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Proper Wattage for a 0.4 Ohm Build

Discussion in 'General Vaping Discussion' started by thegreatappreciator, Nov 22, 2014.

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  1. thegreatappreciator

    thegreatappreciator Senior Member

    Aug 25, 2014
    Fort Payne, AL
    Hey folks, I'm new to the rebuilding game so I need some help. I have a Tugboat that has a .4 ohm dual coil build in it. What wattage do I need to run it at? I have a Hana V3. The cat at the local brick and mortar says 30 Watts, but every time I try to fire it, the battery dies out. What do I need to do for safety and optimum flavor?
     
  2. Necrotic

    Necrotic Ultra Member Verified Member ECF Veteran

    Apr 16, 2014
    Lawrenceville, GA
    To figure wattage it is simply (VoltagexVoltage)/resistance = wattage. So (4.2x4.2)/.4=44.1 watts. This is on a freshly charged battery with 0 voltage drop. Say voltage drop is .2 under load then it would be 40 watts.
    But really it all depends on the wattage you prefer. Flavors change at higher wattages. 30 watts is good enough :D
     
  3. thegreatappreciator

    thegreatappreciator Senior Member

    Aug 25, 2014
    Fort Payne, AL
    Thats the problem though.....a fresh battery (purple Efest 18650) will not push it. The screen just goes blank.
     
  4. Necrotic

    Necrotic Ultra Member Verified Member ECF Veteran

    Apr 16, 2014
    Lawrenceville, GA
    Is this a hana clone? The 0.4 ohms might be pushing the amp limit of the chip.
     
  5. thegreatappreciator

    thegreatappreciator Senior Member

    Aug 25, 2014
    Fort Payne, AL
  6. Necrotic

    Necrotic Ultra Member Verified Member ECF Veteran

    Apr 16, 2014
    Lawrenceville, GA
    What is the voltage that it is trying to push? I really think its pushing the amp limit of the DNA30 chip
     
  7. wshanncap

    wshanncap Super Member Verified Member

    Oct 28, 2014
    Ohio, USA
    Try using this calculator. The coil under unregulated firing would be firing at about 34 watts. That's a little hot in my book. I wouldn't run it over 20 watts. :2c:
     
  8. Asbestos4004

    Asbestos4004 Vaping Master Verified Member ECF Veteran

    Sep 11, 2013
    Sugar Hill, Georgia
    The real deal doesn't want anything below a .5 ohm build. That's the problem. Build it at a higher resistance.
     
  9. thegreatappreciator

    thegreatappreciator Senior Member

    Aug 25, 2014
    Fort Payne, AL
    Trying to run it at 30, but I suppose my question is it acceptable to run it at a lower voltage that won't crash the battery?
     
  10. Necrotic

    Necrotic Ultra Member Verified Member ECF Veteran

    Apr 16, 2014
    Lawrenceville, GA
    That's what I thought... The resistance is to low causing the chip to try to push amp limit but instead it just shuts off... Just rebuild with more wraps and aim for around .55 ohms or higher
     
  11. joelmora89

    joelmora89 Senior Member Verified Member ECF Veteran

    Aug 11, 2013
    tracy,ca
    I'm running a .4 at 35 watts but it all depends on the atomizer . I have a mephisto all open and it's nice a cool
     
  12. thegreatappreciator

    thegreatappreciator Senior Member

    Aug 25, 2014
    Fort Payne, AL
  13. joelmora89

    joelmora89 Senior Member Verified Member ECF Veteran

    Aug 11, 2013
    tracy,ca
    I think you should a 2 more wraps per coil and get like .6-.8 at 30 watts to get the full potential of a dna 30
     
  14. Necrotic

    Necrotic Ultra Member Verified Member ECF Veteran

    Apr 16, 2014
    Lawrenceville, GA
    Glad we could be of some help :D Sorry I'm not to knowledgeable on the DNA30 chips
     
  15. Susan~S

    Susan~S ECF Guru Verified Member ECF Veteran

    Mar 12, 2014
    Mpls/St.Paul, MN
    Just a FYI for you. If your purple Efest batteries are 2500mah they only 20A continuous, not 35A as printed on the wrapper.

    This link is from Baditude (our resident battery/safety expert): Purple Efest Batteries not as Advertised
     
  16. Asbestos4004

    Asbestos4004 Vaping Master Verified Member ECF Veteran

    Sep 11, 2013
    Sugar Hill, Georgia
    An authentic evolv DNA 30 will not fire below .5 ohms. Build it at about 1-1.5 ohms. Then you can find where you like the performance. I'm running a 1.5 ohm build at 25w. That's 6 volts. Its outstanding. You don't need low ohms for big clouds and big flavor.
     
  17. VaPreis

    VaPreis Ultra Member Verified Member ECF Veteran

    Oct 5, 2013
    St. Louis, MO
    True, perhaps, but a DNA30 will never pull close to 20 amps.

    Sent from my KFSOWI using Tapatalk
     
  18. thegreatappreciator

    thegreatappreciator Senior Member

    Aug 25, 2014
    Fort Payne, AL
    So, I built another coil that is 0.7 ohms, but the Hana will still not push it consistently. I'm using 24 gauge kanthal, and with the 12 wraps I'm putting around a 10 gauge nail it is getting harder and harder to get the coils to fit inside the atty. If I get a heavier gauge kanthal, will that allow me to obtain higher ohms with the same number of wraps?
     
  19. jbnuke

    jbnuke Senior Member Verified Member ECF Veteran

    Oct 27, 2014
    Trenton nj
    When im trying to save battery ill run my ipv2 as low as 2.7volts. Still chucks out clouds... just not as big or as warm. But I dont know much about the dna's
     
  20. jbnuke

    jbnuke Senior Member Verified Member ECF Veteran

    Oct 27, 2014
    Trenton nj
    Yes. Example 9 wraps around a 1/16 drill bit of 28 gage makes a 1.5 ohm coil..
     
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