vivi nova rebuild question

[rum87mage]

Ok I am using [h=3]SMOKtech New VMax SS Stainless Steel VV 3.0-.6.0 APV Rev. 4[/h][h=3]GotVapes VISION ViVi NOVA™ 3.5ml V2.5 REBUILDABLE tank[/h]with the 2.8 ohm head
and 100% pg 24mg at
vaping at 5.3 volts

I'm new to rebuilding and i seen a-lot of videos showing how to do it on the 1.8 ohms, but can seem to find one that tells me how to wire a 2.8 ohm.

What I need to know is what size wire gauge and type of wire I need to get to rebuild it at 2.8 ohms. I know they say use Nickel chromium wire or Kanthal A-1. I don't know to much about the wire and am trying to find it on a roll of it i can buy. and how many time's would need to rap the coil to get 2.8 ohms? i know i pretty much would need to test it to make sure its at the right ohms.
Is it kanthal a-1 32 awg - 0.20mm or [h=1]Nichrome Wire 32 ga (0.20 mm) 30 ft (9 m) Nikrothal 80[/h]i need or am i looking at the wrong stuff. If u could type it out in a way so that I can look a roll up on ebay that would be great. or a link to the wire would be nice to.

next question is about the wick. the one video I seen the guy was talking about chemicals on some of the wicks. Is there any type of wick I need to make sure I'm not using to vape with? I was thinking about using fiberglass wicks cause from what I read they last longer then cotton wicks. what size fiberglass wick would I need for for my vivi nova tank. it has 3 little wicks on it now. would it be better to get one thick fiberglass wick or a small wick like it has and put 3 strands on it again. and what thickness would I need to buy.

Last question is can I use a mesh wick in the vivi nova? If so what kinda of mesh would I need to buy?

I have looked at so many differnt videos i got my self confused.
sorry for the noobie questions but any help will be greatly appreciated.

 

[dragonrage]

i am glad you got me looking fire wire and here is what i have found Nichrome Wire and you can get what ever gauge you want

 

[rum87mage]

hey thanks for the site would the Nichrome 60 (Chromel C) 10.6 ohms/ft 32 gauge .0080 work to make a 2.8 ohm coil. or is this to big what would be the best choice?


thanks again

 

[dragonrage]

i think we have to try and see what works best. i think i will order different ones and see if i can get 2.8ohm or higher

 

[Trela]

Hello there!

Kanthal or nichrome i believe is your preference. As for the amount of times it needs to be wrapped, i would say 3-5 would be a safe bet. I would wrap it 4 times and then simply test it with a multimeter. Trial and error until you get what you're looking for. Personally i would just try to replicate what i saw in the atty head that i was replacing and try to match that as close as possible.

this was a neat grid i found somewhere on this forum for determining what wire you need for you desired resistance

Kanthal Grade----- A-1 ------ A -------- D ----- Nichrome 60 -------- Nichrome 80

30 awg (?/in)----- 0.7 ------ 0.7 ------ 0.7 -------- 0.6 -------- -------- 0.5
31 awg (?/in)----- 0.9 ------ 0.9 ------ 0.8
32 awg (?/in)----- 1.2 ------ 1.1 ------ 1.1 -------- 0.9 -------- -------- 0.9
33 awg (?/in)----- 1.4 ------ 1.4 ------ 1.3
34 awg (?/in)----- 1.8 ------ 1.8 ------ 1.7 -------- 1.4 -------- -------- 1.4
35 awg (?/in)----- 2.3 ------ 2.2 ------ 2.1
36 awg (?/in)----- 2.9 ------ 2.8 ------ 2.7 -------- 2.3 -------- -------- 2.1

As for specifics on wicks or how to rebuild I can't really help as I've not had to rebuild mine yet, although because I'm bound to attempt it one day and I've gathered a bit of knowledge on the subject. I'm sure someone will be along to school ya.

If your refering to rockinrobbie's video he made on rebuilding vivi's i'm pretty sure he left a link to the cotton wick he used:

Amazon.com: Cotton Square Braid Candle Wick - #1/0: Arts, Crafts & Sewing

by chemicals what your looking for is a wick that is "unprimed" and "Lead-free". He suggests to boil it for a bit to make sure its as clean as can be because you're going to be taking whatever is on that wick into your body. You could go and find some other kind of wick, but by all accounts cotton gives better taste and as long as you keep it wet it should last long enough. Besides, you could always rebuild again with all the extra wickage you got.

As for the size and number of wicks, i would just go simple for your first rebuild and go for the mono. I believe multiple wicks would be just for the greater surface area around the tank, but I'd think would work just as well with just one. Same goes for length of the wick. I've read that you get a better draw with short wicks, but it's all up to preference.

