An email comment from a friend recently sparked a lot of thoughts about coil making.
Once you can make a suitable replacement coil you now have some nice options to consider.
Lets look at the different puff styles of PV users.
Some draw cheek only then inhale. Others take a long draw directly into the lungs.
This can severly effect atomizer, battery life and tailoring your replacement coil can be a huge advantage to your vaping style and enjoyment of your PV.
Lets look and consider a few examples:
A cigar smoker normally uses the "cheek draw". They may inhale or not. My findings and testing show that most e-cigs @ 3.7v don't support this method well. Even when watching videos you will see people taking "primer puffs" to warm it up and get vapor production going well. This can be resolved by making the coil a bit lower in ohms(hotter) allowing it to heat up faster. It will produce vapor faster and less time in the "on" state" overall reducing the actual battery usage.
Next is the "long draw" while inhaling style. Most PV's are more suited to this, but due to the length of the draw can actually still work quite well from a slightly higher ohm coil than the factory 3.4ohm. 4-4.5 ohms works well for users in this catagory at 3.7v. The higher ohms draws less current supporting longer battery life. The long draw allows the coil time to heat up to vaporizing temperature.
Lastly is the pipe smoker. Pipe smokers seem to like a few puffs and either inhale or not. Somewhat in between the 2 examples above.
I personally believe this is a reason many people choose to go to HV. Unfortunatlely, this is much harder on the very fine factory 38ga wire and drys out quickly too, further increasing heat, causing premature atomizer failure. Enter the sale of of 4.5ohm HV atomizers. This certainly reduces the heat some, still higher than stock, but does help ease the load on the atomizer coil and drying out issues.
You're probably wondering "ok, where is this all going and what does it mean?"
When rewinding a replacement coil the larger the wire you can use is always better for durability. Period
You can increase the dia of the coil to hold more liquid while lowering the ohms a bit. If you get the dia to large it will go back towards a longer heat up time.
Here you have 2 choices, reduce the dia a bit or reduce the ohms a little.
Reducing the dia, but still larger than the factory size, will give a better reserve for more frequent and longer puffing but will require a little more heat due to the amount of liquid present in the now larger wick core.
Hopefully my explanation allows you to understand the idea I'm trying to get across on the variables at hand to enhace your PV enjoyment while preserving atomizer life.