Atlantis V2 coils & Smok VCT 0.3 ohm coil defference

[Xcighippy]

Can anyone tell me why the difference in recommended wattage is so great between coils of the same ohm (o.3) .
Atlantis V2 coils say 0.3 ohm = 60 to 80 watts
smok VCT coils say 0.3 ohm = 15 to 25 watts
I thought the lower the ohm's the higher the wattage needed. Am I wrong in my thinking? If so please school me

 

[Katmar]

Bump and good luck....

 

[Xcighippy]

Thanks for the bump. Thought someone on here would know this.

Sent from my SAMSUNG-SM-G900A using Tapatalk

 

[Douggro]

I'm not a coil expert, but it looks like the VCT coils are all SS while the Atlantis coils are Kanthal. Plus differences in wraps and wire gauge could be the reason.

 

[Xcighippy]

Thanks Douggro. I just assumed that resistance was resistance regardless of material used. The difference in wraps and wire guage also applies too. The thinner the wire, the more wraps is needed to lower resistance. The thicker the wire, the less wraps needed to achieve the same resistance. In my mind, it shouldn't matter, the amount of amps needed to fire them should be the same, or so I thought. Guess I don't know as much as I thought I did about this.
Anyone know what I'm missing?

 

[Douggro]

Resistance is very specific to the material, gauge and length. What you're missing is when you change any of those properties to reach a certain coil resistance it also changes the amount of power needed to heat the coil to a given temperature. I don't wrap coils (yet) but I understand that you can get the same resistance with 26 and 28 gauge wire of the same type by altering the number of wraps, thus changing the respective lengths. You also need to distribute the heat load of the coil across enough area to avoid overheating/burning it, and that's affected by the wire gauge and thermal properties of the wire.

Just think about light bulbs: changing the filament material and length changes the output (wattage) with the same 120 volts being applied.

 

[Xcighippy]

Thank you again Douggro. Good analogy with the light bulb. I have rebuilt lots of coils but only use Kanthal. The VCT coils do use 304 SS That must be the difference. Didn't notice that until you brought it to my attention. Thanks