Coil Resistance & Coil Lifespan

[fstanek]

I have a Halo VV battery. I started out with their 2.4Ω coils. Those would last about a week at most. The fluid would get dark at the bottom and the taste would change. I switched to 1.8Ω coils when I noticed that I was always close to to max on the VV battery. This change in coils now keeps me towards the bottom half of the VV settings.

I have noticed that the 1.8Ω coil lasts a LOT longer than the 2.4Ω coil. I've had the same coil now for 3 weeks, and there isn't any discoloration in the juice. Also, the taste hasn't changed at all.

Is this expected? I was kind of expecting the opposite since the lower resistance would mean that more power would go into the coil.

 

[Ryedan]

You're into Ohm's law here to calculate the power for each resistance and voltage combination. Here's an online Ohm's law calculator. Plug in 2.4 ohms and 4.6 volts (close to the maximum your battery outputs) and you get 8.8 watts. Now plug in 1.8 ohms and 3.6V and you get 7.2 watts so 18% lower.

I take it you're using the Triton tanks? I'm not familiar with them and the heads but the change in performance between them at your power levels is in the right direction. Hopefully someone who is familiar with these tanks will help more.

 

[Baditude]

In "general" terms:

Lower Ohm Coils Will:

• Heat The Coil Faster
• Produce More Vapor
• Drain The Battery Faster
• Use E-Juice Faster
• Produce A "Warmer" Tasting Vape

Higher Ohm Coils Will:

• Heat The Coil Slower
• Produce Less Vapor
• Provide A “Cooler” Tasting Vape
• Use Less E-Juice
• Prolong Battery Life

You appear to be making your observations based upon one coil's performance, if I'm not mistaken. I haven't used pre-built coils in over a year, but when I did I found higher ohm coils lasted longer than lower ohm coils. Results can vary from one manufacturer to another, and one batch to another. Quality control of pre-built coils can vary greatly, and was one of the main reasons I switched to making my own coils.

 

[Thrasher]

Chances are to get the lower rescoil they dropped the wire gauge, which also means lower resistance for the same size coil.

(R) is x per inch it doesnt care if you make a 1.5 or a 3 ohm out of it.

Chances are on the higher res the coil wasnt getting to full temp if the mod was maxed thinner wire not getting quit hot enough and the juice baked on even faster

 

[WattWick]

In my experience - besides naturally gunky liquids - slow heating and cooling of the coil is the main culprit in gunk production. Think of reducing a broth; letting it slowly simmer to get the water (read: pg/VG in our case) out and leave all the good stuff (read: our flavorings) behind.

I believe your experience comes not from different resistances, but from different mass. More mass heats slower and cools slower. Some brute force their way past the slow heating with higher wattage. Which leaves even more heat that needs to go somewhere before your atty stops reducing broth after you let go of the button.

 

[Outcast]

I build .1-.2 coils I have never had a gunk problem


Sent from my iPhone using Tapatalk

 

[Outcast]

I build .1-.2 coils I have never had a gunk problem
I also use 100% VG flavorless so I don't know if that makes a difference

Sent from my iPhone using Tapatalk

Sent from my iPhone using Tapatalk

 

[Outcast]

Also look here lot more durable this is my 26ga quad twisted

Sent from my iPhone using Tapatalk

 

[Two_Bears]

I have a Halo VV battery. I started out with their 2.4Ω coils. Those would last about a week at most. The fluid would get dark at the bottom and the taste would change. I switched to 1.8Ω coils when I noticed that I was always close to to max on the VV battery. This change in coils now keeps me towards the bottom half of the VV settings.

I have noticed that the 1.8Ω coil lasts a LOT longer than the 2.4Ω coil. I've had the same coil now for 3 weeks, and there isn't any discoloration in the juice. Also, the taste hasn't changed at all.

Is this expected? I was kind of expecting the opposite since the lower resistance would mean that more power would go into the coil.

When I rocked the Kanger Subtank Nano and rebuilding the OCC heads; I had a .9 ohm coil last for three months. About every 10 days to two weeks it would taste funny. I removed the cotton wick and re wicked the coil. Of course I was careful to not damage the coil. Have no idea why I thought I needed 500 feet of 26 gauge Kanthal. ;-)

 

[tj99959]

I build .1-.2 coils I have never had a gunk problem


Sent from my iPhone using Tapatalk

Well golly-gee!
I can still see my keyboard while I'm typing using a 2.0 ohm coil instead of a 0.2 ohm coil, but what does that have to do with the OP's question.

Most of us can't speak to your specific problem with your PV/tank because we have never used that combination. But, rest assured that every PV/tank combination has it's own set of tricks that will make coils last longer.

But in general:
Discoloration of the liquid is normal, it's simply oxidation of the flavorings caused by heat. So the amount you see in the tank is an indication of how well your tank can dissipate the heat. (there is also some leaching from the coil/wick back into the tank)

The length of time a coil will last is a little more complicated. I made a 1.25 ohm coil/wick in a KayFun last for a full year of daily use, but that was a combination of the right juice, proper maintenance, right gauge wire, right wicking material (hollow ekowoll), right power setting, and on & on. (but that was an exception)

I would say that a good average is that a properly built coil should last 3 months.

