Confusing results regarding coils/ohms

[Silver5656]

Is there a general guide as to how the number of coils and resistance affects flavor, throat hit, and "heat".

So far i've tried a various range from .5 ohms to 2.5 ohms and have not been able to establish a general rule.

I've had a 2.2 ohm give off a lot of "heat" with little vapor and little flavor

I've had a .85 ohm give off a lot of heat (slightly less than the 2.2) with a ton of vapor and flavor

I've had a 1.3 give off no heat, decent flavor, and decent vapor

I've had a 1.5 give off a lot of heat, little vapor and little flavor

I've had a 1.0 give off no heat, poor flavor, and little vapor.

This was all done on kayfuns, using 28 or 30 gauge, using micro coils (or close to).

My goal is to get no heat, and great flavor and I care little for vapor production. Also i'd prefer if the coil got hot faster thus having to avoid taking a "pre-vape" but this is also not a huge priority. And some seem to give more dry hits than others. Any tips or general rules? I understand my wicking could be a factor as well. I'm pretty good at building coils as i've done at least 20 re-builds or so (yea I know i'm new, but I wanted to find the perfect-for-me setup) and my wicking is getting pretty decent (i emphasize decent).

 

[CreepyLady]

The possibility here in addition to wicking could be a small hot spot as well on the higher ohm coils that had poor flavor and a lot of heat. Lower resistance = more heat. I would guess a good starting point for flavor and not so much heat would be right around 1.3-1.5 matching your 1.3 observations.

Try wrapping a 1.3, dry fire it to ensure you oxidize it and arent getting hotspots, then fiddle with your wicking until it hits the mark.

Good luck!

 

[Ryuukon]

Sadly there really isn't any general rule for coil building. You're on the right path though since you're testing with 2 different gauges of wire.

What device are you firing these coils on? Without knowing that and what voltage/wattage you're firing at, it's hard to tell you anything else. But generally, a thinner wire is going to heat up faster at the same resistance to a thicker wire. Thicker wire once heated up is generally going to make your vape hotter, assuming it has enough amps going to it to actually reach the voltage/wattage you're shooting for. Greater surface area generally tends to give better vapor/flavor since it will vaporize more juice over time.

By that same line of reasoning you might also experiment with ribbon wire since it has more surface area, thus giving you more flavor since that is what you're after.

And since you're getting dry hits, what are you using for your wicks?

 

[Silver5656]

My mods are both mech mods, all were running vt5's at the time of testing, all were either freshly charged or had less than 20 hits on them. I am currently using organic cotton I got at riteaid/cvs. I did just place on order on amazon for some japanese cotton (although I could not find the ko gen do or whatever I saw on pbusardo's youtube) to try it out. (I figured using a mech with fresh batts would eliminate the vv/vw variable which would come into play).

so does that mean that more flavor = more heat? I havent noticed that but maybe i'm doing it wrong? lol

 

[Silver5656]

Is dry firing what I do when I try and "tighten" my coils? If so i've been doing that every time. I guess I should focus on wicking. Should I try more? less?

 

[DetraMental]

I read that the right amount of wicking is when it drags through without much resistance, just a little, or not enough move the coil out of place. Kinda like pulling a shoestring through a lace. This is the method I use and it works great.

 

[Silver5656]

Thanks Detra! That's what i've been doing (or trying) but there seems to be a significant range between "not much resistance" and "not enough to move the coils" lol but I will keep at it! I have realized that a shorter cotton seems to result in more consistent hits

 

[Susan~S]

Which RDA/RTA are you using? YouTube has many videos on wicking rebuildables.

 

[Silver5656]

kayfuns. I've checked several of the youtube vids on wicking. Just need more practice. Was just hoping there was a "general" rule regarding ohms, # of coils aka surface area, flavor/heat and what not

 

[wheelie]

Another idea is long drip tips. I use three inch long drip tips which cool down the vape. Plus they keep my Rocket's and Kayfun's from popping juice in my mouth.

 

[Susan~S]

kayfuns. I've checked several of the youtube vids on wicking. Just need more practice. Was just hoping there was a "general" rule regarding ohms, # of coils aka surface area, flavor/heat and what not

The only "general rule" I have heard of regarding Kayfuns has to due with ohms. Can't remember the "best range" but the lower end was either 1.2 or 1.4. Someone who uses a Kayfun will know.

You might also like this pictorial blog post by ECF member crxess on wicking: Building Kayfun Lite Nano - Cotton Nest.

 

[dice57]

It's all a balancing act of wick potential, air supply, building skills, and optimizing builds for gear. Some rba's only have the potential to do so much without some modification. The more one is in tune with their gear, greater the satisfaction is found.

 

[coalyard]

Kayfuns can be pretty picky about airflow and how high you place the coil above the air hole. If you hit has a very wet taste and is very harsh with little vapor production, it is likely that the coil is too close to the top of the air hole in the deck. A good place to start is the bottom of the coil should be even with the + and - screws. Good luck.

 

[dice57]

The only "general rule" I have heard of regarding Kayfuns has to due with ohms. Can't remember the "best range" but the lower end was either 1.2 or 1.4. Someone who uses a Kayfun will know.

You might also like this pictorial blog post by ECF member crxess on wicking: Building Kayfun Lite Nano - Cotton Nest.

Well, don't listen to general rules unless you want a general build. Have the Russian built with a 0.40 ohm iV-twin coil, and vapes fine straight mech, and simply outstandingly Stellar at 75 watts. Everything depends upon everything. With the right build, wick and skill set, one can get great surprises. Only modification I did was removing the ac screw to help the air supply.

Generally, most any build will vape outstandingly on the Russian/Kayfun. The ultimate quality of the build and vape is highly dependent upon the skills of the vaper. Practice makes for greater satisfaction.

 

[tj99959]

The nice thing about the KayFun is that there is no need to get all that fancy with the build. A properly placed & wicked 1.25-1.5 ohm coil will give you a good vape. (and I'll call BS on vaping a KayFun at 75 watts, 7.5 watts would be closer)

I do feel that the Kayfun benefits from regulated voltage/wattage. My KF with a 1.25 ohm coil sits on top of a Kick-2 set between 9-10 watts, and that's only 3.4-3.5v.

 

[Silver5656]

Well I just built a 1.5 ohm 4.2v mech on my kayfun. Used 30g kanthal, 8.5ish wraps.

Throat hit is decent, heat is low, flavor is good, vapor is good. My 2nd best setup so far.

I used slightly less cotton and a tighter coil so overall less cotton through the coil. I also added a cotton "donut/gasket" into the chimney using very thin semi rolled cotton as seen in some of the youtube vids. I like it! To be honest, I was getting kinda tired of not being able to get a good setup. One of my mechs has a great setup. Tons of flavor, very wet (but not actually wet), medium heat (wish it was low), good vapor, and good throat hit. I wish I could duplicate this, and trust me I tried, but I cant seem to do it. The quest continues