Rayon wick, better flow, flavor, saturation and Nic Hit!
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Hmm. Yeah. 'Twas this fella (still on the same coil for a month now..)
CView attachment 370174
I'm gonna go back and revisit JeremyR's videos.
Feels like on an atty where the wick drops straight down from the edge of the coil, it's more prone on a collapsed shoulder. I'll work on it again tmr. Sleepy bird I am.
It appears to be twisted 28 at 5/64" or maybe 3/32" and without seeing the post on specs (didn't look and cheat) I would put it at around a .8 to 1.2 ohms. I would gather that you are getting burnt and dry hits from a kfl.
A suggestion, I've learned from trials, that a wick-less burn (with a drop or 2 of juice or pure vg will give you an idea of how the coil will behave and what kind of wicking it will need to match its performance. Obviously best tested in a rda but it will work in a kfl with the lower chimney on.
Might be an idea for when you rewick. Like always, after you wick test fire a few times to see how it performs in practice.
Consider fluffing your wick slightly before you let it drop down for its haircut...
Actually, not sure yet. Just spent a week with family for my baby sister's (surprise) funeral. PO has my mail on hold at their location so I will pick it up and restart delivery Tuesday...
Here's what works extremely well for me in all my Kayfun's, I've messed around with Kanthal between 26-30 gauge and the 26 seems to work the best, for me anyway, it's 2.5mm with 7 wraps of the 26ga and measures .8-.9 ohms, it produces a nice warm vape, great vapor production and excellent flavor. Be sure to place your coil about 2mm above the air inlet, I find closer works better, but not to close to restrict air-flow.
The Rayon is a game changer in the KF's for me...your results may vary, but for me it outlasts cotton by a mile, my old cotton builds required re-wicking every 2 tankfuls, the rayon lasts at least four, maybe more, I just haven pushed it that far, great vapor production and a nice warm flavorful vape using the coil described above.
The Rayon is a game changer in the KF's for me...your results may vary, but for me it outlasts cotton by a mile, my old cotton builds required re-wicking every 2 tankfuls, the rayon lasts at least four, maybe more, I just haven pushed it that far, great vapor production and a nice warm flavorful vape using the coil described above.
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I'm having a problem that I can't get my head around. As mentioned, I'm using my Kayfun again lately, and I have had this happen 4 times now: it works perfectly with great flavor at 18 watts until... I do a refill. A couple of drags after the refill I get a horrible scratchy hit. The rayon isn't burnt or singed, it still looks wet-ish, but it tastes horrible.
If it was related to my build, it should show up sooner, right? But no, a full tank with fantastic flavor, and then "aaaarrrghh".
I'm filling from the bottom screw with a needle tip, and leave enough space for an air bubble. I'm not even chain vaping or anything. The rayon did not collapse or anything like that.
The problem must be related to pressure/vacuum. Anybody any idea what could go wrong and how to avoid it?
PS: remind me to never again post pictures and a "how to" when I can't even get my own .... together.
If it was related to my build, it should show up sooner, right? But no, a full tank with fantastic flavor, and then "aaaarrrghh".
I'm filling from the bottom screw with a needle tip, and leave enough space for an air bubble. I'm not even chain vaping or anything. The rayon did not collapse or anything like that.
The problem must be related to pressure/vacuum. Anybody any idea what could go wrong and how to avoid it?
PS: remind me to never again post pictures and a "how to" when I can't even get my own .... together.
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Its cool we all end up having random problems at some point. What you got sounds like a coil dry hit... If your sure it didn't collapse on you then you may be correct that its a vacuum problem... If it is - setting it upside down for a few minutes or 5 may help. A dry pull or blow can break the pressure too. Or cover air hole and pull to put negative pressure in the chamber.
Also the root cause could be the channels getting blocked with too much rayon, this is usually the cause of the issue I would think.
Also the root cause could be the channels getting blocked with too much rayon, this is usually the cause of the issue I would think.
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So, Thanks to JeremyR who pointed me to a Sally B. S. within 20 miles of where I live I went and picked up a 500 ft box of rayon today. 
Now I have a question for my more experienced friends here.
I have been following this thread for a while now and have decided that it is best to trim the tails on your coil builds.
My most used devices are a Spheroid, a Russian 91%, a KFL +V2 and I use my PT2s for on the go. Do you think trimming is required on all these devices?
I would imagine yes to the Russian and KFL but what do you recommend on the Spheroid and PT2s?
Looking forward to the switch from cotton to rayon - Thanks Jeremy
Now I have a question for my more experienced friends here.
I have been following this thread for a while now and have decided that it is best to trim the tails on your coil builds.
My most used devices are a Spheroid, a Russian 91%, a KFL +V2 and I use my PT2s for on the go. Do you think trimming is required on all these devices?
