When I was picking up coils the other day, the guy asked if I'd ever tried a 0.8 ohm coil in one of my Genitanks. I said I didn't think it could read the resistance and he said that the variable wattage settings seem to be able to get it right. My questions is... should I even try? will this screw up my MVP if I try to power up the .8 ohm coil in a tank?
Sub-ohm on an MVP2
- Thread starter dhood
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I don't believe the MVP will fire below 0.9Ω, so it likely won't work at all.
Even if it did, the MVP is limited to 3.5 amps, so low resistance coils don't suit it well.
Even if it did, the MVP is limited to 3.5 amps, so low resistance coils don't suit it well.
I have some .8 kanger coils and they read and fire just fine. The problem is you will have to likely keep the voltage or wattage at the lowest settings or you r juice is gonna scorch and your coils wont likely last long. IMO they are not worth it for the MVP. I prefer 1.2 as the lowest on the mvp myself.
It won't fire at low ohms, but it will read the ohms, so it makes for a nice ohm meter if you don't have one.
I've tried 0.9 and the fire button turns a solid green were nothing happens.
Here's a thread on the MVP:
http://www.e-cigarette-forum.com/fo...0-information-thread-read-if-you-own-one.html
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If you didn't buy the coil, you could do a quick test by running wire through the posts of an RDA until you get to .8, and try hitting the fire button.
If you don't mind a long heat up time. The .8 will be 28 or 26 and the MVP will heat those pretty slowly at 11w. I guess if you like a long 7+ second draw or double pulls...
I would stick with 30g or 32g around 2ohms for a nice producing vape with quick heat up.
Seems a lot of the b&m guys are trying to talk people into sub-ohming. I would just ignore them.
I would stick with 30g or 32g around 2ohms for a nice producing vape with quick heat up.
Seems a lot of the b&m guys are trying to talk people into sub-ohming. I would just ignore them.
So i guess the consensus is that it will probably hit, but you really can't adjust the power on it. i expected this. at it's lowest level, the MVP delivers 3.3 volts to the coil. if i do my math correctly, that means 13.6 watts, but the MVP is spec'd to only do 11.
on the other hand, guess i need to find another thread that explains the differences between loads on similar coils with different resistance (time to fire, battery usage, etc.) thanks all.
on the other hand, guess i need to find another thread that explains the differences between loads on similar coils with different resistance (time to fire, battery usage, etc.) thanks all.
What concerns me is a B&M suggesting this and almost indicating that it's necessary. While I vape regularly at ohms lower than this, it's certainly not necessary. As a matter of fact I'm currently in the process of adjusting and transitioning to higher resistance vaping, as with the higher wattage regulated devices, it's not necessary at all to use lower resistances, and may indeed be safer. I know it certainly saves on battery life and doesn't burn through the juice as quickly, than there's the matter of whether or not vaping at higher temps is safe, amp limits, etc. etc. Not trying to start a debate, I just don't get why if you're happy with your current set up or even worse, just starting out why others think this is a feasible or good suggestion. I had the same thing happen to me first time I walked into a B&M and was still on an Ego/Clearo set up. Idk about the MVP's but I had just about every other Innokin product, the Cool Fire 2, the iTaste, the VTR and you could not sub-ohm on that, but heck, as someone pointed out on another thread, these day's 1-1.8 ohms is considered high resistance! Smh
The guy at the B&M didn't say it was necessary. He just asked if I'd like to try it and tossed me a .8.
Just went through PBusardo's Beginner's Guide to E-Cigs and E-Cig Tech. Very interesting. I had always thought that because I was using a lower setting on my VV stick (with a lower resistance coil) that i was using less power, and therefore enhancing battery life. Looks like, based on ohm's law, that the higher resistance coil might use more voltage but uses less power to fire up. i had always done the math in my head to figure out how to get to around 10W - my sweet spot. I never did the calculations for amperage.
