Help required Kayfun and diy coils

[djj1980]

Good evening fellow vapers

Yet again I require some help for me and my fellow vapers.

We have decided to take the plunge by getting into the DIY phase of the vapeing world.

However we are short on knowledge and require some help.

We are all running the same batch of materials and the same tanks the only anomaly is the batteries.

The wicking material is cellucotton.

The coil is 5 turns of kanthal 0.25mm 30awg around 2.5mm drill bit resistance range 1.3 -1.6 OHMS.

tanks are Kayfun 3.1 clones with pyrex tanks

· (HELP please tanks are leaking through adjustable air hole – even though O-Rings are seated properly and in good condition)

Now the anomaly

Mate and daughter SEEGO G-HIT 3.7 Volts

Me –Sigelei Legend Gravity V2 – set @ 4.7 volts (Unit is under performing by 1 Volt)

E-juice shop bought PG/VG 70/30, 8 Mg Nicotine. (unsure on Flavour %)
Flavour - Black liquorice & Blueberry Menthol 50/50 mix.

Now the problem
Seeing as all three tanks and setups are the same I would expect a trend of problems, however that is not the case.
The setup with sigelei Legend tastes burnt with brand new coil and wick no flavour what so ever.
Mate and daughter no burnt taste at all high flavoured taste.

· The coils are 1.5 ohms battery at 4.6 volts (actual 3.6 volts) that means wattage at 2.4 watts.
· Push the Voltage up and the same problem.
· Tried flavour in RDA and the twin micro-coil set up sub ohm is immense.
· Tried the same tank and coil on my mates battery and still the same problem.

So the questions

1. Why is it 1 out of 3 setups tasting burnt?
2. How can we resolve this.
3. When we go Zero Nicotine by DIY flavour, Are we likely going to get the same problem and what should we watch out for.

 

[retic1959]

At 3.6 volts and 1.5 ohms your wattage is actually 8.64 watts pulling 2.4 amps , how do you know the unit is off by a volt ? 4.6 volts at 1.5 ohms can be too hot for some juices . Check to make sure the insulater under the positive block is lined up properly , if there's a gap , juice can get underneath and work it's way out , also check to make sure your chimney is making proper contact with the o-ring in the topcap , there's been issues with the chimney being too short on some clones lately , putting an o-ring in the chimney may give you the extra height needed for full contact with the topcap .

 

[joesquid]

For the leaking...you have an air leak somewhere. Think someone on here filled their tank with water, plugger the air hole and blew into the tank to find the leak. Seems like it would work to me.

I think the obvious answer to the burning is to turn the voltage down.

 

[djj1980]

The voltage was checked on a resistance and voltage tester. and even though the digital display on the unit shows 3.6 volt it tests at 2.6 volt.

Thought ohms law showed volts divided by resistance that would mean 3.6 divided by 1.5 ohms??? (V=I x R) (I =V /R) (R=V/I)

Is there a different calculation i should be using??

Top cap has connection to the chimney and the base insulator under the positive block is lined up. (so no gap present)

Ty for your help PV Master

If i go back to the same setup on my old tank with cartomiser at the same voltage the E-Juice is fine.

 

[djj1980]

will give the water trick a try and see if that is true as that is viable considering they work on a pressurised system.

TY to all of your help

 

[DaveP]

My first check would be to draw hard on the drip tip while pressing my thumb over the air intake hole. If you have an air leak, you will sense little resistance to your draw. Draw should be extremely tight when you do this and it should create air bubbles coming from the bottom of the chimney (juice going into the chimney and air escaping). If the tank o-rings are good, check the o-ring inside the top cap where the small chimney tube goes. There have been occasional missing o-rings in that position on new tanks.

I wind the coils for my Kayfun 3.1 with 28ga wire and generally end up at 1.8 to 2.0 ohms. I don't mind lower resistances, but that makes me vape in the low end of the voltage range. On my Provari, anything less than 1 ohm generally is rejected by the logic and produces E1/E2 codes.

