It has to do more with the great amount of micro indents a exotic coil has.They hold more juice within.Fancy coils almost always have great mass.
So the claim goes.
Claptons, in my opinion (subjective), trades off mass for surface area while trying to maintain resistance. Prior to Clapton’s, to gain surface area, you added more wraps, which also adds more mass and increases resistance – both of which are not really desirable with fixed voltage devices of the time, should the objective be more vapor production. Claptons increase surface area, slightly lowers resistance in comparison to their core equivalents of a single wire, but the compromise is mass. However, that compromise in mass is dealt with the slightly added power output due to the lower resistance. That said, not all Clapton type coils are the same, and one can chose a low(ish) mass coil that retains a high surface area.
@Celso – you have a relatively small(ish) coil of only 4 wraps but yet it yields a somewhat high mass. To draw a comparison, a Fused Clapton I regularly use consists of 4x 30 awg cores with a 40 awg wrap. At 4 wraps around a 3mm ID it is ~25% less in mass but ~35% more in surface area than your coil. The difference in mass means for the same power it will heat quicker, and it’s increase in surface area will result in more vapor production. Coil mass is often overlooked and attention is drawn to coil resistance, which does not really play a roll in variable wattage devices. Higher mass means more power is needed to heat a coil and longer time is needed to cool it down. Problem is, no coil manufacture advertises their coil mass. Steam Engine (a virtual coil modeling tool) can assist with this.
Steam Engine | free vaping calculators
When looking at a Clapton type coils or wire, the numbers (wire gauge) can say a lot. As an example - for the core of the wire, 2x 27 awg wires are equal in mass as a single 24 awg wire of the same length and metal – but the 2x 27 awg is also yields more surface area than a single 24 awg. The gauge of the wrap also plays a large roll. The lower the gauge, the higher the surface area, but at the expense of mass. There is a point of diminishing returns and our challenge is finding those limits that fit within our personal needs.
As for your wicking issue, I also shadow what has been said but to add that cotton does expand when wet so this needs to be accounted for. You will have to experiment to find what works. Unfortunate reality. Shoe string type cotton such as Firebolt can take some of that guess work out of the equation. But keep in mind they are only made for 1 size coil (3mm ID), so if you use smaller or larger ID coils, you will have to use something else. Cotton pads such as Muji can be beneficial for they are consistent in density allowing you to measure how much you cut and repeat that measurement once you find what works.
Long post but hopefully it helps. Good luck