Just went through PBusardo's Beginner's Guide to E-Cigs and E-Cig Tech. Very interesting. I had always thought that because I was using a lower setting on my VV stick (with a lower resistance coil) that i was using less power, and therefore enhancing battery life. Looks like, based on ohm's law, that the higher resistance coil might use more voltage but uses less power to fire up. i had always done the math in my head to figure out how to get to around 10W - my sweet spot. I never did the calculations for amperage.
2.3 ohms is the battery longevity sweet spot - While still producing 10w it has a draw of. 2.17amps at 5v & 10.87w
So 11w @ 2.3 ohm will probably last 40% longer than a .8 at 11w. And heat twice as fast
So 11w @ 2.3 ohm will probably last 40% longer than a .8 at 11w. And heat twice as fast
Yeah, but can you get a 2.3 ohm dual coil for a Kanger Genitank/Aerotank? I only find 1.2, 1.5, and 1.8 coils
Nope you would have to make your own coil. You had mentioned a genni so I assumed it was a rebuildable.
Don't forget that 11w is 11w... It doesn't matter how you generate it... Rather using high current low voltage or high voltage low current... Either way it's still 11w... Meaning battery life will be EXACTLY the same...This confuses people a lot of times because when they calculate it out they see less current... BUT...
The problem is they're thinking like this....
Battery <-> Atty
But in reality it's
Battery <-> Regulator <-> Atty
That regulator is what is exchanging voltage for current... So if you take 4.2 volts from the battery and run 10 amps on it... You'd THINK that if you run 8.4 volts at 5amps to get the same wattage that you'll save lots of battery life... But remember, the regulator itself is outputting that 8.4 volts at 5amps... But it has to be fed by the 4.2v battery... Doubling the voltage means doubling the amps... So it's still drawing 4.2v at 10amps to produce that 8.4v at 5amps...
So in the end the battery life doesn't change... EXCEPT minimally... I only put that caveat in there because depending on the regulator it can be slightly more efficient at certain voltages...
Hey rusirius
I know this isn't the place to discuss this but anyone that has tried it on older 15w type chips has seen the increase I'm talking about. Your thread would be the place.. But it's all DNA40 on it now.
I think if you factor in the voltage drop and amp change when battery is down to 3.7 and you try to push .8 ohms at the max it highly stresses the chipset and your down to 8 watts or lower where as the 2.3 would still be trucking at 10.87w. I guess i mean its nonlinear. This has been my experience with a zmax 15w chip. Voltage drop is the killer and I won't vape it when it drops to 9w from the excess load. So more usable run time at higher ohms. Does that make any sense?
Granted newer chips will be able to perform differently. But we are talking about an MVP2.
I know this isn't the place to discuss this but anyone that has tried it on older 15w type chips has seen the increase I'm talking about. Your thread would be the place.. But it's all DNA40 on it now.
I think if you factor in the voltage drop and amp change when battery is down to 3.7 and you try to push .8 ohms at the max it highly stresses the chipset and your down to 8 watts or lower where as the 2.3 would still be trucking at 10.87w. I guess i mean its nonlinear. This has been my experience with a zmax 15w chip. Voltage drop is the killer and I won't vape it when it drops to 9w from the excess load. So more usable run time at higher ohms. Does that make any sense?
Granted newer chips will be able to perform differently. But we are talking about an MVP2.
Absolutely, other factors such as voltage drop, efficiency of the DC-DC at different outputs, etc will all affect it and potentially boost or decrease battery life. I just didn't want anyone reading the post and thinking that the lower they get the amp draw the better their battery life will be while maintaining the same wattage. A watt hour is a watt hour no matter how you use it so to speak. I truly have no idea the specs on the battery in the MVP2, even though I own one myself. I am fairly sure given it's form factor they probably use a flat lipo. If that's the case, then it's probably a 2S lipo meaning it kicks out over 7v nominal. In that case I'm sure it's only a buck DC-DC. Typically these run at higher efficiency to begin with, but the less voltage they have to buck (meaning the higher the voltage they output) the more efficient they are. So you should definitely see slightly increased battery life with higher resistance coils at the same power level. Just bear in mind that's making a lot of assumptions that I'm honestly not positive about.
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