I try to do my research before throwing money at such an obscure topic as mechanical
mods and SLR
devices. I started a thread in the APV section before I made my first purchase. I started it because I wanted to establish how many mechanical users ended up installing a "kick", which to me seemed to defeat most of the advantages of a purely mechanical
mod. I had that question answered and at the same time learned quite a bit about SLR, why people might prefer it, and mech mods in general. You can see the thread here:
http://www.e-cigarette-forum.com/fo...who-honestly-prefers-vape-un-kicked-mech.html
Some conclusions I've made since I've been vaping low ohm and sub-ohm attachments on my first mechanical (a Sigelei #8):
Lower gauge wire, such as 28 gauge, allows for more wire for a given resistance target than higher gauge wire. This in turn permits the use of much thicker wicks (I use 3x3mm in my Smok RDA) and even dual coils with thick wicks. More wicks means more wicking which means more liquid exposed to the heating coil(s) and in turn means potentially much more vapor production. Of course increased airflow is also a factor in reaching optimum vapor conditions and this ultimately leads to a reduction in nicotine levels too. I too find I can only tolerate half the nicotine at SLR levels of vaping! I use 18mg in vivis and the like on my Vamo and only 9mg in my SLR devices.
Lower gauge wire, being thicker, also provides a larger contact area with the wick itself and again I believe this contributes to better vapor production than a much thinner wire (higher gauge) at the same resistance target. I won't pretend to fully understand the thermodynamic characteristics of the two wires but it seems obvious to me that they are quite different and I have discovered that I personally prefer the results provided by the thicker wire.
Lower nic levels mean less throat hit and (presumably) diluted liquid leading to diluted flavor are BOTH quite nicely offset by the significant increase in vapor production in a properly dialed in SLR device... with the added benefit of being able to exhale huge clouds of vapor, upon demand.
Dialing in the coils to find the "sweet spot" on a mech, 1.1 ohms on a 500 mesh/28 gauge kanthal setup on one of my AGA-T2s, means that any VERY strong hits from a freshly charged battery quickly roll off as the 4.2 edge of that charge is softened. It's then a perceptibly even vape, more or less, until the battery reaches about 3.6-3.8 volts (several hours) at which time I exchange it for another one and the old battery gets a turn on the charger. My 0.9 ohm Smok RDA is similar. In both examples I tried slight variations on wick-coil combinations for slightly lower or slightly higher resistance before I settled on these "sweet spots" for "flattest" vaping pleasure throughout the battery charge.
My (very slightly improved) mod never gets warm, beyond the body heat of my hand or heat transfer from the atty, even when I'm chain vaping.