MVP Owners Group-into the next generation

[Frenchfry1942]

I have been gone from e-cig forum for about 6 months it seems to have changed a bit. I am an MVP V2 owner and I can't find a "create new post" button. Do I have to pay everyone $10 in dues or something?

Anyway, my question. I just picked up a kayfun 3.1 clone to start rebuilding. Previously, I was using PT2s and just using disposable 2.2-2.5 coils. Anyway, the MVP2 only has a power (Watts) range of 6.0 to 11.0 and I hear everyone is doing less than 2 ohms of resistance. I was using 2.2 resistance and 6-7 watts so as not to burn the liquid. Do I have to build coils with ohm ratings that my MVP2 can handle (above 2.0)?

If so, how do I determine the wire gauge, coil diameter, and the number of turns?

Respectfully,

 

[PaulBHC]

Resistance is a diameter of wire in a length. The smaller diameter (higher gauge number), the more it resists. You can't lay a 2 inch piece of wire on your coil housing so we wind it into a coil to make it fit.

 

[diceman1000]

I have been gone from e-cig forum for about 6 months it seems to have changed a bit. I am an MVP V2 owner and I can't find a "create new post" button. Do I have to pay everyone $10 in dues or something?

Anyway, my question. I just picked up a Kayfun 3.1 clone to start rebuilding. Previously, I was using PT2s and just using disposable 2.2-2.5 coils. Anyway, the MVP2 only has a power (Watts) range of 6.0 to 11.0 and I hear everyone is doing less than 2 ohms of resistance. I was using 2.2 resistance and 6-7 watts so as not to burn the liquid. Do I have to build coils with ohm ratings that my MVP2 can handle (above 2.0)?

If so, how do I determine the wire gauge, coil diameter, and the number of turns?

Respectfully,

In wattage mode, the MVP will adjust automatically for whatever resistance Atty you use as long as it's within the working range. Likewise, in voltage mode, it will automatically adjust zbd will never exceed the max voltage or wattage.

 

[Frenchfry1942]

Diceman, Paul,
Okay, I see vendors selling 26 gauge (and above) and it is at 3.21ohms. That is still a lot of resistance. Whether volts or watts, it doesn't seem to be in the working range of the MVP's abilities. Do I need to look for 24 gauge? Also, what drill bit do I use? Is their a difference in the size of the turns?

 

[PaulBHC]

You may be seeing ohms per foot. You are only going to end up with 2 or so inches.

This calculator will show you the results from different numbers

Steam Engine | free vaping calculators

Play with the numbers to see how it changes. Leg length is the only thing that gets iffy, hard to measure.

 

[PaulBHC]

For example

I start the calculator page and change to imperial. Select kanthal A1, round, 30ga, single coil, 1.8Ω

Then I click the x/y" button for inner diameter and leg length and select 5/64" for diameter and 1/4" for length.

That shows me that the total length of straight wire is 2.489 inches and will have 8 over 7 under wraps.

This will not be totally accurate because the looser you wind the wire, the more length ends up in your coil.

 

[diceman1000]

oval coil build on old style BDC heads...

Kanger Aerotank Coil Rebuild - YouTube

that's just the oval coil build, there are several others too for micro coils, plain old singles, etc...

https://www.youtube.com/results?search_query=aerotank+coil+rebuild

 

[Frenchfry1942]

Okay, I had to go up in gauge to 28 and a target resistance of 2.8. I figure that 2.8 will be about centered within the working window.

For results, I got

Resistance wire length 6.16 in
Number of wraps 24.77
— rounded to "full wraps" 25
— rounded to "half wraps" 25/24
Leg power loss 3.2%

This seems like a lot of wire length and wrapping...Am going to YouTube...

 

[diceman1000]

Okay, I had to go up in gauge to 28 and a target resistance of 2.8. I figure that 2.8 will be about centered within the working window.

For results, I got

Resistance wire length 6.16 in
Number of wraps 24.77
— rounded to "full wraps" 25
— rounded to "half wraps" 25/24
Leg power loss 3.2%

This seems like a lot of wire length and wrapping...

28ga kanthal is what i use for all of my rebuilds...

 

[PaulBHC]

I use 32ga in clearos like kanger PT heads on 1/16" drill and 30ga for RDA/RBA with a 5/64" drill.

