Understanding coil heads

[VapeCrusader]

I'm trying to get my head around coil heads, tried google but most results will be guides, which I'll read but don't give all the answers I'm looking for.

More or less, I'm trying to understand at what point does the VG/PG ratio of juice really need to change in terms of coil used.

Below 1 ohm/ sub ohm coil = HVG juices only? No higher than 50% PG? As could cause flooding/ crackling kettle effect? High PG too thin for sub ohm vaping/ DTL?

Above-ohm coil = higher PG juices only? High VG too thick for these coils to heat and vaporize?

 

[Hedders]

Ooh, great thread! I am all ears!

 

[nwhornet]

General rule would be the smaller the juice holes in the coil the thinner the liquid to allow adequate wicking.

 

[scrumpox]

I wouldn't correlate the resistance of a coil and juice PG/VG ratio at all.
Getting the optimal ratio for an atty (and its atomization capability) is all about juice flow and wicking, not the metal composition of the wire.

 

[Fuctifino]

Long story short - don't over think it

50/50 is a general rule of thumb for many setups

if your tank leaks badly or you feel you are allergic to higher PG then "maybe" increase the VG
to change the viscosity a bit or ratio etc.....

ratio stuff is not set in stone that you should or must increase this or that if you use this/that coil
more on the tank/setup style than just the coil being used & other factors

years ago the thin CE4 pen stick mods needed more of 70pg to wick properly in thin wall atomisers
as tanks have evolved the 50/50 has become the new norm as tanks have improved blah blah blah

I DIY'd a 60vg 40pg to give me slightly better chance of less leaking/weeping in MTL RTA's I was having a bit of hassle with
now I've learned those tanks qwirks & how to build/wick better etc.... the leaking has ceased so could easily use 50/50 or even 40/60

I'm using that juice in a 0.8 stock coil to a 1.6 rta - vapes perfectly fine
think I have come to realise that the various tanks themselves more than maybe the coil/ratio is why they produce slightly different vape results
still good results once you learn each tank's qwirks but the experience is still slightly slightly different

think we have all fucked about trying this & that & overthinking stuff too much at times - which my essay demonstrates

what I'm trying to say is there is no written law that the moment you dip below 1.0 Ohm you MUST increase this/that - nope
maybe below 0.5 Ohm chucking out plumes of stuff, you might feel you want a higher viscosity or something
but that is just as much down to your tank/setup and your own decision than some rule/guidelines.....

ya see what happens when you over think shit way too much - you become fluent in waffling bollocks at great lengths

 

[nickp87]

There no hard rules, just general guidelines as Fuctifino says above.

PG gives a harsher throat hit, and most sub ohm coils usually run at higher wattages and burn a lot more juice which is another reason for the different ratio's

 

[Deaf Vaper]

I would add that, it's nic strenght that's more relevant to different resistance coils being used. Ideally, if one has a sub ohm coil fitted (-1.0 ohm), then one should reduce the nic strenght to 6mgs or less, and higher nic strenght for coils above 1.0 ohm...typically say 12mgs or higher with 1.5 to 2.0 ohm coils, depending on your own needs, past smoking consumption etc. The thickness of juices as Fuctifino says is largely irrelevant, it just depends on how well a particular coil can wick higher VG juices.

 

[Andy S]

PG has a harsher throat hit especially when it's very hot so many people prefer less of it the more power they use. As for coil heads, tight wicking and/or small juice holes means it won't soak up thick juice as quickly as thin juice. On the other hand if you put thin juice on a coil with big holes it'll gurgle and/or leak. I think it's about time the manufacturers did some proper testing, i.e. filling tanks and leaving them for a few hours to see what leaks and what doesn't, and then chaining them to see how long they take to wick up with 50, 60, 70, 80 VG. It's all very well them putting recommended wattages on everything, that's really not very relevant because you can easily adjust it if you don't agree, but once you've bought your juice you're kinda stuck with it so it would be nice to know in advance what's going to work on the coil you're planning on using.

 

[scrumpox]

I think it's about time the manufacturers did some proper testing, i.e. filling tanks and leaving them for a few hours to see what leaks and what doesn't, and then chaining them to see how long they take to wick up with 50, 60, 70, 80 VG.

From first hand experience I know that some manufacturers will do testing on a variety of ratios and various tests for leaking. This is a more complex area than you might think ... the viscosity of VG can vary a lot, the ambient temperatures at which people vape worldwide can vary a lot. Therefore, a PG/VG ratio for a coil head would be a very stupid thing to recommend or even suggest.

After testing, a recommended power range, or a maximum, is a very sensible thing for manufacturers to set. Isn't it up to the vaper himself to work out what ratios of juice work best in any atty for him/her and adapt instead of blaming the manufacturers if anything goes awry?