Which is best? I was gonna go with the vivi but im hearing about others that may be better like bottom feeders? I want a nice cool hit like I get from Blu Menthol disposables. Thanks
dave
I know that this is a slightly older thread but I'm posting in hopes that this may help someone else with the same problems I've had.
I've been struggling with this same question so I ordered an EVOD (also have a protank 2 on the way) so, FWIW, here is what I've found.
Vivi Nova tanks are awesome. I have three large tanks and three mini tanks. Over the last few months the mini has become my favorite as the taste of my e-liquid really shines in the mini where it seems somewhat muted in my larger tanks. I use the factory 1.8-Ohm heads (they all measure at ~1.9-2.0 Ohms though) on an ego-style battery running at 3.7-3.8V. In this setup I have found no other combination of tank (cartomizer, clearomizer, or other tank) that provides the easy, flavorful hits that the mini Nova tank does. However, the Nova tanks for their own drawbacks - tank threading can be finicky and can sometimes leak if you're not careful and you constantly have to tilt and swirl to make sure the wick is saturated. Also, even with the thread cover/adapter the 510 connection seems somewhat fragile and can easily be bent due in a pocket or dropping your PV resulting in poor performance and leaking.
I really wanted to like the EVOD. The ego threading makes it really solid and I really don't have any issues with gurgling or leaking. However, the factory 1.8-Ohm heads, while producing lots and lots of vapor, really does mute the flavor of my e-juice - so much that rebuilding the atomizer was the last thing to try before ditching the EVOD altogether. The rebuild is easy, in theory, but it took me a number of tries before I really got it vaping the way I wanted it to. My current build is a 3mm silica wick with 32 AWG Kanthal wire. 5 semi-tight coils (to make sure all coils are in contact with the wick but not tight enough to impede wicking) yields a ~1.7-1.8 Ohm coil that is just outstanding. The only thing that would make it perfect is if it would accept my standard drip tips.
At 3.7V, the flavor is just a tad less than that of my mini Nova tank. This is an acceptable trade off considering the connection is much more rugged, the throat hit is outstanding (don't even need the few drops of Menthol I was using for that purpose), and it uses less juice than my Vivi Nova. Also, since I use Vision Spinners and an Innokin itaste, I can just turn the voltage up slightly to 3.8 and 3.9V and instantly out-perform the Nova tank in all categories. I generally don't go over 4.2V at all.
I'm looking forward to using these coils in my ProTank 2 (and later, maybe, a Protank 2 mini)!
Overall, these are both great-performing tanks which will stay in my rotation for a good long while - each for specific purposes. The mini Viva Nova, in my eyes, is the hands down winner out-of-the-box. However, the Kanger EVOD outperforms it in all aspects once you do a successful, custom rebuild of the coil/wick assembly.
NOTE: I currently only uses 70/30 PG/VG e-liquid for vaping. I have not tested it with my other e-liquids yet but I do have 50/50 juices that I haven't used for a long time that might just work for me now.