If I vape 80pg/20vg and 50/50 juices I can go up to 4.5v at 1.8 ohms with great flavor. With 100% pg juice 3.7v is much better. 4.5v starts to get hot and flavorless with 100% pg. At 1.3 ohms you may be pushing the envelope for wattage on your juice at 4.7v. That's 16 watts. Your wick may not be keeping up with the heat.

The first thing I'd check on the one that is tasteless is whether the wick is actually touching the deck on both sides of the coil. Hot, burnt taste is almost always a wick that is going dry (or is vaped with excessive voltage).

Build your coil and wick according to the link below and give it a try. The vertical fibers touching the deck will wick just fine at higher voltages. Remember, if your juice is thick (high VG content) wicking will be less efficient and you might have to do a primer pull here and there to keep it saturated. Put your finger over the air hole and draw hard once or twice without pressing the fire button to draw juice into the wick. You should see air bubble rise from the bottom part of the chimney when you do this.

http://www.e-cigarette-forum.com/forum/tutorials/503153-kayfun-3-1-microcoil-cotton-guide.html

 

[FallenRawToast]

airflow can also be the difference, if you arent pulling enough air over the coil/wick area as you fire, it will burn up too quick.

I am also wondering about this 1 volt difference you think your sigelei has.

Besides you are comparing a stick batt setup your mate and daughter have to a APV vw/vv that you have.... I am sure the sigelei also works faster at heating up the coil that the stick batts do, since it has a much higher amps threshold, so it can delivery the "power" quicker.

 

[FallenRawToast]

The voltage was checked on a resistance and voltage tester. and even though the digital display on the unit shows 3.6 volt it tests at 2.6 volt.

That Sigelei Legend only goes down to 3volts first of all. Did you test it under a load or not? The solution here, is just go with a lower watt/volt setting on the sigelei.

 

[readeuler]

Burning only happens when there isn't enough liquid on the wick. It wicks fine at 3.7 volts, but not at 4.7 volts: your wick can't keep up at the higher voltage. Less wick generally means better wicking; you have trouble running trough a crowded hallway, right? So too does liquid, running through a hallway crammed with callucotton.

Conversely, if the tank is holding a good vacuum (o-rings working properly, etc) and you're experiencing leaking, then there's too much liquid on the wick! There are a few ways to try to fix this: namely more voltage (vaporize more liquid, less hanging around), or thicker wick (harder for liquid to get through).

Whether you DIY and regardless of the nicotine strength, these types of issues are possible. Your coil could also be sitting a tad low to the air hole.

Keep us posted!

 

[DaveP]

Kayfun 3.1 has o-ring 4c inside the top cap as shown in the picture. If this is missing or too small to seal against the air tube on the chimney, that's your problem.

 

[djj1980]

DaveP the O-Ring is present and in good condition (Visual Inspection)

Fallenrawtoast the sigelei was tested under load with a full battery.

Rebuilt the tank two or three times and changed thickness and amount of Wick and material is touching the Deck,

also transfered the tank onto my mates battery and the same result.
the tank is gurgelling a bit so i am assuming too much fluid on the wick but still a burnt taste. however same batch of fluid in my mates and no issues.

Very frustrating at the moment.

 

[djj1980]

At 3.6 volts and 1.5 ohms your wattage is actually 8.64 watts pulling 2.4 amps , how do you know the unit is off by a volt ? 4.6 volts at 1.5 ohms can be too hot for some juices . Check to make sure the insulater under the positive block is lined up properly , if there's a gap , juice can get underneath and work it's way out , also check to make sure your chimney is making proper contact with the o-ring in the topcap , there's been issues with the chimney being too short on some clones lately , putting an o-ring in the chimney may give you the extra height needed for full contact with the topcap .

My apologies Retic1959 on the ohms law point i forgot all about the wattage calculation ..............

W (watts) =A (amps) x V (volts)

still have not resolved the issue, tried the water trick to leaks and no air.
Rebuilt the whole unit and still teh burning taste even changed to thinner and thicker wick.
Seriously have doubts over teh tank and potential of manufacturing waste still on material. going to soak it for a week or two in alchohol, will keep you informed.

 

[joesquid]

Have you dry burned your coil to ensure you don't have a hot spot?