Long time vaper but first time posting and new to RTAs. I've been slowly upgrading my gear and I think I've finally landed on what I like the best. My problem is that I'm burning up builds in 3 days or less and I was hoping to get some advice/suggestions on extending the life of the coil. I have a vaporshark DNA 250 with a Vandy Kylin RTA. My build is two 30g Ni200 coils wrapped 14 times. My juice is about a 60vg/40pg with 18mg nic. Cold ohms are 0.18~ and firing ohms are 0.33~. I have two settings, cold and hot.
Cold: 45W, 420 degrees, locked ohms at 0.25ohms temp dominant (to heat up the coil). Preheat is 55W at 5 soft for 2s. I can puff on it for maybe 5 puffs before I need to switch to the hot setting:
Hot: 35W, 350 degrees, unlocked ohms (Ohms are between .26 and .30 by this time). Preheat at 20W at 1 soft for 2s. This hits pretty great while the coil is hot but my coils are still turning black in a couple of days. I need a cold setting because when I set the preheat to 60W on the hot setting, temperature protect shuts it down and the coil never gets up to 0.3 ohms. So what am I doing wrong? Do I need more wraps, less? I tend to burn it on the hot side.