That 30ga 5/64 with 6 wraps ends up around 1.5-1.7 and 7 wraps around 2.

Sounds like you did something wrong.

26 or 28 gauge will give low ohms, takes longer to heat up and cool down, so you need more power and air flow. More wraps gives more surface area.

IMO 30ga is a good compromise for a 1.8-2.2 coil run at 8-10 watts with good airflow.

 

[diceman1000]

A 20ga syringe needle or equivalent with 11 wraps of 28ga will yield .9ohms or there abouts.

 

[PaulBHC]

I don't have a kayfun but I don't think you are going to want to run over 2 ohms in it.

 

[garyoa1]

Ya know, after playing with this stuff and watching/reading all the forums for nearly a year... I'm not getting it. Everyone and their brother wants to go lower and lower.
Personally, the lower I go, the less I like it. I get more flavor, more clouds and juice lasts longer when I'm over 2 Ω

As far as the i30, I have some 2.1 coils and some 1.5 coils. Both actual innokin replacements. The 1.5 are in the back of the drawer for an emergency back up.

 

[Frenchfry1942]

Well, I have HCigar (Kayfun 3.1) clones in the mail. I do have a meter, but not the experience.

I am currently getting tools and trying to order it right the first time. I think I am ready to experiment. I will just get extra wire and organic cotton.

Much appreciating guys,
Jere

 

[Wow1420]

I don't have a kayfun but I don't think you are going to want to run over 2 ohms in it.

Agree, I have a Kayfun at 1.6 ohms on my MVP right now. I'm running it at 9 watts. Works great.

Just got the yellow LED after 675 puffs. I may have been running it a little higher (9.5 or 10) the day it went yellow at 600.

 

[Midniteoyl]

Well, I have HCigar (Kayfun 3.1) clones in the mail. I do have a meter, but not the experience.

I am currently getting tools and trying to order it right the first time. I think I am ready to experiment. I will just get extra wire and organic cotton.

Much appreciating guys,
Jere

30ga Kanthal, wrapped around a toothpick (~2mm) 8x will give you 2ohms, which is perfect for a MVP2 as its the most accurate @ 2ohms.

28ga Kanthal wrapped around a toothpick 13x will also result in 2ohms.

As Paul said, 30ga seems to be the optimal gauge for the MVP2 and is what I try to use.

 

[Midniteoyl]

Gotta like the compression that makes pic uploads worthless...

 

[PaulBHC]

Oh it's not just my old eyes? lol

 

[PaulBHC]

Ya know, after playing with this stuff and watching/reading all the forums for nearly a year... I'm not getting it. Everyone and their brother wants to go lower and lower.
Personally, the lower I go, the less I like it. I get more flavor, more clouds and juice lasts longer when I'm over 2 Ω

As far as the i30, I have some 2.1 coils and some 1.5 coils. Both actual innokin replacements. The 1.5 are in the back of the drawer for an emergency back up.

i30 and most clearos don't have the airflow to take advantage of lower ohms.

Bigger wire is more surface area to vaporize liquid. That is lower ohms and needs more power to heat quickly. That needs more air flow to keep it from overheating. Then it needs more liquid. Then we might as well multicoil. Now we have vapor and no flavor so we need a smalleer chamber to concentrate...

 

[garyoa1]

I hear ya, Paul but my point is most folks here may be going in the wrong direction. I don't meant by seeking lower, I mean by seeking flavor they're throwing away flavor.

I did try a few kf's and the rest and to me... marginal. Thing is I DID find an ADV early on. Actually a few. And they work best at 2.1 with a clearo. I have no need to seek better flavor or clouds. I found it and I have it. Am I lucky? Most likely.

BUT, those who are reading these forums and listening and wanting to use this or that and do this or that... well, it's just possible they haven't stumblied across the right juice for their palette yet!

Most who start to vape do it because they want to quit smoking. Likely finding the juices they tried... marginal compared to smokes. I was the opposite. Never wanted to quit. Just found some amazing flavors that hit the spot. So I have no need to try to improve perfection, so to speak.

I'm not saying don't experiment. Just saying that it may be fun to do but if it's for improvement on what you already experience it may be an effort in futility. Or not.