I would imagine yes to the Russian and KFL but what do you recommend on the Spheroid and PT2s?
Looking forward to the switch from cotton to rayon - Thanks Jeremy
^lol yes trimming IS required for the kayfun types.
Source: the guy who stubbornly refused to trip his tails and eventually gave up resisting.
Source: the guy who stubbornly refused to trip his tails and eventually gave up resisting.
So, Thanks to JeremyR who pointed me to a Sally B. S. within 20 miles of where I live I went and picked up a 500 ft box of rayon today.
Now I have a question for my more experienced friends here.
I have been following this thread for a while now and have decided that it is best to trim the tails on your coil builds.
My most used devices are a Spheroid, a Russian 91%, a KFL +V2 and I use my PT2s for on the go. Do you think trimming is required on all these devices?
I would imagine yes to the Russian and KFL but what do you recommend on the Spheroid and PT2s?
Looking forward to the switch from cotton to rayon - Thanks Jeremy
I don't know what a Spheroid is but on the PT2s you only need to cut the end to the proper length then fluff them up a bit and I put the rubber cup on upside down to prevent the cup from squashing the fluffed up rayon stubs. And don't use any "flavor wicks" they are just not needed with rayon wicks.
Also if you get it right you will also solve any leaking problems you may have had with silica.
Pt2 doesn't need any special trimming because of the length of the wick is short. The difference is that you do NOT need an over wick, even with a 1/16 coil, the right amount for the coil is plenty for the channels.
The spheroid is one you can probably get away without thinning a lot since the wicks point up to the filler. Actually it may necessary not to thin too much so that they are stiff enough to stay pointed up. Maybe just a diamond cut like trusound's wick pictured above. You'll have to experiment we don't know of anyone using it in a spheroid yet... Try rayon as the filler material it should work really excellent there too.
Most important is to get the right density in the coil; then you can work on tailoring it for longevity .
The spheroid is one you can probably get away without thinning a lot since the wicks point up to the filler. Actually it may necessary not to thin too much so that they are stiff enough to stay pointed up. Maybe just a diamond cut like trusound's wick pictured above. You'll have to experiment we don't know of anyone using it in a spheroid yet... Try rayon as the filler material it should work really excellent there too.
Most important is to get the right density in the coil; then you can work on tailoring it for longevity .
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Using rayon in a Spheroid can be a pita when the wick shrinks and eventually ends up flattening. That's not to say that you can't make it work. I just find that it's takes more effort than I'm willing to give. So I tend to stick to other wicking material for my Spheroid only. It would be nice if rayon worked well, as it's exceptionally better than other materials, imo.
I can see it being tricky In a spheroid. But possible if your willing to figure it out on your own. Because none of us have one to be able to give tips.... But even though I only have 3 types of attys at my disposal, my knowledge of how the wick works usually helps with trying rayon in atties that haven't been done before... And based on the experience that xploit shared I have an idea.
The rayon is in a way moldable like clay. I think it can be trimmed in a way that would force the wick to stay stiff and pointed to the sky it would have to be a thicker amount maybe but It's all about the way you cut it and once it's saturated it should stay in that form because once the dry fibers are wet they sick together.
Almost like building a skyscraper, Each strand is a vertical support beam, If it's tiered properly with angle cuts but a thick core - I think it will stand at attention.
You have to get used to how extremely fluffy the tails look but then they come together when wet with juice. I think the key is going to be wetting the wicks holding them in the position you want while its upside down. Once the wick is fully saturated after soaking the crap out of it with juice.. It should stay that way..
Hope it helps!
The rayon is in a way moldable like clay. I think it can be trimmed in a way that would force the wick to stay stiff and pointed to the sky it would have to be a thicker amount maybe but It's all about the way you cut it and once it's saturated it should stay in that form because once the dry fibers are wet they sick together.
Almost like building a skyscraper, Each strand is a vertical support beam, If it's tiered properly with angle cuts but a thick core - I think it will stand at attention.
You have to get used to how extremely fluffy the tails look but then they come together when wet with juice. I think the key is going to be wetting the wicks holding them in the position you want while its upside down. Once the wick is fully saturated after soaking the crap out of it with juice.. It should stay that way..
Hope it helps!
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Paul, you probably already mentioned it, but what diameter coil are you using in your PTs? I use a 14 gauge needle, .083in/2.108mm, and it works like a champ! I've got about 15ml of El Toro Cigarillos through one and it's still vaping like it did on the first hit running 9 watts on a 134.
That's what I do with the needle, leave it in the coil with the air tube holding everything in place while mounting. then thread the cellulose, trim it tight to the cup and go! I'm working at 2.4 ohm spaced coils with 32 gauge Kanthal as well. It seems to be a great setup in the PT, way better than stock.
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