Best Kanthal for Sub-ohm wrapping?

[aznzing03]

So I recently purchased an RSST and have been fiddling around with it the past few days. Mainly just rebuilding coils to see what works and what doesn't. What I like and what I don't.
I've found that I can pretty much only have a wrap of 3/2 with 30G Kanthal and have it stay consistent and not develop hot spots and what not. That wrap normally gauges out to about a .9 to 1.1 ohm. Which I am okay with.
I had attempted to just do a 2/1 wrap to go for lower ohms around .6ohm, and I keep getting hotspots and I just can't seem to work them out. Also I adjust everything on a battery around 3.7V and then I switch out to a fully charged battery and the coil just pops.

Any suggestions? Something you feel like I'm doing wrong?
If you need me to be more specific, please let me know.

Using an RSST SS #400 mesh with 30g Kanthal wire on a K100 with AW IMR 18490 one at 3.7 the other fully charged.

Thanks!

 

[State O' Flux]

The thicker the wire, the lower the resistance for a given length... or to put it another way - the coil diameter or number of winds. 28ga is what I'd suggest using for your RSST.

 

[pdib]

yes. 28g Kanthal is ideal for ~1Ω builds.

 

[LeoRex]

Got a RSST on a K100. I have a 3 wrap of 28g Kanthal and I'm .8, close to .9... thing is rock solid and can take all the zap I can throw at it.

Maybe you just don't have enough wire in there. With a 2/1, that's a LOT of heat to push over a short length of wire.

 

[pdib]

Oh, well as far as popping wires goes. That's a nother story. Usually hot spots are an issue of tension. (wire too tight on some sections of your wrap). Thicker wire may not pop, but it will vape like crud. So, need to fix the build. Pictures (in-focus, close-up) of dry wick and glowing wire are a great diagnostic tool. Can you post some?

 

[natedawgdaboss]

I myself havent ventured into genesis style attys but a guy at my local shop loves 26ga kanthal, says its all he uses...just thought I'd throw that out there

 

[pdib]

26g Nichrome is my favorite. BUT this has to do with desired resistance! I liked a .6Ω coil on a Genny. 30g is ideal for VV devices. 28g is nice for mechanicals. None of them will serve well if the build is bad. The fatter gauges will be more forgiving during set-up. They won't pop as readily, and will give you more time to adjust tension and such.

 

[aznzing03]

Thanks for all the feedback guys!
Currently just set up a triple twisted 32g kanthal with a 4/3 wrap and it's right on .8ohms. Beautiful.
Once this coil needs to be changed, I'll probably go with the ribbon or the 28g like you're saying.
That and now probably going to do an RDA and dual coil/quad coil. Got the itch.