Dice - could you link to the post where you talk about the v-build? - Thanks
I've talked about it in many threads, think I did a partial in the Vcore thread, but once I do a current build process will link it here on this thread also.
The reason it isn't really suitable is the piddly airflow, @ 0.235 ohms you need a minimum of 2.5mm worth of airhole to keep the coil cool enough not to burn up the wick.
A R91 has a 2mm external airhole diameter I believe, the only way it wouldn't burn is if you're sucking the hell out of it for short bursts and not chain vaping.
0.235 ohm @ 4.2 volts (mech/battery) = 75 watts
There is simply no way to vape a stock Kayfun/R91 at that power level.
I vape a Atomic at this level occasionally and the 3mm airhole is only 1.5mm from the coil and it will occasionally burn the wick even while still semi-saturated and pulling hard on it.
I don't know what device you're vaping but it must not be putting out the power it's being set on. Or have you modified the airhole diameter on the Russian?
Um, on the original post in this thread that I made about this build, I posted my build and the device it was being fired by, the SuperMax. I'm running an original Russian, which was my first rba, with an 0.40 ohm coil. vertically mounted, in an inverted V-twin micro coil, 12 wraps of 22 gage Kanthal wrapped around an ~16 gage mandral, using high tension wrapping technique. Bend the sucker in two and wrap your wick between the serial dual's and completely around. Creating dual Verts /\ serial style. I then put it on the Max at 5.5 volts, works out to a tad over 75 watts..
The SuperMax is a 15 amp regulated box mod, that is VV & VW. In VW mod it can vape at a max of 50 watts, with a 5.5 volt max threshold. In VV mode it can run at a max of 5.5 volts with a max 15 amp continuous draw. An Ideal build of 0.3667 ohms at 5.5 volts yields a tad over 82 watts and 15 amp draw, and would be the max that Max can put out.
So yeah, with rayon and ramie wick I can and do vape the Russian and the Rose2 at 72-75 watts, and it is one damn fine vape. I have removed the air adjust screw on the russian, which does open up the air flow a tad, and all my air control rings on other rba's, have been removed as well.
but yeah, surprised the frak out me but it is one damn fine 75 five watt vape. I chit you not. Have no reason to inflate my readings or statements. 75 watts ain't really anything extraordinary, heck vape the Magma in the 90's. but here are two pics of the Russian on Max, one pic you will notice the ohms of the build it say 40 . Max, when first reading a build will read .4 first, then after a half second, will roll to the hundredths column, in this case 40 . The second pick is the voltage output setting of max, reading 5.5 If it was in watt mod there would be no decimal point.
Have the exact same build in the Rose2 pictured on the TARDIS mod next to the SuperMax and Russian.
So yeah, when wick, air and power are all capable, I chit you not, as my word as an eagle scout, well, in the 60's, and on my mothers cremated remains, that darn tootn' the Russian does 75, and that's no jive.!!! Watts that is, vaporized Max-imized.
Just because there is no way you are capable of getting an Russian/Kayfun style rba to wick and breath properly at 75 watts does not mean it can't be done. I have done no modifications on the Russian, besides completely removing the air control screw.
Vape long and prosper...
