I am struggling to verbalize my question, I guess. I am using the steam engine calculator, yes. And, I do understand that the number of wraps (as well as the gauge of wire) will determine the length of the coil over the airhole. I'm asking if everyone recommends a coil length that completely covers that air hole, is short of covering it, or is even slightly longer than the air hole?
As for diameter, I guess one picks that based on size wick they want? Do you find the larger diameter wick is working better than small?
Only coils I have built thus far were 1.5mm diameter, with 30 ga Kanthal. So they were micro coils, with coils touching...and very small wicks in a Kanger protank. Doubt that setup will transfer well over to the Lemo, as Roxynoodle suggested.
I'll probably follow Roxynoodles suggestion once the 28 ga wire arrives. In the meantime, I am wondering if I should still go larger diameter on the coil with the 30ga Kanthal I have. So, if I go with approx 2.25 mm diam wraps, I'll only have about 7 wraps for 1.8ohm.
I'm just guessing that 7 wraps of 30 ga is not going to cover very much of the airhole on the Lemo..... does that make sense? I'll be drawing lots of air over a relatively small coil, for a cool vape? I assume if I went say 10 or 11 wraps, I will cover more of that air hole, therefore a warmer vape.....but I'll have like a 2.7ohm coil...which seems like a ridiculously high resistance coil.
I dunno if I make any sense to anyone but myself. Ha ha.
My preference has been to build long, larger diameter coils to run at higher wattage. I'm on a 24ga wire kick at the moment, and the last coil I built for one of them was 3mm, 12 wraps of 24ga wire for about 1.1Ω. It's about as long as the positive block is wide. Vapes great at 25-30+ Watts. Any less and it takes to long to heat up for my liking.
26ga would solve that issue. 26ga builds seemed to do fine 15-25 Watts.
This could all be in my head, but it seems when coil length is longer then the diameter of the center air hole, the flavor is improved.



