Resstance vivi nova 2.5 (newbie)

[kurtcobain13]

Vapers, this is my first time to use vivi nova 2.5 why theres a different resistance? and what is the relationship to its battery.
i have a torpedo mod only. sorry sir newbie.

anyway thanks for help

 

[Azphat12]

The different resistances are designed for flexibility on what device you need them for.

If you have a standard 3.7v mod.... then you might want a 1.8 ohm or 2.4 ohm. A 2.8 would be a very very weak vape...but some people might want that..
If you have a variable voltage mod....then you can buy any ohm you want and then adjust your voltage accordingly.
If you have a variable wattage mod....then it really doesnt matter as the mod will auto adjust its voltage to whichever ohm your using.

Basically.... lower ohms on a 3.7v mod will give you a stronger vape. Some call them Low Resistance....
Normally you use lower resistance ohms on lower voltage settings. You use higher resistance on higher ohms. Generally....
And generally...using higher resistance and higher ohms will save your battery life a little.
Not that I normally notice...but I believe the formula states that the wattage ends up being lower or something... you can research that.

 

[kurtcobain13]

sir yes i have a 3.7v and what should i use? i have v2.5 vivi nova with 1.8,2.4 and 2.8 ohms.

and you said that i use higher resistance on higher ohms. i remember that ohms is a unit for resistance. so they are the same. am i right? correct me if im wrong please help

 

[natchez]

If you have a 3.7 volt device, start with the 2.4 ohms. If you want more of a vape switch it to the 1.8 ohms, less to the 2.8 ohms. Same advice as above, which is spot on. It is a personal thing as to how much you want out of the Vivi Nova.

The higher ohms, 2.8, are usually best with higher voltage devices, e.g. a 5 volt mod or a variable voltage mod. Do not confuse resistance and voltage. Basically, watts are the power that is going through the device.

Here is a bit of an illustration: 3.7 volts with 2.8 ohms = 4.9 watts (a somewhat low power setting for vaping); 3.7 volts with 2.4 ohms = 5.7 watts (enough to give you some decent vapor), and 3.7 volts with 1.8 ohms = 7.6 watts (a moderate setting for vaping). I use about 7 watts, which seems to work for me. But it is such a matter of YMMV. Just look up ohms law if you really want to understand more.

Just an aside, some of the Vivi Novas I have tried had higher resistance than the heads were labeled. So, you may end up with the head marked 1.8 delivering more like about 2.0 resistance.

 

[Azphat12]

If you have a set 3.7v then I would try the 2.4 first.

Basically, you have no way of adjusting your 3.7v....but you do have a way to adjust the ohm resistance.
So if you feel the vape is light...or not satisfying... go to a lower ohm....IE the 1.8ohm head.
If you feel that the 2.4ohm head is just too much....you would want to go up to the 2.8ohm to get a weaker vapor.

It is also good to invest in some type of meter (either a mod or an actual multi-meter) so you can test your ohm ratings before putting them on your mod. I have had Vivi Nova heads that the vendor had made (they recoiled them) and the head said 2.4ohms....but it metered at 3.1. Others have said 2.8ohms but actually metered in at 2.1ohm..

Always good to check. But a nice sweet spot would be 1.8 or 2.4 (or anything inbetween)

 

[kurtcobain13]

sir, how about burn taste? i use my vivi nova, but the 2.4 have less vapor. and 1.8 have a burn taste? what should i do to solve this problem?

 

[Azphat12]

2.4 will naturally have less vapor.... because it is working at a lower total wattage.
The 1.8 you can try a couple things...

Empty the juice (maybe empty into an empty bottle, or a syringe).
Take the top cap off so you can see the coils, and do some dry burns.
Just turn it on for a few seconds then off....see if you can see the coils light up red rather quickly.
There might be some left over residue on the coils. You can burn that off.
Just do not fire the unit for a long time...this can burn the wick. Short pulses is all you need.

Also test it with a multi-meter. Make sure you are getting 1.8 ohms.
If you are getting 1.5 or lower....it could be just to hot for the juice your using and burning it.

You can also inspect your wick...see if it is showing any signs of burning.
If it is the standard silica wick...you can sometimes get black marks on it...which if you dry burn...may come off and return the taste.

