ohms???

[AttyPops]

As a general rule... it's best to use SR stuff with the VV mods...gives you more range to play with. Otherwise, if you use LR stuff you end up bottoming-out the voltage and have little "play room".

Some coils seem to run cooler. Remember there's a wade range of "acceptable tolerance" in coil ohms too. We're not even getting into the surface area part of the equation. So....real world experience from most vapers is that the majority appreciate the higher "wiggle room".

That said, there are still a lot of vapers that use LR stuff for some reason that I can't understand. I'd shoot for around 2.5 ish +/- ohm stuff. YMMV.

 

[Vapoor eyes er]

so on an ego twist, would it be best to use 1.8 or 2.0 resistance for the vivis?

I've found the best ohms for the Twist is the 2.4 a it allows a wider range of voltage. Install the 2,4 ohms head and dial in low voltage...dial up the voltage until you've hit your "sweet spot"...the "sweet spot" will vary with different juices. I'm @ 4.2 volts on 2.4 ohms head. Hopefully you have the LONG wick Vivi as the short wick Vivi have wicking problems. Short wick you have to tilt the tank every so often to saturate the wicks. Also the Vivi heads need cleaning/ washing every so often. I clean mine every 2-3 days with dark juice and once per week with light juice.

so on an ego twist, would it be best to use 1.8 or 2.0 resistance for the vivis? i have to confess that the only difference i'm noticing with the vv control is a bit of a burnt taste so far, and i'm thinking it's because i'm using the "stock" heads that come with the vivi nova minis (2.4 i think).

also, whenever i use the stardust or t2 type clearos, i end up getting a burnt taste as well after the fill line depletes from the top. any ideas?

thanks in advance!

 

[shantyshaker12]

BurnZ, the simple answer is as a couple of others have suggested, the 1.8 ohm is the best fit for your type of battery. I use the same type of battery, and that is what seems to give the warmest vape with the best throat hit. My 2 cents.

 

[DanDC]

Ohms = Amount of "electrical friction".

So low ohms = less friction slowing down the flow of electricity = hotter.

They actually call it "resistance". The degree to which a material resists electrical flow. It's the value of a "resistor" in electronics and really everything else (all other parts/components) has some resistance too.

Note a handy formula for vapors: Voltage Squared divided by ohms = watts. Watts = V*V/R

So if you know the voltage of the device, and you know the ohms, you know the watts. Shoot for a value in the 6 - 9 range. Varies depending on devices and your preference.

How can lower ohms mean a hotter coil at the same voltage? I know that is the case, since the power (watts) is higher on a 1.8ohm coil at 3.7v than on a 2.4ohm but it just sounds so counter intuitive, after all we use use no resistance wires or double up the coil's legs so they don't get so hot.

 

[fourthrok]

I use 3.7 volt stuff mostly. Primarily (right now) the 3.7 Gripper ..I use a 2ohm single coil on that one, and the eGo T Mod. With the latter I mostly use the "regulated" mode, or standard eGo volts of around 3.4 volts under load. I vape a strong menthol, and like my vape cool, but with a solid throat hit and lots of vapor. BUT...I'm a moody person. Early in the day when I'm more alert and not stressed I like to use the 2 ohm single coil on the eGo T Mod. As it gets later, and I get more frazzled and want a harder hit..I switch to 1.7 ohm single coil.

I've used 1.7 ohm SC on all my eGo equipment ..including knock offs like kGo which has a higher voltage rate...with no problems.

Ballpark "guidelines" (NOT a rule!!) is that lower ohms want lower voltage. Higher ohm...like 2.8 to 3...or higher...want higher volts.

 

[tj99959]

The premise behind all this electrical stuff that we do is actually simpler than many think. 'If it's good .. vape it, if it isn't .. change it'. When we need to change it, we can either change the voltage or the resistance in order to change the wattage. A specific wattage being the end result that we are trying to achieve. Where the whole thing becomes dicey is the fact that you probably don't like the same wattage that I do. So each individual needs to find the wattage that is perfect for them. Once you know what that value is the whole volt-ohm stuff becomes a no brainer.

 

[pman5kmo]

How can lower ohms mean a hotter coil at the same voltage? I know that is the case, since the power (watts) is higher on a 1.8ohm coil at 3.7v than on a 2.4ohm but it just sounds so counter intuitive, after all we use use no resistance wires or double up the coil's legs so they don't get so hot.

Lower resistance means more power can efficiently pass. Since a coil is not a demand divide (that is it has no control of power, the switch in the unit is the demand device) it is limited to what the switch supplies. If you have a resistance, that will regulate maximum current.

Think of electricity as a plumbing system for a fountain. The pipe size is your voltage, the pressure is your ampage, watts would be GPM of water. A watt is a watt no matter watt voltage it is supplied, just the same as a gallon of watter is a gallon of water no matter the pressure supplied. Ohmage would be the interaction of the interior pipe surface, changes in pipe size (just like how wires and all components have some resistance) or like a pierced disk to reduce water flow (this is what would be the Ohmage of your atty/cart) the higher the resistance the less it allows power to flow through. This is why heating coils are made up of such thin wire coiled the way bit is (if any coil wire touches other coil wire it won't heat up nearly as much). It simply means more power gets to the coil.

