The resistance of the coil, combined with the wattage, determines the temperature at which the liquid is evaporated. High resistance coils are less suitable for high wattages than low resistance coils. At high temperatures, the liquid evaporates faster, so you inhale more liquid per puff. Because PG (propylene glycol) can become very sharp and can cause throat irritation at high intake, Sub-Ohm systems are most appreciated when using liquids with a relatively high VG content.
30PG/70VG is a common ratio for e-liquids intended for Sub-Ohm vapes. Faster evaporation also means relatively more nicotine per puff. So at higher wattages you can lower nicotine levels to get the same intake. Nicotine can also feel pungent in the throat or aggressive to the lungs when taken in excess. An overdose of nicotine can cause nausea and headaches.
The dosage of nicotine is personal and easy to estimate: Simply use the amount you need to stay off the tobacco.
There is some guidelines to do this wisely;
If you have to inhale a lot of 3 mg e-liquid to get satisfied, you probably better take a step up to 6 mg. Inhaling less liquid is not only cheaper, but also better for your health. If your throat or lungs don't agree with 6 mg but you don't get satisfied with 3 mg, you could try liquids with nicotine salt (nic salt). For Sub-Ohm systems we have a number of high VG liquids with nic salt. (See our Aisu line). Because a too high dose of nic salts evokes much less natural physical resistance than a too high dose of standard nicotine, we recommend not to use more than 6 mg nic salt in Sub Ohm systems. Too high a concentration of nic salts can lead to dizziness, nausea, headaches and a greatly increased nicotine dependence.
If this doesn't work for you altogether, and you still have the urge to smoke tobacco, we advise to try a low output pod device like the Caliburn with a high concentration of nic salts. Nicotine is the main driver for smoking. Of course call or mail us if you would like advice.