So, I bought the gripper, and loved using the VV to get the best vapor based on the carto and juices. Found I usually hung out around 4.2, though possibly a bit lower (3.8 or so), on lower ohm cartos. Then I get a Vivi Nova kit. Tried on both the 2.4 and 2.8 ohm heads, and I can't vape over 3.3 volts without burning it. This doesn't make much sense to me. While it still produces good flavor and vapor, seems a bit odd that it is so drastically different than the cartos. Makes me think I could vape this on my old egos, no need for the VV....
Vivi Nova and VV vaping
- Thread starter GIMike
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I was thinking of picking up a nova to try, but that does seem a bit low.
I would try cleaning/drying the heads as your case was the same for me with the T2 until I cleaned them.
Check the seal and make sure it's not restricting the wicks. Maybe give it a little lift before installing the top.
Another thing could also be the PWM of the gripper. It seems PWM hits harder than the listed volts showing.
Let us know what you find GIMIKE
I would try cleaning/drying the heads as your case was the same for me with the T2 until I cleaned them.
Check the seal and make sure it's not restricting the wicks. Maybe give it a little lift before installing the top.
Another thing could also be the PWM of the gripper. It seems PWM hits harder than the listed volts showing.
Let us know what you find GIMIKE
What ohms is the Gripper showing for the coils? (I love the built in ohm meter) The VN coils seem to vary from what's etched in the steel. I've been using my Vivi on my Gripper and find that ~2.5 - 2.8 ohms work well at about 3.9-4.2 volts....YMMV
You need to clean them (I rinse & dry burn) straight out of the box or they're extremely inconsistent and sometimes burney until they break in
which takes a couple tanks worth of juice. At least, that's how the first 2 were. I didn't bother wasting juice trying the other 3 before I cleaned them.
As for voltage, I rarely use my 1.8 ohm heads below 4.2V (indicated on a twist) and max it out (4.8V indicated) by the end of the day (with a fresh batt just want more throat hit at night for some reason). Some people say that they take less voltage than a carto, but I think that's probably just a temperature and top vs. bottom coil issue at this point. Also, the ones I metered were spot on, and all of them seem to perform about the same, though because they're using different juices, I can't really be sure of that.
Thanks to that inconsistent start, I almost threw away the first one. If those boxes of cartos had arrived a day sooner, I would have. Fortunately, I cleaned it and re-filled before they did because I greatly prefer them to the cartos I was using before.
As for voltage, I rarely use my 1.8 ohm heads below 4.2V (indicated on a twist) and max it out (4.8V indicated) by the end of the day (with a fresh batt just want more throat hit at night for some reason). Some people say that they take less voltage than a carto, but I think that's probably just a temperature and top vs. bottom coil issue at this point. Also, the ones I metered were spot on, and all of them seem to perform about the same, though because they're using different juices, I can't really be sure of that.
Thanks to that inconsistent start, I almost threw away the first one. If those boxes of cartos had arrived a day sooner, I would have. Fortunately, I cleaned it and re-filled before they did because I greatly prefer them to the cartos I was using before.
I don't think it has anything to do with cleaning, as it seems to work ok on my ego knockoff, but not on the gripper. I've run probably 8 tanks through it now and it's still working great on my ego. Haven't tried it again on the gripper since, so it's just been sitting on my desk at home.
It sounds like it's not wicking.
If your are comparing a 2.4 Ω nova head to a 2.4 Ω carto using the same battery device, then I would say it's a wicking issue.
What voltage are your ego knock-offs putting out? Probably in the 3.3-4.2v range.
Knowing that the gripper uses a strong PWM signal, 3.3v on the gripper is probably egual to 4.2v when you convert the output to RMS.
In that one discussion thread, they talk about PWM devices output and convert it to RMS. When they do this, it seems like these devices actual range is around 4.5-6v and not the volts showing on the display.
