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Need help with dual coil RBA builds

Discussion in 'New Members Forum' started by sqonker, Jul 28, 2015.

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  1. sqonker

    sqonker Super Member Verified Member ECF Veteran

    Jul 28, 2015
    I have been using used single coils ( 28 guage .07-.08 2.0mm ID) I have tried many times to get into dual coils but just cant get them right - I dont get any increase in vapor or flavor. I like using 22mm atties and I feel like I'm not using the atties to their full potential with a single coil in them. Any one have any suggestions?
     
  2. edyle

    edyle ECF Guru Verified Member ECF Veteran

     
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  3. Cloudmann

    Cloudmann Ultra Member Verified Member ECF Veteran

    Mar 17, 2015
    North Charleston, SC
    Nothing wrong with single coil setups... I actually prefer them and feel I get a better vaping experience overall with one coil.

    To address your concerns, though, you'll need to keep in mind that resistance is key with building your own coils. For example, if you used to use a single 0.5 ohm coil and are trying a dual 1.0 ohm coil setup, your end resistance will still be 0.5ohms and will vape quite similarly... maybe slightly better. That higer total wattage is what you're after. Try building lower with heavier gage wire... that's one of the benefits of multiple coils.
     
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  4. sqonker

    sqonker Super Member Verified Member ECF Veteran

    Jul 28, 2015
    Ok I will try that. What atty do you use mostly? Thank You
     
    • Like Like x 1
  5. Cloudmann

    Cloudmann Ultra Member Verified Member ECF Veteran

    Mar 17, 2015
    North Charleston, SC
    That varies. I use the Derringer, Hobbit, and Goblin Mini all fairly regularly. Lately, I've been getting back into a Genesis RTA groove... awesome flavor, Genesis RTAs...
     
  6. Cloudy_benz

    Cloudy_benz Full Member

    Jul 28, 2015
    NJ
    I've always build duals. Mutation x, mutation x v4, derringer, doge, dark horse, and igo-m. 24g kanthal with 5 wraps each on a 2.4mm (I believe) drill bit. Comes out to .14-.15ohms. Huge vape and great flavor.
     
  7. Trypno

    Trypno Super Member Verified Member ECF Veteran

    Jan 17, 2014
    Colorado Springs, CO
    With dual coils, each coil MUST be identical, otherwise they won't work efficiently. Keep an eye on the number of times you wrap, one of your coils may have one more wrap than the other, and end each coil the same way.

    Say you're using a coil jig where you wrap the wire around a post, if you start under the post, your end lead needs to end ABOVE the post, and the next coil needs to be wrapped identically.

    Try sleeper builds, rip tripper has instructions on doing sleepers on youtube. Anytime I wrap duals, I build a sleeper.
    A sleeper is basically two coils made from the same piece of wire, running through the positive post; if built right, everything heats up more evenly than two separate coils. Separate coils ARE easier, but not as efficient.

    Dual coils are typically built in parallel. What this does is split the resistance in half...as others have said above, if both of my coils are each at 1ohm, then the total resistance becomes .5ohms. If I built a quad coil, where each coil were 1ohm, the total resistance would become .25ohms
     
  8. edyle

    edyle ECF Guru Verified Member ECF Veteran


    What ohm coils have you been using.

    What power source are you using.
    If you are using a mech then once you are happy with one coil, you just add a second coil for twice the vape.
    But if you are using a vw-only mod, when you add the second coil, you'll need to double the wattage
     
  9. Darth Omerta

    Darth Omerta Ultra Member ECF Veteran

    Jun 22, 2015
    My first suggestion is to get the resistance up. If you are running dual coils at .07-.08ohms, you are running in the danger zone for MOST mods and if you are on a mech then definitely danger zone for ALL available batteries. I dont even think thats safe for TC builds(correct me if im wrong because i dont know much about TC builds).

    I'm hoping that was just a typo. For me the best vape comes from about .4-.7 ohms in a dual coil build. That is subjective of course but safety first.
     
    • Like Like x 2
  10. dhood

    dhood Ultra Member Verified Member ECF Veteran

    Sep 30, 2014
    Georgia
    When you need to create two coils that are as similar as possible, I find a coil jig to be indispensable. I can create two coils on a Kuro Coiler that are essentially identical. Makes it a whole lot easier.
     
  11. sqonker

    sqonker Super Member Verified Member ECF Veteran

    Jul 28, 2015
    Thanks for all the suggestions - I will try them all. I am currently using a mech - a LP Reo Grand with an ODIN atomizer. I typed the initial post wrong - i build my single coil at.7 or .8 and I use Sony vct5 batteries. I notice it takes a lot longer for both coils to heat up. I have been wrapping on a drill bit so i may try one of the coilmaster things or a jig. Ill work on it and let you know how it goes. Thanks to everyone who replied.
     
  12. Darth Omerta

    Darth Omerta Ultra Member ECF Veteran

    Jun 22, 2015
    Have you tried the VTC4s? Nothing wrong with the VTC5 but its a 20A battery that gets hot quick when it pushes between 15-20A. The VTC4 is a great 20A cell that can push 30A safely, but also gets hot very quick when above 20A. If you plan on building lower resistance than a .7 then the VTC5 can probably handle the load but you might get better results out of a VTC4 in the .5-.7 range.
     
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  13. sqonker

    sqonker Super Member Verified Member ECF Veteran

    Jul 28, 2015
    No I havent tried those - I was hearing that the vct5s were the best so i got those. Ill get the vct4s and try them. Thank You
     
  14. Darth Omerta

    Darth Omerta Ultra Member ECF Veteran

    Jun 22, 2015
    • Like Like x 3
  15. suprtrkr

    suprtrkr ECF Guru Verified Member ECF Veteran

    +1 on the VTC4s on mech builds below about .7 total ohms.
     
    • Like Like x 1
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