Looking at a recommended ohms/voltage chart and confused.

[teknologik]

I just started with a rba, and I built a 4.4 ohm coil because the minimum you can set the dna3 that I just got is at 7watts. What is the recommended range for a 4.4? I seem to be getting the best vape at like 8.9watts but I want to make sure I am not vaping it too hot. I looked at this chart http://www.ecigadvanced.com/community/wp-content/uploads/2012/07/power.jpg and it seems to be recommending nothing above 8.4?

Am I even doing this right? lol

 

[Btsmokincat]

Holy 4.4! That coil must be 20 wraps wide!

Those charts are misleading for someone using a device such as yours. I'm pretty sure the DNA30 can handle as low as a .5 sub-ohm coil. What kind of RBA are you using?

 

[teknologik]

Its about 12 wraps but they are big wraps, 1/8. the rba is a russian 91% . Why is my device different? I realize I am like a child with a complex device here but I figured it was a good way to learn. This forum has helped a lot.

 

[beckdg]

thin wire with high resistance and little air flow is common among replaceable heads, cartos, etc.
it also heats up to scorching temps a lot easier and needs a lot less wattage to function.
though, functionality is limited to a lot less vapor and/or flavor production compared to some RDA/RBA setups.

with RDA/RBA setups such as the russian/kayfun, genesis style, etc., it's possible to use thicker wire with less resistance that produces much lower temps at the same power. so you need more power, and you get a lot more surface area to produce more vapor. increase the air flow a little and you have a balance capable of producing great plumes of vapor with fantastic flavor.

setups like these often shine in the 15 to 50 watt range depending on build and components. in something like a kanger protank with stock heads, you'll burn at 10 watts, almost guaranteed.

 

[Btsmokincat]

The device could matter because lots of people have experience with what builds work best for certain RBA's. Like your russan, I have two Kayfun Lite's (essentually the same thing) and after months of builds I've found that 1.3 to 1.8 ohm coils work best at 10 to 11 watts on an MVP2.

I think you will find a much better vape in that Ohm area. We really need some DNA30/Russian-Kayfun users to chime in what what worked best for them.

 

[Jeffk123]

I use my R91 at about 1.2-1.3 ohms thats about 6 wraps on my 3/32 drill bit it gives me a nice warm flavorful vape and if I do a carbed lung hit it really chucks the clouds. 4.4 ohms holy moly that must get hot
Edit: I usea a 20watt device set to about 13.2 watts if that helps and. I used 28g A1 kanthal

 

[teknologik]

Is it safe to vape this juice at 4.4 until its gone at least? The clouds are certainly sufficient. I just wanted to make sure vaping at 8.3-9 watts didnt just burn everything up.

Also, I am using 30 gauge kanthal. I think i may have burned some cotton when I cranked my vamo up to 8 watts on a 2.4 and it had me nervous.. i'm still trying to figure this stuff out.

Also the advice on this forum has gotten me this far, I appreciate the replies.

 

[Jeffk123]

Is it safe to vape this juice at 4.4 until its gone at least? The clouds are certainly sufficient. I just wanted to make sure vaping at 8.3-9 watts didnt just burn everything up.

Also, I am using 30 gauge kanthal. I think i may have burned some cotton when I cranked my vamo up to 8 watts on a 2.4 and it had me nervous.. i'm still trying to figure this stuff out.

Also the advice on this forum has gotten me this far, I appreciate the replies.

I would say its fine so as long as your not roasting that cotton lol.

 

[Btsmokincat]

As long as you're not getting burnt/dry hits it should be alright to finish off that tank using the 4.4. That is the one downfall to Russian/Kayfuns, they aren't easy to empty.

For me 30 gauge is perfect in a Kayfun. I make a 6 or 7 wrap microcoil around a 2mm micro screwdriver (5/64 drillbit is about the same size) comes out to 1.5 to 1.8 Ohms.

 

[teknologik]

So how are you guys not burning 1.5-1.8 ohms at 7+ watts?

 

[p7willm]

Those charts could be considered a starting point. You are not going to break anything. The worst that, probably will happen for all the lawyers to cover my a.., happen is that your coil will burn out.

See where YOU like the experience. Try higher and lower watts. Then build a coil with lower resistance and compare it to the first at different wattages. If you are away from charging factor in that lower watts will last longer on a charge. Try a different wire guage and build various resistance. When you find a build you like see if you can find other people who like the same thing and see what other attys they have and use their builds on them as starting points.

By the time you have your Russian completely figured out there will probably be a new atty you want to try or it will be time to get into dripping or you will be going back to an EVOD. You need to find the balance between flavor, cost, vapor, ease, and a hundred other things that is right for you.

You also must not be afraid to ask "stupid" questions. All of us here were "stupid" at one point. There is a huge difference between not knowing and being stupid. Not knowing can be fixed but stupid...

It's a journey not a destination.

 

[Jeffk123]

So how are you guys not burning 1.5-1.8 ohms at 7+ watts?

Depends alot on the juice and the air flow I use 100% vg diy stuff and I just leave that air all the way open on my R91 are you sure you are wicking the russian right? No cotton in the channels and making sure its not to thick for the coil?

 

[teknologik]

Depends alot on the juice and the air flow I use 100% vg diy stuff and I just leave that air all the way open on my R91 are you sure you are wicking the russian right? No cotton in the channels and making sure its not to thick for the coil?

I've just started really getting the wicking down. For the first 3 weeks of having the rba the center pin was messed up and I spent hours thinking I was doing coils wrong etc! Probably 12+ hours of just pulling my hair out, heh

 

[Jeffk123]

Is it a v2? I have heard they have a resistance issues with the center pin. Anyways you will get it try adjusting juice or.air flow see if that helps. But if 4.4 ohms works for you.by all means go for it.

 

[Gargoyle]

I find on my EhPro KayFun Clone that anywhere from 1.2 ohms, to my current 2.4ohm builds work fine. You just adjust wattage to taste. I have found that lower ohms require less wattage to run well and more ohms require more watts. (pretty simple right?)

The hard part for me was learning the airflow and wicking that worked best for me. I don't think there is a wrong way to do it really. You just need to play with builds till you find what you like and are happy with. Took me about a week, 4 coils (which I have saved), and about 20 wick jobs to nail it!

Youtube some videos about coil building and wicking. Some of the most helpful for me were rip trippers videos, and a video showing how to build a "navy nest" wick.

Hope you find your happy spot!!

 

[novamatt]

I'm surprised nobody's spelled it out like this yet, but when people say that chart doesn't apply to you, what they mean is this: the chart is for clearomizers - thinks like a kanger protank, aspire nautilus, or iclear 30. They burn at much lower power settings than rebuildables. Your Kayfun can take much more. I run mine on my Provari with 2 ohm coils (10 wraps of 28awg in a 3/32 bit) at 4.6 ohms, which is about 10.5 watts, and many people run significantly higher.

If it's burning, you'll taste it. If it's not, you're fine. Find the settings you like the most and toss the chart.

 

[AaronY]

Use a Ohm law calculator. I have been vaping at above 20w for years and my equipment is fine.

 

[Rule62]

Those vaping charts were developed back when standard vaping gear was via tiny coils, confined to tiny chambers, with little air flow, such as cartomizers, clearomizers, and the like. If you are using that type of equipment, the charts are still good starting points. However, with today's RBAs and RDAs, with their large chambers, increased air flow, and improved wicking, the charts are pretty much useless.