I owned one of these types of devices (vmax) and I sold it to a guy at work after the 4th day, it was a coil popper for sure.
If your are comparing a 2.4 Ω nova head to a 2.4 Ω carto using the same battery device, then I would say it's a wicking issue.
What voltage are your ego knock-offs putting out? Probably in the 3.3-4.2v range.
Knowing that the gripper uses a strong PWM signal, 3.3v on the gripper is probably egual to 4.2v when you convert the output to RMS.
In that one discussion thread, they talk about PWM devices output and convert it to RMS. When they do this, it seems like these devices actual range is around 4.5-6v and not the volts showing on the display.
I owned one of these types of devices (vmax) and I sold it to a guy at work after the 4th day, it was a coil popper for sure.
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Hmm, same problem I've been trying to figure out for weeks now...except mine stop working even on consumer-grade batts (eGo, etc.) after a few hits: I get the nasty burnt-taste. It seems to be a combination of poor wicking and subpar design of the coil. In the tanks subforum, there is a lot of info on this...A LOT of info. My thoughts...consider modding the wicks, the coils, or maybe try some different juice. For me personally, I'll never buy one of the same version again- possibly not even the v3 when or if it arrives. I like to use things out-of-the box, if they're indeed meant to be used as such.
So……I saw a picture that someone posted on r/ecr in a tutorial on rebuilding them. Apparently the stock coils use resistance and NR wire that are soldered together……but the NR wire doesn't start right at the coil.
If that's the case, manufacturing tolerances might be big enough that some people get stronger/weaker vapes than others (based on how much of the coil is actually touching the wick) and might explain why some people say they taste like burning: the resistance wire gets close enough to the rubber grommet thing to cause it to melt/burn. And damage to that grommet might also cause some of the shorting stories people have shared (grimmgreen comes to mind).
The 6 heads I've used (on 5 vivi novas) have all performed well so far, but that could just be luck of the draw.
I'm not saying the sky is falling, but it seems like it might be time to start looking at this manufacturing technique as a problem: it seems to explain most if not all of the problems people are having with the vivi nova and how inconsistently they show up.
If that's the case, manufacturing tolerances might be big enough that some people get stronger/weaker vapes than others (based on how much of the coil is actually touching the wick) and might explain why some people say they taste like burning: the resistance wire gets close enough to the rubber grommet thing to cause it to melt/burn. And damage to that grommet might also cause some of the shorting stories people have shared (grimmgreen comes to mind).
The 6 heads I've used (on 5 vivi novas) have all performed well so far, but that could just be luck of the draw.
I'm not saying the sky is falling, but it seems like it might be time to start looking at this manufacturing technique as a problem: it seems to explain most if not all of the problems people are having with the vivi nova and how inconsistently they show up.
I wonder if it's that it's inconsistenancy or the varying range of different devices people use? I've used 2 of the 3 heads (the 2.4 and the 2.8, I didn't use the lowest resistance as you don't really wanna go too LR on VV devices), and couldn't get anything that didn't taste burnt above 3.0v, as low as my gripper will go. 3.0 was pretty questionable too. I tried it on my ego knockoff VV battery and it worked fine on that. When I got my new juices in though, I reloaded my carto tanks and went back to vaping them again. Sorry, but to me and the 2 devices I own that I've used it on, the Vivi doesn't beat carto tanks on VV devices. *shrug*
They do seem pretty sensitive to voltage. It's possible that bad PWM (high Vpp, low duty cycle) will just hit them wrong. But, then again, they all work well on my Twists, and it's not like their output is all that clean……it's just not as bad as some of the PWM mods.
I have been using the mini vivis for a couple of weeks on my twist. Using the 2.8 head, it performs really well around just under or at 4v. Howevee, they do seem to be juice whores. Seems like I am filling them constantly. But they have been working great otherwise.
I think it might just be the gripper. I'll have to wait until I get the twist I just ordered to be sure. Too many issues with the gripper.
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