Ego-C Twist w/1.7 ohm Cartomizers?

[SoulFool]

I'm considering ordering an ego-c twist battery since my 2 standard ego-c batteries are approaching 8 months old. Before I order I have a question:
I currently have two ego-c batteries that I love. They last all day and work great with my favorite cartomizers, which are the Smoktech 1.7 Shorty Cartomizers:
Smoktech "shorty" 1.7ohm Cartomizers

(...I know, these are odd little cartomizers but I don't mind topping them off after nearly every vape session. They perform really well and, although I'm not experienced with dripping, they actually seem like they a mix between dripping and using a cartomizer. With these being so short any new juice dropped in only takes one or two puffs to get to the new flavor. Plus they last roughly 4-5 days.)

Back to my main question though:
if I'm satisfied with my ego-c battery w/1.7 ohm cartomizers, will dialing to a higher voltage on an ego-c twist be too much? I'd rather just stick with ordering another ego-c battery if it's not recommended I go beyond the standard 3.7 with my cartomizers on an ego twist.
On the other hand, if you guys think 1.7 cartomizers are even better at 4v+ than I may just order the Twist.

Thanks in advance.

 

[KForrester86]

your pushing reallllllll close to the amp limit of the twist at 1.7ohms once you hit 4.2v. If I read correctly the Twist has a 2.5amp limit.

but 1.7Ohms at 4.2v is a 10watt vape pretty strong imo, and produces 2.4amps. I'm vaping the 1.8ohm head on the ViviNova 2.5 right now around 4v on my Twist, about a 8.88watt vape. Satisfying, but I feel If I go any higher things are off and risk burning up the coil. The Twist is nice but If your satisfied where your at then I'd stick to that.

 

[daniele25]

I was just wondering a very similar thing...as I just ordered 15 of the SmokeTech 1.7ohm cartos. I got a ton of great info on this thread: http://www.e-cigarette-forum.com/fo...uestions-have-i-been-confused-whole-time.html

In addition, I've been using them for the past few hours, and everything said in that thread is true. They are performing really well on my regular Ego, and at 3.6v on the Twist. I don't have the shorty's, but these are definitely the best cartos I have used to date (especially now that I got my ohms/volts/etc straight!)

Hope this helps!

 

[billo]

I just copied my comments from the previous post here:

I use 1.8 ohm atty's on my Twist and run it around 4.4 volts. That's about 10.7watts, unless the Twist is limiting the current. Anything less is not as good for me.
For example, a fully-charged ordinary battery at 4.1 V is not as good.

So, there are siome rules of thumb, but everyone has to try for themselves. LR atty's definitely work with the Twist !

Edit: If I crank the Twist up to 4.8 volts it seems like too much. So I know I can find the best setting for me. However, if I used, say, a 2.5 ohm atty I might have to crank it to 4.8 volts for the best. So I would not be sure if higher voltage would be even better. Another reason to use a moderately low resistance atty.

 

[spaceballsrules]

I have been using Kanger 1.8 ohm cartos on my Twist for a few weeks now. No problems at all.

 

[KForrester86]

Ego-C-Twist Full Review - YouTube

move along to about 2:20 in the video. shows how it holds it's load on a meter with diff ohms

 

[mostapha]

I use 1.7 Smoktechs on my Twist all the time……been through……idk……15 of them. Maybe 20. No problems.

And the adjustment should stop making a difference above 4.25 V (= 2.5A * 1.8Ohm) but that doesn't seem to be quite the case. There are a couple possible reasons for that.

A) the voltage drop under load happens before the current limit.

B) the current limit happens "faster" than the wave the Twist is putting out cycles, which would have the effect of compressing the top side of the wave and still giving a higher RMS voltage than a lower setting.

It seems like a combination of the two is happening, but I haven't actually plugged it into an oscilloscope, and none of the youtube reviews go quite into that much detail.

In short…it works. Ideally, you should aim a bit closer to 2.0 Ohms to get the full range, I think, but they work great.

The best thing you can do is get used to Ohm's law. It's just 2 equations to memorize and basic algebra. And it is an approximation (because of the voltage drop under load and the fact that basically no variable voltage devices actually output pure DC).

E = I * R
P = I * E

E = volts
I = current (in Amps)
R = resistance (in Ohms)
P = Power (in watts).

Just plug things in and figure stuff out for yourself.

Based on my preferences, I start tasting things around 8 W; my sweet spot is 9-10 W, and above 11 W things start to taste burnt……if the values on the dial on my Twist are at all to be believed. But apparently I like pretty warm vapor, and I prefer to err on the high side.

 

[billo]

Mostapha--

Yes, I see an increase in vapor at 4.8 vs. 4.4 V with a 1.8 ohm atty. This shouldn't
happen with a strict 2.5 A current limit.

Of course what causes heating is RMS volts, not DC volts, and RMS can be much higher than DC, and is never lower. If there is a pulsing component to the voltage, rather than pure DC, the RMS will always be higher than DC. Hence, more heating than expected.

The reviewers always seem to measure DC volts (because that is what their meter reads.) This can be misleading. Perhaps VERY misleading.

Unfortunately, RMS voltmeters are expensive and not readily available. One normally needs to use a scope and do a calculation if the voltage is not pure DC.

Edit: If there IS a strict 2.5 AMP current limit AND the voltage is pure dc, the atomizer which draws the most power and gives the most vapor can be calculated to be:

4.8V/2.5a = 1.92 ohms.

Any resistance lower or higher would give less maximum wattage.

 

[mostapha]

Yep.

And to add to the confusion, a lot of people make the mistake of using Vav as opposed to Vrms on PWM devices (which the twist is not), which gives values that are completely wrong.

I think steeljan's video showed around 2.61A max actual output for the twist. Between that and everything thinking it's limited to 2.5A, I think that means that something trips at 2.5 A but that what actually comes out of it ends up a tiny bit higher……which could just happen depending on where they're measuring for the limit and exactly how their boosting circuitry works.

The conclusion I came to is to just not worry about it too much, use LR stuff, and if there's more detail given, aim for 2.0 Ohms. My 1.8Ohm nova head works a lot better than the 2.4 ohm head. And I don't consider SR stuff usable. I also don't consider dual coils usable, but that's a whole other issue. And if I burn out an atomizer with it, I'll just not put any more of them on the Twist.

Fortunately, it's got short circuit protection and a current limit (might be a bit low but…meh), so it doesn't seem like just trying things is a bad idea.

Also, coincidentally, those values give a max power output of 12W, which I think is enough to run anything but dual coils as long as you're close enough to 2 Ohms.

 

[chemsoldier83]

Been rockin dct tanks with 1.7 ohm cartos at 4 volts. Haven't had an issue.