eVic-VT mini?

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Rsunderl

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What about the evic vtc mini 20A cutoff? If the device has a 20 amp limit what's the point in having a 25A or 30A battery?

Any word on this? It's an Evic vtc mini thread...surely someone knows for a fact if the device has an amp limit and if that negates the point of having a larger battery rating than that? :)
The point is safety. Pushing a battery to its limit constantly is never a good idea. It's better and safer to leave some headroom.

Also, as batteries age, their Amp limit decreases. So, if you are drawing 20 Amps from a new 20 Amp battery, sometime down the road, you will be drawing 20 Amps from that same battery, but it wlii no longer be a 20 Amp battery - perhaps something like an 18 Amp battery.

@Mooch is one of our battery experts here, and can explain it much better than I can. you might want to read some of his blogs.

Hope it helps and Happy Vaping!
 

cvigti

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The point is safety. Pushing a battery to its limit constantly is never a good idea. It's better and safer to leave some headroom.

Also, as batteries age, their Amp limit decreases. So, if you are drawing 20 Amps from a new 20 Amp battery, sometime down the road, you will be drawing 20 Amps from that same battery, but it wlii no longer be a 20 Amp battery - perhaps something like an 18 Amp battery.

@Mooch is one of our battery experts here, and can explain it much better than I can. you might want to read some of his blogs.

Hope it helps and Happy Vaping!
Thanks :) I actually went to Mooch's blog and even asked him at the time (what battery would be suited for an evic vtc mini).
Anyway, I settled on a lower amperage battery. A Type A. LG MJ1 18650 to be exact. I figured I would only be generally vaping at 11w a 1.6ohm coil. If needed, to experiment TC for example, I just stay at 30w. If, at a later date, I go for TC all the way (not seeing that happening but still...) I will get some LG HG2's. In 4 years of vaping I always disliked big clouds and sub-ohms (and direct lung hits), and I think TC is close to that experience so I will probably stick to my 1.6 kanthal coils ;) As a plus I get more battery time and less juice consumption. :D
 

Quantum Mech

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Has anyone tested with known "pure" 316l?

yeah I am running dual 24awg ss316 [from crazy wire/vape mesh] @ 0.16ohm

vapes just as it should using the ss profile at 420f

been on this same build for over two weeks with one rewick

doubt I will be changing it for some time yet
 

Pete54

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yeah I am running dual 24awg ss316 [from crazy wire/vape mesh] @ 0.16ohm

vapes just as it should using the ss profile at 420f

been on this same build for over two weeks with one rewick

doubt I will be changing it for some time yet
How does that set up vape using the "accepted" TCR of 0092 on the Mini?
 

Sptz

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May also have to do with resistance/connectivity issues in your particular Evic VTC. I've read about issues like this in the rx200 reminiscent of the evic vtc and when the 510 was replaced with a VT 510 the problems disappeared. I'm not sure that swapout is possible with the VTC but at least you can now compensate for the anemic vape issue by adjusting the manual TCR setting and effectively eliminate the issue.

The connection on mine seems to be pretty solid, there's no weird fluctuations. It reads the same resistance on this coil for 3 days now. I did wish it was true spring loaded with a strong spring like a vt510 or
How does that set up vape using the "accepted" TCR of 0092 on the Mini?

curious as well
 

Mactavish

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I only use Ti but if I vape it in Ti mode I get a much warmer vape then if I vape it at TCR366 which is the TCR for Ti01 so the TCR they have set in Ti mode is definately higher then the actual TCR for Ti01 but it still vapes well at 366.

Odd, I have experimented with this and found the complete opposite of what you have posted.
 

Pete54

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just tried it back and forth between the ss preset and tcr 0092

seems to be identical
Then that would lend credence to the idea that the SS used by Joyetech is "different" than 316 because the same can not be said when using their pre-built SS Cubis coils.
 

