I intend to learn a lot more before I put one on a mod and try to use it. I have watched a number of the videos. I did get a coil master device that tells me the resistance and allows me to dry fire it. One thing that I am having trouble finding information on is what wattage do vape at if I know the resistance?
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Can only give some very general guidelines, because people like their vapes at different temperatures.
On a regulated mod:
Coil at approximately 0.7 ohms to 1 ohm, start at about 20 watts.
Coil at approximately 0.45 to 0.69 ohms, start at about 28 watts
Coil below 0.45 ohms, start at about 32 watts
On any of these, after you try the coil at the suggested starting point, you can go up or down by at least 10 watts. As long as you don't start to get the taste of burnt cotton, you can push it up a bit farther than that if the vape is gurgly or weak, or the flavor isn't what you want.
The higher the ohms of the coil, though, the less you'd want to vary from the recommendation. I wouldn't vape a 1 ohm coil under most circumstances at more than about 32 watts. On the other end of the spectrum, I would vape a 0.22 ohm coil at anywhere up to about 65 watts. I don't vape much higher than that, but that's just personal preference. This can also be very device-dependent. I recently bought a Haar RTA (clone). The coil in it is 0.24 ohms and I'm vaping it at 28 watts. That's just where it seems to be the best vape, but that situation is very unusual.
You will need to be aware of how your airflow is set as well. If you want to vape for better flavor, push the watts only a little bit and close your airflow some. So for example, if you have a 0.50 ohm coil and you're vaping for flavor, you might put that at 35 watts and have the airflow about halfway open. If you want great big clouds, you'd be more likely to like the vape at 0.20 ohms, 80 watts or more, with airflow wide open.
Vapor gets hot when watts are high and airflow is restricted, but it will get cooler if airflow is opened up some. It will also get cooler if watts are lowered, but if you go too low on watts you may find your atomizer flooding, gurgling, etc. because the watts supplied to the coil don't get the coil hot enough to vaporize all the liquid going to it.
On the subject of dry-firing coils, if you are using stainless steel wire, do not dry fire them at high wattage. You want to pulse them at about 20 watts, and just until you see them starting to turn red. Don't dry fire them hot enough that they glow bright orange. This is important.
As I said, just very general guidelines.
Everybody fumbles around at first. It's a very rare person who actually CANNOT build. Like everything, practice makes perfect.
