Heat dissipation, SS316L vs Ni80

[Kazuko]

Hi everyone,

I've been using Ni80 fused clapton for quite some time, and came to find a build that I really enjoy, except for the heat dissipation : it takes forever to co down after I vape it.
It also makes the coils behave very differently when they're warm and when they're not : 90W are fine for the first puff, but when the coils are warm, 70W or more give me a really hot vape.

I was wondering how SS compares to Ni80 on that aspect. I will probably buy the SS version of my Ni80 wire anyway to try it out and see for myself, but I'm curious about your experiences, it could also avoid buying a spool of wire I will never use if SS is worse...

Also, to compensate for the behavior changes when coils are cold or hot, I'm considering using SS in VV mode, as warm coils will have higher resistance, it'll result in less watts, and may give me a more consistent vape

 

[zoiDman]

Just like Many People call how Fast a Coil Heats up "Ramp Up", a Lot of people call the Heat Dissipation "Ramp Down".

And most people agree that for a Similar Hit, SS has a Faster Ramp Down.

So if you Don't Like the time it takes a NiChrome 80 Coil to Ramp Down, I would Definitely suggest you try a Similar Coil in SS.

 

[dripster]

From Steam Engine:

Heat capacity
The higher the heat capacity, the slower your coil will be to heat up (and to cool down).

To be able to do a fair comparison, make sure to use the same wire length and thickness for both metal types. You'll quickly find out that, if most people agree that SS cools down faster, then what that means is most people are obviously wrong.

 

[Zaryk]

You could also go with the tried and true method of releasing the fire button a little before you end your draw, which will pull air across the coil and cool it off faster. Your coils, while ramping down, will still produce vapor.

 

[Zakillah]

70W on proper sized dual coils and enough airflow shouldnt be "hot", no matter the material.

What type of wire is it, gauge wise? It might help to go for thinner wires, especially on the wrap. Lots of metal will result in lots of heat. The thinner the wires, the less mass the coil will have and the less excess heat it will produce.
There is some decent pre-made fused clapton wire available; something like 3 x 30G with 38G wrap.

You'll quickly find out that, if most people agree that SS cools down faster, then what that means is most people are obviously wrong.

Pfff. Physics. Get out of here with that.

 

[Kazuko]

70W on proper sized dual coils and enough airflow shouldnt be "hot", no matter the material.

What type of wire is it, gauge wise? It might help to go for thinner wires, especially on the wrap. Lots of metal will result in lots of heat. The thinner the wires, the less mass the coil will have and the less excess heat it will produce.
There is some decent pre-made fused clapton wire available; something like 3 x 30G with 38G wrap.

I know the wrap on this wire is too thick, it's a 2*26/34 fused clapton wire, I run it with two 5 wraps 3mm ID, in a wide open Drop RDA, and I do pull when I take a puff, I'm not just letting the vape come to me, I pull it hard.

I also have a 2*30/38 wire, but the cores are too thin for my likings, and it's hard to find a wire with 26 or 28 core wires and a wrap thinner than 34. I actually only found the Vandy Vape 2*26/35, a friend of mine has it and told me he also has trouble getting a consistent vape when the coils are hot and when they're not.

Rebuildable is not something lots of people seem to like in France, so there aren't lots of good choices in terms of wire... Loads of Chinese made wires with questionable gauges all over the place. The only Chinese wire maker I found to make decent choices for their gauges is Coilology. I ordered a 3*26/36 Ni80 fused clapton wire on FT very recently, purely for cloud chasing, and hopefully the vape will be a little more consistent, with a thinner wrap and another core wire. I know the ramp down will be even worse though

 

[Zakillah]

I also have a 2*30/38 wire, but the cores are too thin for my likings

How so?

 

[Kazuko]

How so?

Not enough surface area, so no-go for my cloud chasing urges, and the wire is a pain to work with, it's too springy and gets warped too easily when I wick it. I do use that wire in my Ammit 22 though, as it is a restricted draw and a narrow chimney, I'm not aiming for clouds with this RTA, but I won't use it on an airy atty like the Drop.

 

[Zakillah]

Thick wire having larger surface area and giving bigger clouds is a missconception that seems burned into alot of vapers minds. Even more wrong if you use Claptons, as you wrap over them anyway. To compensate the thinner wires, just add a wrap or two. If the coil size stays the same, you'll get at least the same clouds as with thicker wire cores. Plus, not as hot a vape.

I have a spool of that NiCr80 3 x 30 with 38 wrap. Its pretty easy to handle.

 

[Kazuko]

Thick wire having larger surface area and giving bigger clouds is a missconception that seems burned into alot of vapers minds. Even more wrong if you use Claptons, as you wrap over them anyway. To compensate the thinner wires, just add a wrap or two. If the coil size stays the same, you'll get at least the same clouds as with thicker wire cores. Plus, not as hot a vape.

I have a spool of that NiCr80 3 x 30 with 38 wrap. Its pretty easy to handle.

I tend to build similarly on my regulated and mech, in case I want to change the device I use any RDA on, without having to rebuild. Thinner gauges get the resistance really high really quick, the build I have on my RTA is .78ohm (single coil), and I vape it at 30W, any less is not even fun to vape, so really not suitable for mech use, and it's not even a very cloudy build, even for a single coil.

I may give 2*28 or 3*28 a shot though. I'll probably just buy a spool of each on FT.

 

[dripster]

Pfff. Physics. Get out of here with that.

I see what you did there.

 

[dripster]

For bigger clouds without getting too much ramp up nor cool down, I tend to experiment with cable-like complex variants of known build types such as the tiger build. The "cable-ness" obviously does make it more floppy and more springy, especially as you increase the number of wraps, but I have been able to get up to 11 or 12 wraps without becoming too unstable to be called safe enough for the mech, although these types of builds can be a major stunt to get the wraps lined up evenly and straight, and, I have to use my fingernail to rewick to prevent the coils from getting bent out of shape, but the clouds are amazing on a quad battery tube mech and the coils are neither searing into the cotton wicks nor giving a toasty vape because that's exactly what all the small crevasses are there for.

 

[dripster]

An example.

 

[Kazuko]

Those wires aren't widely available in France either, I'll try and see if any vendor I trust has them. I'll probably just end up buying a spool off FT as well

 

[dripster]

Those wires aren't widely available in France either, I'll try and see if any vendor I trust has them. I'll probably just end up buying a spool off FT as well

The best Nichrome 80 wire (real premium quality Sandvik Nichrome 80 wire from Sweden), and that has been spooled properly (no kinks in the wire, and no tangled-up mess either) is this:
Wireworks – Wireworks product site

The owner of this Belgian vape shop, whom I trust more than I trust my own family, is also the owner of the Wireworks brand:
Wireworks Nichrome 80 kopen bij Vapuri | e-sigaretten en e-liquid
Shipping to France on orders starting from 75 Euros is free, and below this it is 6.95 Euros:
Verzendkosten - vapuri

 

[Kazuko]

Thanks for the links, I'll definitely check that out! I should indeed try and see what's available in the EU, shipping are usually pretty low compared to US vendors. I'll need help from Google Translate though