jasonculp Posted April 17, 2015 Share Posted April 17, 2015 I have been thinking about the numbers when I rebuild coils. I am hoping that someone can clear this up for me: If I build 2 coils, and run them in the same tank, on the same mod, but with different ohm values, which is better? By better, I am asking vapor producion, flavor, and economy. 1.5 ohm coil, 30 watts is 6.7 volts and 4.7 amps. .5 ohm coil, 30 watts is 3.9 volts and 7.7 amps. Both are totally different coils, but at the same wattage. Which is better? If the wire is the same, say 26 gauge and diameter is 2.5 mm: 1.5 would take 12 wraps .5 would take 4 wraps I know this isn't really practical, but wouldn't they vape totally different at the same wattage? I am sure the lack of sleep and total brain drain I have had for the last few weeks is making this too confusing, and somthing I shouldn't even worry about. A good example of this is the SubTank Mini. If you run the .5 coil at 30 watts and the 1.2 coil at 30 watts does it really make much of a difference? Link to comment Share on other sites More sharing options...
Earthling789 Posted April 17, 2015 Share Posted April 17, 2015 Very different, at the same wattage... because the lower resistance coil will heat faster and be "hotter". It will also cool down faster, which makes it more desirable for chain-vaping or a quick-hit. The higher resistance coil will take longer to heat, run "cooler", take longer to cool down... which will add heat to your juices, turning them darker in a tank, but should have far less effect to juice in an RDA. But, it may make the RDA body warm (even with cooling fins) Link to comment Share on other sites More sharing options...
Tam Posted April 17, 2015 Share Posted April 17, 2015 What are cooling fins? Link to comment Share on other sites More sharing options...
Earthling789 Posted April 17, 2015 Share Posted April 17, 2015 (edited) Those ribs / rings around the top of an RDA... sometimes also at the bottom. They help to disperse heat by increasing the surface area. Edited April 17, 2015 by Earthling789 Link to comment Share on other sites More sharing options...
Compenstine Posted April 17, 2015 Share Posted April 17, 2015 Works as a heat-sink Tam. Link to comment Share on other sites More sharing options...
Tug Posted April 17, 2015 Share Posted April 17, 2015 Like a motorcycle engine! Link to comment Share on other sites More sharing options...
HOOKER Posted April 17, 2015 Share Posted April 17, 2015 or a fintube Link to comment Share on other sites More sharing options...
Bebop Posted April 17, 2015 Share Posted April 17, 2015 Doesn't it follow with twice the surface area, twice the barrel, and equal wattage that the 12 wrap coil will go thru juice faster? Link to comment Share on other sites More sharing options...
Tam Posted April 17, 2015 Share Posted April 17, 2015 Thanks, guys! Link to comment Share on other sites More sharing options...
jasonculp Posted April 18, 2015 Author Share Posted April 18, 2015 I guess I need to build a bunch of different coils this weekend and see what comes out of it. On the SubTank Mini, it lends itself well to use smaller wire as the coil is suspended between the posts. The Lemo needs larger wire as it holds the coil up away from the deck. I like building with the larger wire, because it is just easier to me, but it is causing me to go much lower ohm than I really like. Link to comment Share on other sites More sharing options...
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