I don't use any of the "blister pack" coil heads of any brand, so I can't comment on how long they can be made to last, or how to do it.

 

[fstanek]

Well, about two weeks ago I changed out my 1.8Ω coil for the first time. The old 1.8Ω coil was just fine, but I wanted to see if the old 1.8Ω coil was just a fluke, or if they really do last longer than the other, higher ohm coils. Two weeks in, and the new 1.8Ω coil is as good as new.

I don't know why, but the Halo 1.8Ω coils just last a lot longer than their higher ohm offerings. I'll stick to the low ohm coils from now on.

BTW, I don't do any cleaning/maintenance on the coil itself. With my old 2.4Ω coils, I'd just exchange them when the liquid went dark or the taste changed. I've yet to experience any of that w/ the 1.8Ω coils. I'm sure it will happen, but I'm pretty confident now that I can use them for many weeks before it does.

 

[ian-field]

I have a Halo VV battery. I started out with their 2.4Ω coils. Those would last about a week at most. The fluid would get dark at the bottom and the taste would change. I switched to 1.8Ω coils when I noticed that I was always close to to max on the VV battery. This change in coils now keeps me towards the bottom half of the VV settings.

I have noticed that the 1.8Ω coil lasts a LOT longer than the 2.4Ω coil. I've had the same coil now for 3 weeks, and there isn't any discoloration in the juice. Also, the taste hasn't changed at all.

Is this expected? I was kind of expecting the opposite since the lower resistance would mean that more power would go into the coil.

IME: Higher resistance coils gum up quicker. I'm using old kit Vivi-Nova V2 and got some reduced to clear cartomisers, as standard they're fitted with 2.4R coils and barely last a day. When I can get them, 1.6R coils last nearly a week.

With my DIY coils I aim for about 1R and usually get a week or slightly more. When I first started with Vaporlites cig-alikes, I got the occasional open circuit coil, but in attempts to clean old coils by dry burning, I've run them up to 12V without breaking any - dry burning doesn't improve the wick any, but I got an impression of how robust the actual coil of wire is.

One attempt at cleaning was a solution of caustic soda in an ultrasonic cleaner - that was abandoned because the ultrasonics just disintegrates the wick. The atomiser has a sort of chimney with the coil at the bottom, I just shake some caustic into there and leave it a couple of days. After that, a couple of days soaking in water, then I flush it through by holding it in the spout of the cold water tap. It takes a couple more days to stand and dry naturally - during which time, any tiny remaining vestiges of caustic soda are absorbing carbon dioxide from the air and becoming sodium carbonate. If there even is any left - it doesn't affect the flavour.

 

[edyle]

I have a Halo VV battery. I started out with their 2.4Ω coils. Those would last about a week at most. The fluid would get dark at the bottom and the taste would change. I switched to 1.8Ω coils when I noticed that I was always close to to max on the VV battery. This change in coils now keeps me towards the bottom half of the VV settings.

I have noticed that the 1.8Ω coil lasts a LOT longer than the 2.4Ω coil. I've had the same coil now for 3 weeks, and there isn't any discoloration in the juice. Also, the taste hasn't changed at all.

Is this expected? I was kind of expecting the opposite since the lower resistance would mean that more power would go into the coil.

Your higher resistance coil happens to be the higher power coil.

Resistance alone does not tell you what power the coil will run at.
Both of those coils are probably from the same type and size of wire.

 

[Two_Bears]

Well, about two weeks ago I changed out my 1.8Ω coil for the first time. The old 1.8Ω coil was just fine, but I wanted to see if the old 1.8Ω coil was just a fluke, or if they really do last longer than the other, higher ohm coils. Two weeks in, and the new 1.8Ω coil is as good as new.

I don't know why, but the Halo 1.8Ω coils just last a lot longer than their higher ohm offerings. I'll stick to the low ohm coils from now on.

BTW, I don't do any cleaning/maintenance on the coil itself. With my old 2.4Ω coils, I'd just exchange them when the liquid went dark or the taste changed. I've yet to experience any of that w/ the 1.8Ω coils. I'm sure it will happen, but I'm pretty confident now that I can use them for many weeks before it does.

Yesterday I removed my coil after using it for two and 1/2 months. I could have used it longer but wanted to try a brand new type of wicking material and also start with a brand new coil.

I changed the cotton about every 6-9 ml of juice and dry burned the coil and rewicked the coil.

I use two RTAs. Goblin Mini and a Kayfun Nano.

 

[LimJaheyyy]

Sometimes the .5 kangers last 2 weeks, sometimes 2 days. Drives me nuts

 

[sofarsogood]

I think gunking is all about what's in the liquid. I have one liquid that gunks up in 2 days and another that's not a problem indefinitely.