Electronic resistors work in the same principle, and the result is always heat... which is why ac-dc adaptors get warm.

Smaller batteries drop voltage quicker. A 350 math battery will start around 4.2v (li-ion... some us lipo which runs 3.4 when charged down to 2.8-2.9 at full healthy discharge and end around 3.2-3.4. A 2 ohm cart gives you a starting power of a little over 8w. Ending you can be down around 5w... and when Vaping that difference you can taste, smell, and see...this is why VV and low wattage devices came about. It improved everything. With vv you can use whatever Res you want but you are reliant upon the max amperage the switch will supply.

Mech switch units rely upon the resistance as a safety... if therw was no rwsistance you would have a battery short and thus heating (resistance increases with heat) till either a lead or wire burnt out or the battwry goes kaboom...

 

[pman5kmo]

Also a 1.5 ohm cart at 3v will equate to a 6v 6ohm system. 2a @ 3v=1a @ 6v=6w... hence a watt is a watt no matter watt

 

[Amandakgn]

Sweet! I had the same question! This chart helped! Saved it to my iPad!

 

[easygany]

I purchased some Vivi Nova and MINI Vivi Nova tanks and have 15 atomiser heads on hand. I noticed that none of the 1.8 ohm heads came out to be 1.8 ohms when checked thru my Provari. They were in the range of 2.0 ohms to 2.4 ohms. The 2.0 ohms may work well with the Ego battery but the 2.4 ohms may not give a satisfying vape due to low vapor production. Note that the resistance label on those atomiser heads are not that accurate.

I use the Mini Vivi Nova's on my Ego C Twist (variable voltage battery) with a satisfying vape.

 

[StraightV8per]

I'd also like to toss out a big thanks to this forum.. If I hadn't found it I think i would have gone with a big market ecig like blu or v4l just because of its ease of use and ordering, but I can tell already that digging farther into vaping, trying to understand the parts and the ins and outs of vaping is going to pay off in the long run..

You are right, stick close to this forum and don't be afraid to PM vets and others for questions, that is the BEST way to learn and keep from spending too much and driving yourself crazy. I beat my head against the wall so many times before finding the forum and could have saved a ton of money.

 

[lwaps]

The best will be the 1.8 ohms on your eGo. The vape will be warm. 2.4 ohms will work but will be a weak vape. The 3.2 ohm is meant for higher voltage devices. Here's a chart:

Nice info, thanks for posting !!

 

[junkman]

I can see how this can get a little spendy,..

Yeah, when I started I created a spreadsheet to track savings of not buying cigarettes vs. costs of vaping. Seems like the break even point keeps getting pushed out... I started off at about 30 days, now I think I am out until christmas!

 

[pman5kmo]

I purchased some Vivi Nova and MINI Vivi Nova tanks and have 15 atomiser heads on hand. I noticed that none of the 1.8 ohm heads came out to be 1.8 ohms when checked thru my Provari. They were in the range of 2.0 ohms to 2.4 ohms. The 2.0 ohms may work well with the Ego battery but the 2.4 ohms may not give a satisfying vape due to low vapor production. Note that the resistance label on those atomiser heads are not that accurate.

I use the Mini Vivi Nova's on my Ego C Twist (variable voltage battery) with a satisfying vape.

Forgive me if this is answered on page 4... lol just with my 'ADHD' i will click on the next page and get distracted by... oooh shiny

Designing such low ohm resistance items you will always have a margin of error. When you look at electronic resistors, they always have a +/- rating in a %age... the higher end (usually cost more) state of the art resistors have a lower variance than older ones. I can get a ton (as in 2k lbs) of 20ohm 5% moe resistors for about $40... but for the .05% rated, it is about $1000.... They all have their purposes, and I can tell you that the mfgrs are using the cheapest ones, as the MOE is not a big issue at such low ranges, as well as a single 2ohm .01% rated resistor costs about 30 cents in moderate bulk. This coupled with design limitations (the way in which the resistor needs be installed) makes the use of less expensive, but requiring higher heat resistance (if you take a cart completely apart, you will see they usually have some solder on them... if they are not soldered in completely...). The resistors used are TINY, and run about a cent a pop in massive bulk.

now for that much variance, sounds more like some were mislabled/mixed up with the higher resistance heads... which can/does/has happened... and anyone could have done it... but it sure as heck was not I... lol

 

[pman5kmo]

Yeah, when I started I created a spreadsheet to track savings of not buying cigarettes vs. costs of vaping. Seems like the break even point keeps getting pushed out... I started off at about 30 days, now I think I am out until christmas!

LMAO... I know I have already broken even... but that is also in huge part due to the fact I alrady had so many damn 18650 IMR batteries around from when I ordered an OEM box (50pcs) for about $3 each, shipped from when I got some flashlights/torches that use them and rebuilding laptop packs