Goblin RTA + vertical coil problem

[tstr]

Hi, I'm new here so I couldn't post to correct thread, but I hope I can find help from here.
So my problem is that after reading about Goblin and vertical coils here I decided to try it myself. Everything went great: great flavor and lots of vapor. But after a tank or so I cant get any flavor. I tried to dry burn the coils and re-wick but no change. I've made about five vertical coils now and with every one the problem arises after a tank or so.
I am currently using Goblin RTA, 26G Kanthal, 2,4mm ID, 6-8 wraps and muji cotton. Mod is Sigelei 150W at 50W.
Anyone have any idea whats the cause?

 

[Waddle]

From what I've read it may be a lack of cotton around the coils.



(not my picture ...borrowed for illustrative purposes )

 

[Jimi D.]

Have you tried turning down the wattage ? Higher heat will scorch the flavor.

 

[Waddle]

I find with my Goblin (horizontal coils) the flavour doesn't pop till around 45~50 watts (85% VG).

 

[tstr]

Waddle: I've tried with lots of cotton and little cotton. Both work at the beginning but flavor disappears after a while.

Jimi D. But why would the flavor be great at the beginning? If the wattage was the reason, it would not taste so great at any point.

 

[Waddle]

Somewhere along the line there is a saturation problem. Are you getting dry hits? Your juice is shaken well before you reload?

 

[tstr]

No dry hits, I could try the juice shaking but I never shake it so it seems unlikely. Building a new setup now, will report if it's the not shaking causing the problem.

 

[Jimi D.]

Waddle: I've tried with lots of cotton and little cotton. Both work at the beginning but flavor disappears after a while.

Jimi D. But why would the flavor be great at the beginning? If the wattage was the reason, it would not taste so great at any point.

Because it was a fresh coil to begin with. Coil gunk will mute the flavor.

 

[Waddle]

Flavours can settle in the bottle. I always shake mine before every re-fill.

 

[tstr]

No flavor even with new setup, have to try and make some new liquid if that's to blame.

 

[tstr]

Nope wasn't that.

 

[Waddle]

My next step would be to try with horizontal coils.

 

[tstr]

I've never had the same flavor with horizontal coils as I had with vertical coils ( for one tanks duration), but maybe I just have to switch back.
Any good builds for flavor+clouds? I usually just wrap 7-9 wraps of 24G with 2,4 ID.

 

[Waddle]

I thought that maybe if you tried horizontal coils you might be able to eliminate the juice being the problem. Twisted 28ga always seem to give me enough flavor.

 

[tstr]

I made a twisted 28g, 2mm ID, 7wraps and tested my new juice. OK flavor but not as good as with verticals in the beginning. New juice didn't taste at all with the latest vertical build.

 

[Waddle]

Well here is how I understand it.

Heat is what makes the flavour compounds and the PG they're suspended in evaporate. Without the heat there is little taste. Surface area is required for that heat to move into the juice.

Airflow is required for proper evaporation and cooling, both on the surface of the coil and the surface of as much of the liquid as possible. You can get some evaporation with just airfow and no heat! Exposed surface area is important here too of both coil and wick. Spaced coils can be better, as it creates mini juice wells between the wires, and heat radiates out sideways into these, even more room for evaporation.

Try turning your air flow down and see if that improves your flavor.

 

[tstr]

I tried turning the airflow down with airflow control ring but it didn't help with the 2,8mm coil but it didn't have any effect on the flavor. Will probably be trying the twisted 28g with 2mm id on vertical coil next time as it leaves some space automatically. Maybe the problem is there. Will see.