire/wick. You can also replace the whole head by buying replacement heads.

Also I edited above after re-reading and added info about battery life.

 

[scoopbb]

attypops, i appreciate your response. definitely not offended at all..

recidivus, thanks for that link. maybe something ill try to mess around with once these coils die.

 

[heater]

The V.N. 2.5 has non-resistance wire for the lower legs (at least on the 2.5 stuff I've used) so it doesn't melt the spacer.

I mean you can replace the wire/wick. You can also replace the whole head by buying replacement heads.

Also I edited above after re-reading and added info about battery life.

I want to wrap my own coils for my VN i had not given the plastic spacer any thought until now that you mention it. Any suggestions?

 

[gthompson]

10 watts!? All my juices taste like burnt motor oil anywhere close to that.

 

[AttyPops]

@heater: The tutorial in the link recidivus provided above talks about NR wire use.

Yeah, gthompson...I agree. 10 watts = too hot.

Note that HV not the same as high-watts. Higher voltage has oomph, however doesn't HAVE to be hot. Just use higher ohms. Also anything above 3.7 volts is considered "high".

 

[scoopbb]

this is the thread i was reading..

http://www.e-cigarette-forum.com/fo...e-wanted-know-plus-bit-electronic-theory.html

 

[AttyPops]

OK. Back in "the old days" we didn't really have VV... we had 5 volt devices. Fixed voltage for the most part. VV is common now. So you can actually talk about 4.8 volts or something. lol.

Basically, start low and work towards "the sweet spot". The math gives you a general idea. Most say that 7-9 watts is a good #. The V.N. coils, like mentioned, are also generally agreed to run on the cool side compared to others.

Another handy formula is V*V/R (voltage squared divided by ohms) = watts.

 

[scoopbb]

alright, with all that said, it does seem that 3.7v is the best place for me. never get dry hits or weird tastes.