Kandem

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just tried it back and forth between the ss preset and tcr 0092

seems to be identical
If you find that they are the same and you want more vape and flavour, bump up your TCR setting a bit. I'm running the crown ss316 coil at 0100TCR rather than 0092 and it is wonderful. Much better than ss316 mode.
 

VapingTurtle

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If you find that they are the same and you want more vape and flavour, bump up your TCR setting a bit. I'm running the crown ss316 coil at 0100TCR rather than 0092 and it is wonderful. Much better than ss316 mode.
Can you tell me how that would be different than increasing the temperature setting a little bit?
 
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Kandem

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Can you tell me how that would be different than increasing the temperature setting a little bit?
I do not know all the science in it, but I used 0092 at 540 F with 75W for the power. I increased the TCR to 0095 then 0097 and finally to 0100 and found that this was where I had the best flavour and vape production. Increasing the temp made the vape warmer than I preferred.
 

Jalcide

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Can you tell me how that would be different than increasing the temperature setting a little bit?

Not much difference, except maybe more flavor production. Those two TCRs equate to 30 degrees F (for an average .5 ohm build) over a typical temp range (a .1 ohm change in resistance on SS).

So, increasing the temp setting by 30F on the 0092 would reach the same target temp as 0100 (the math of it, can't speak to real measurements).

There should also be small differences in the ramp up characteristics and how it maintains the temp (smoothness), as the reality of the wire's true TCR battle how it's being slightly, inaccurately calculated (at the sample rate of the mod; hundreds of times a second).

But Joyetech chips seem to really smooth these micro changes and deal with them in a vape-friendly manner. Net effect: not much difference, except the side effects, due to the inaccuracy of a TCR that's higher than actual, creating "micro sputtering" injected into the vape as the temp rises above "where it should" then being cut off, rinse repeat (hundreds of times a second). This can create a flavor effect. Some like it, some don't. (Personally, I like a cool, buttery smooth vape, so I don't like it.)

For grins and giggles, here's the math of it:

TCR formula:
(Rref + rD) = Rref [1 + a(T - Tref)]

R = resistance at temp T
Rref = resistance at temp Tref
a = TCR
T = temp
Tref = ref temp for the TCR
rD = resistance delta (rise or fall)

0092:
(.5 + .1) = .5[1 + .00092(T - 20)]
A .1-ohm rise or fall: 237C (458F)

0100:
(.5 + .1) = .5[1 + .00100(T - 20)]
A .1-ohm rise or fall: 220C (428F)

458F - 428F = 30F difference between the two TCRs.
 
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Quantum Mech

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If you find that they are the same and you want more vape and flavour, bump up your TCR setting a bit. I'm running the crown ss316 coil at 0100TCR rather than 0092 and it is wonderful. Much better than ss316 mode.

Nope & Nope

I leave tcr as it should be if it requires a temp increase then it would get one

Had to pull the battery 3 times today to get it to stay in SS mode ..... dung

This is on the same build that's been fine for over 2 weeks

W T F are they playing at, TC is for advanced vapers who should control and know when to put it in wattage mode

Will stick with my SX Mini's for now on
 

Quantum Mech

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Yeah, this trying to be too clever about auto-detect always fails. It should just stay where the user set it.

So, you're saying changing the TCR to something higher is bumping you out of TC?

No mate I have been running a dual SS316 build fine for weeks

Today it just kept jumping into wattage mode as soon as I fired it

Set it back to SS mode, barely touch the fire button and back into wattage mode

Only way to stop it doing so for a while was pull the battery
 

Pete54

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No mate I have been running a dual SS316 build fine for weeks

Today it just kept jumping into wattage mode as soon as I fired it

Set it back to SS mode, barely touch the fire button and back into wattage mode

Only way to stop it doing so for a while was pull the battery
I had that happen to me for the first time last night but with TCR mode. After three failed attempts to switch it back to TCR, I changed it to Ti, fired it for a second, switched it to TCR and it hasn't gone back into power mode since. Go figure. On a side note, I tried a TCR of 0140 using the SS 0.5Ω Cubis coil and it works great. At 0092, nothing.
 
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