Having only a 3.7 mod your at the mercy of the head 1.8 or 2.4 unless you either get a variable voltage device or you learn to build your own vivi nova coils.....which is easy to do.

There are tons of things you can do to a Vivi Nova to upgrade them.
change wick to stainless steel, or cotton, or cheesecloth
increase the wick size by filing or drilling out the hole size of the wick area
recoil them with kanthal or nichrome yourself

Personally...I change mine to a U-shape wick of stainless steel mesh #500
Kanthal 32awg A-1

It vapes great... and since I recoil them myself I can get them to whatever ohm I want... usually I land in the 2.0ish range which my Vamo mod doesnt have an issue with.

 

[Azphat12]

Oh I should also note...

With the Vivi Nova it is very important to tilt the tank so the juice can swirl around the top of the wicks and help the juice saturate the coil area. With a 1.8 ohm head it does get a little hotter, and burns more juice. So if you are not tilting it here and there to help get the juice flowing...it could just be running dry and giving that burned taste here or there.

Some people forget to tilt the device...this could be a simple solution.
Otherwise, there are alot of things you can do to get the Vivi Nova working better.
Use the 2.4ohm head as your main head....until you can get the 1.8ohm working better would be a good idea too.
And if you are interested in trying to modify the head...maybe use the 2.8 ohm one to test with since your probably not going to want to use that on a 3.7volt device. If you got the 2.8ohm one that is....

 

[kurtcobain13]

thank you sir! it helps a lot

how about rebuilding it? it is possible the 1.8 ohms make 2.0 ohms? or the coil 2.4ohms can make lower? i hope you understand me.

 

[Azphat12]

When you are rebuilding your heads....the ohm stamp on the head doesnt matter.

You can take that 1.8 ohm head and turn it into a 3.0 ohm if you want.
When rebuilding the ohm is determined by what size wire you have, and how many times you wrap it (more distance = more ohms)

These are not accurate numbers...but just so you can understand the reasoning...

28awg Kanthal a-1 with 5 wraps might give you 1.0 ohm
32awg Kanthal a-1 with 5 wraps might give you 2.0 ohm

The reason is the 32 awg is thinner...therefore does not have as much resistance.
The thinner the wire....the more ohms you will get with the same amount of wraps.

In a Vivi Nova, I would recommend 32awg as it is pretty thin, and with about 4 wraps gets you into the 1.8 to 2.0 ohm range.

When you rebuild...you basically take the head off... pull all the wick and wire off and redo it all with your own materials.
Which can be purchased easily.

There are tons of videos on youtube on how to do it if your interested.

 

[kurtcobain13]

yes sir! thanks for the info. how about the wick? it does affect the resistance? example 4 wraps of of kanthal wire and 3 piece of 2 inches wick.?

 

[kurtcobain13]

sir how about the wick? does the length of wick affect the resistance? can i fold the wick then wrap it by kanthal wire?

 

[Azphat12]

The wick material does not affect the resistance really.
Unless you go with stainless steel... as stainless steel needs to be oxidized or it can short out.
If you use silica or cotton, then its a little easier to work with.

The only real thing to take into consideration is the size.
The thicker the wick...the more length will be used while wrapping.
This will make the ohms go up a little.

If you are making rather thick wicks..you might need to use 30awg.
The best thing you could do is find a website where you can buy small amounts of wire for cheap.
Maybe pick up 30, 32, 34 awg sizes in small foot increments.
Also maybe pick up a small amount of each size wick, or various silica or cotton types.
Might cost you a few dollars each.

This way you can experiment a little with wick sizes, and wire sizes until you get a ohm rating your comfortable with.
Once you find your sweetspot on wire size and wick size, then you can buy those only in a bigger bulk order and be good to go.

An alternative would be to do a youtube search and watch some videos about rebuilding them.
See what sizes they use that you might be interested in, and just buy those.

Either way, you can experiment some until you find what your after.

 

[kurtcobain13]

thanks sir! ))

 

[CaliGrower]

or you can get yourself a variable voltage mod and do like i did when i started out. start at the lowest coltage and work your way up in .1 notches until you find the best vape V/W for you.