As for Mesh, i haven't read or seen much about them, but from what i saw there's a lot more that goes into preparing it, and i don't believe that's the kind of wick they are designed for.

hopefully that helped

 

[Trela]

I've not ordered from here, but from LongHaul here on ECF:

http://www.e-cigarette-forum.com/forum/tanks/327906-cleaning-replaceable-heads-vivi-nova.html

he suggests:

for the nichrome wire:
Nichrome Atomizer Coil Wire

for the non-cotton wick:
Atomizer Glassfibre Wick

i would say is probably the cheapest place you can get the 'right' amount of materials for the job. Most other places you'd have to buy from would have you paying for larger amounts than may strictly be necessary.

 

[rum87mage]

Trela thank you so much for the detailed information. so just to make sure i'm reading it right 1 inch of 36 awg Nichrome 60 will be 2.3 ohms?
So would it be better sense in trying to get to 2.8 ohms to use the Kanthal Grade A-1 36 awg or the A? what do u think? and I will try out the cotton wick.

thanks so much for the info dragonrage and Trela

 

[Trela]

That's pretty much what i gathered from the grid, I think you're right. I wish i could find the original thread/post that i found that in to put it better context.

I'm curious, can i ask why you would want 2.8 ohms specifically? Could you not just dial the voltage down to get your desired wattage?

Also maybe you'll find this spreadsheet useful: http://www.e-cigarette-forum.com/fo...ur-battery-temperature-preferences-excel.html

However not knowing much about electronics I can't with any confidence suggest anything specific with the wire. I was kind of hoping someone would come in and teach us both a little something on the topic. XD

 

[rum87mage]

NichromeCalc
temp 2380 f
inches 1.5 any less ant it says melted
gauge 36
max at 6 volts
total resistance 3.375

at 5 volts
temp 2380
inches 1.25
total resistance 2.8125
says melted at 5.5 volts.

not really sure yet how many inches it will take but i know its kinda small

 

[rum87mage]

from what I have read i thought u needed a 2.4-3.0 ohm to vape at 5- 6 volts

 

[Trela]

For me a lot of this type of thing comes down to me having to try it personally and figuring it out through trial and error. The tricky part is finding people nice enough to guide you a little so you don't end up burning too much money trial-ing and error-ing the crap out of your bank account.

 

[Trela]

I've been using that wattage Spreadsheet as my personal Vape Bible to determine what voltage to set my VV to for the resistance tank i got. That says at 5 volts you need 3.2ohm+ to vape at 5v. at 6 its all the way at 4.50ohms

 

[rum87mage]

Nichrome Atomizer Coil Wire
the wire there on the site at one inch is 2.4892 ohms
at 1.25 inches its at 3.1115 is this right? and if so it i raped if 3-4 times like u said would i be ok to vape at 6 volts if i wanted to with out melting the coil?

 

[rum87mage]

im using 2 eFest IMR 18350 800mah ButtonTop 3.7v Rechargeable LiMn Battery

 

[Trela]

If you wrapped it up and installed it in the head and it then read ~3.1 ohms you would be safe up to 4.75 volts.

The correct wattage spreadsheet

from "atomizer mizer"

Assuming that 1.25 inches of that wire is 3.1ohms, then my issue with it is whether or not the rebuilt head as a whole would have 1.25 inches of the nichrome wire. If it has more or less it would change the total resistance.

Which is why i would suggest to rig it all up and test it directly with a multimeter instead of assuming length and using that in the calculation. While the coil itself may be 1.25 inches we aren't taking into account the rest of the wire that actually connect to the battery end of it. it may well be over 2 inches long in that case and completely through off our resistance calculations.

 

[rum87mage]

m using 2 eFest IMR 18350 800mah ButtonTop 3.7v Rechargeable LiMn Battery

with them both that 7.4 volts of battery power
=11.628 watts
=1.5713513513513513amps

with 36 gauge nichrome
1.35 inches = 3.105 ohms
at 6 volts thats
temp of 2600
and power required in watts is 11.628
current required in amps 1.938
so it wont vape at 6 volt highest i could go is

4.8 volts cause of the
current required in amps is 1.5402
the power required in watts is 7.39296
is this right?
how can i make the vivi nova really vape at 6 volts then ?

 

[rum87mage]

ok ill be back in the morning and will see how long it is and go from there i have to get going to work. thanks again for your help i really do appreciate your help. let me know if that math is correct there cause if it is then i think i understand a litte bit better now. but realy would like to know if maybe the best solution to get the ohms high enuff to vape at 5-6 volts would be to use the Kanthal Grade A-1 36 awg or would that be to much for the batteries to handle

 

[rum87mage]

so according to the chart it says i should be around 4.60 probably better off being 5.0 ohms tho the get a strong TH and nice vapor. but will the battaires work with a head that high? and in that case i would need a different kind of wire wouldnt i?

 

[Trela]

bumpin' for profit

 

[rum87mage]

am i right about this or am i missing something