Effects of wire size on vapour

[justcallmecam]

firstly a big thanks to everyone on the forum for knowlege i have gathered lurking over the past few months.

This is my first post been cigarette free for 5 months now and building coils for mechs and vw devices.

Please note i am not asking about wire size effects on resistance or ramp up time here,
Rather effects on the vape with same resistance coils in different wire sizes.

For example in my zephyrus tank i have just built a dual 28g coils, 5 spaced wraps coming in at .45ohms.
The previous build i had in there was with 26g more wraps and not spaced although i cant remember how many also coming in at .45 or slightly lower.
I was running both these builds at 30watts and i honestly can not tell the difference between the two performance wise, the 28g may be a little warmer and seems like slightly more vapour but that may be due to the coils being spaced. I can run the 28g up to 40w before it starts to get dry, i was getting dry hits off the 26 at just over 30w.

Maybe i dont notice a difference because wicking is becoming the limiting factor with the builds on this tank?

So my question is why build coils with larger size wire? What advantage or disadvantage does say a 24g .4ohm build have compared to a 28g .4 ohm build
Surface area? Or just the overall coil size to fit what your building in. They are the only 2 variables i can think of.... am i missing something?

Cheers.



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[robot zombie]

Surface area, mostly. If given adequate power, a larger coil will vaporize more juice at any given point, which makes for denser vapor. It also makes them prone to guzzling juice, which is why you're probably getting dry hits more easily. Your wicking probably isn't keeping up with the demands of the larger coil.

Resistance and ramp-up are important factors. You can't talk about the properties of different gauges without factoring those properties in. You wouldn't run different gauges at the same power levels and resistances, as their optimal ranges differ as much as their performance in their optimal ranges does.

Generally speaking, if you build a 24g coil at the same resistance/power level as a 28g coil, the 24g will be cooler and probably not perform as well because it's the same amount of power heating a much larger amount of metal. It needs 4 times as much power to reach the same temperature. That's why they perform best at moderate to high power levels. Most people use them in atties with a lot of airflow at higher power levels for a denser, warmer, more flavorful vape. That's where they really surpass lower gauges.

Imagine you took a 28g build, quadrupled the size of it, and gave it four times as much power. That would be the difference between a 28g build and its 24g equivalent. What you're left with is essentially a heating element that can heat four times as much juice to the same temperature as the 28g build. Make sense?

24g kanthal is my go-to RDA wire. I like duals between .18 -.24 for my mech and .2-.3 for my Sigelei. The difference between that and a dual 28 or 26 at a higher resistance is night and day on those setups.

Maybe not so much in a tank system, though.