Popping is usually down to water droplets from condensation on the coil. If I'd been chain vapeing the Zeph before I went to bed, with the heat in the tank then cooling over night condensation would form. The first couple of vapes the next morning was a 'lively' affair, with pops & cracks. On ine occasion, I'd fired the mod when it was about an inch away from my mouth, there was a hell of a crack (the near on scrared the shit outta me !) I actually felt the pressure wave hit my lips. I'm pretty sure it would have rattled my teeth if it had been in my mouth when it went off ! lol
Some juices can be a bit poppy if the wicking is slightly loose
The monster quad was 12 wraps with a 2.5mm ID. I only had an 80w mod, that build needs around 140w.. It had a 3-4 second ramp up at 80w, and made it a HOT vape.
This was another plain stupid build.
I couldn't get enough heat into that to take the spring out of the coils, even after a 30 second fire @ 160w and 47.5A ! I'd a 160w mod that would fire down to 0.03, 2x 18650 cells don't have the guts to fire a build that low. I stripped 2 coils from one side, that brought it up to .1ohm and it was a lovely vape @ 130w.