I bought a woodvil on the classifieds last night. I have zero knowledge when it comes to reos or anything mechanical but someone else told me the woodvil is not a true mechanical and I would need to watch what ohms to build my coils. Anyone have any insight? I clearly don't want to build a coil that will burn it up but I can't find anything on the reosmods website about what to do etc. Thanks in advance!
First time owner and questions
- Thread starter kinggirl
- Start date
- th_trl_thread_readers 0
- Status
I've been told to keep the ohms around 1.7 or above on a woodvil. Some veteran woody owners may chime in there with some more insight.
Hey kinggirl! Welcome to Reoville!
In order to determine a safe resistance level, you'll need to know a little bit about the battery that you'll be using as well as Ohm's Law.
For instance, the AW IMR 18650 1600mah batteries have a 15C rating. This means that the maximum continuous discharge rate (Amperes) is 15 times the 1600mah battery capacity (or 24A).
AW IMR 18650 1600mah Maximum Continuous Discharge Rate:
IB = 24A
AW IMR 18650 1600mah Maximum Voltage:
VB = 4.2V
Note: For safety purposes, we should always use the Maximum Battery Voltage and Maximum Battery Continuous Discharge Rate.
Now, given these two parameters, we can calculate the minimum "safe" resistance using Ohm's Law.
R = VB / IB = 4.2V / 24A = 0.175ohm
This means that any coil you wrap when using an AW IMR 18650 1600mah battery must have a resistance greater than 0.175ohm.
On to the coil. When calculating the resistance of a coil, there are a few parameters you'll need:
CD: Coil Diameter (inches)
CW: Number of Wraps
CL: Length of Coil Legs (inches)
KR: Resistance of Kanthal Wire (inches)
You can then use the following equation to determine the resistance of the coil.
Coil Resistance:
CR = (PI * CD * CW + 2 * CL) * KR
Note: this formula should work alright as long as you keep the units the same (inches, feet, centimeters, meters, etc...) Inches just seem to be what most are using. This is what people are describing with a 1/16 drill bit. 1/16 of an inch.
In order to determine a safe resistance level, you'll need to know a little bit about the battery that you'll be using as well as Ohm's Law.
For instance, the AW IMR 18650 1600mah batteries have a 15C rating. This means that the maximum continuous discharge rate (Amperes) is 15 times the 1600mah battery capacity (or 24A).
AW IMR 18650 1600mah Maximum Continuous Discharge Rate:
IB = 24A
AW IMR 18650 1600mah Maximum Voltage:
VB = 4.2V
Note: For safety purposes, we should always use the Maximum Battery Voltage and Maximum Battery Continuous Discharge Rate.
Now, given these two parameters, we can calculate the minimum "safe" resistance using Ohm's Law.
R = VB / IB = 4.2V / 24A = 0.175ohm
This means that any coil you wrap when using an AW IMR 18650 1600mah battery must have a resistance greater than 0.175ohm.
On to the coil. When calculating the resistance of a coil, there are a few parameters you'll need:
CD: Coil Diameter (inches)
CW: Number of Wraps
CL: Length of Coil Legs (inches)
KR: Resistance of Kanthal Wire (inches)
You can then use the following equation to determine the resistance of the coil.
Coil Resistance:
CR = (PI * CD * CW + 2 * CL) * KR
Note: this formula should work alright as long as you keep the units the same (inches, feet, centimeters, meters, etc...) Inches just seem to be what most are using. This is what people are describing with a 1/16 drill bit. 1/16 of an inch.
Last edited:
This is great! I'm worried it's WAY over my head though. 
I've been wrapping coils on my kayfun so I know how to build them and how to achieve whatever ohm I'm trying for. Most of my builds on the kayfun are in the 1.4-1.6 range. I just didn't know for safety purposes it would be much easier if someone said "don't build below X or above X." I really appreciate you taking the time to explain all that but I am concerned it got lost in translation. It took me back to high school trig class and I immediately felt my eyes glaze over except now I don't have a classmate sitting next to me where I can lean over and say "what does that mean?"
I've been wrapping coils on my kayfun so I know how to build them and how to achieve whatever ohm I'm trying for. Most of my builds on the kayfun are in the 1.4-1.6 range. I just didn't know for safety purposes it would be much easier if someone said "don't build below X or above X." I really appreciate you taking the time to explain all that but I am concerned it got lost in translation. It took me back to high school trig class and I immediately felt my eyes glaze over except now I don't have a classmate sitting next to me where I can lean over and say "what does that mean?" 
Kinggirl, congratulations! You'll love your REO. Are you used to building coils already? What atty are you using? I use my Woodvil with an RM2 ALL the time, and I always wrap my coils at .9 - 1.0 ohms. Great vape!! To get that, I basically wrap 28 gauge wire around a 16 gauge blunt syringe needle about 8 wraps, give or take, then wick it. Others will be around to help more. (You'll get more help than you'll know what to do with. Ha )
This is great! I'm worried it's WAY over my head though.
If you're used to wrapping coils. You're good. The coils you're used to wrapping (around 1.4) will be just fine. Don't sweat it at all. I go down to 1.0 ohms easily....and all the time.
Nice catch for your first REO, you must be fast on the draw
Don't have a Woody myself to answer your questions but you've come to the right place!
Congrats and welcome to the Ville!
Don't have a Woody myself to answer your questions but you've come to the right place!
Congrats and welcome to the Ville!
Sorry about that I get carried away with the math sometimes.
To be honest, I don't have a Woodvil. I have an Aluminum Mini. The Woodvills might not have the subohm upgrade yet (and this might be why pwheeler said not to go below 1.7 ohm).
As long as you aren't going subohm and you're not exceeding the maximum drain current, I think you'll be alright. I've been wrapping my coils between 1.2 and 1.6 ohms on a smaller battery (if that helps).
I'll let someone with more knowledge about the Woodvilles take over from here.
Sent from my XT1060 using Tapatalk
I get carried away with the math sometimes.To be honest, I don't have a Woodvil. I have an Aluminum Mini. The Woodvills might not have the subohm upgrade yet (and this might be why pwheeler said not to go below 1.7 ohm).
As long as you aren't going subohm and you're not exceeding the maximum drain current, I think you'll be alright. I've been wrapping my coils between 1.2 and 1.6 ohms on a smaller battery (if that helps).
I'll let someone with more knowledge about the Woodvilles take over from here.
Sent from my XT1060 using Tapatalk
I mentioned my purchase last night in another thread (I frequent the nicoticket since that's my fav juice) and most of them are always advising everyone to buy a reo so I did last night. Someone in that thread mentioned the woodvil aren't true mechanical in the fact that they have wires. So, you can't do certain ohms (they didn't mention specifically which) or else it would cause something to short out. I have a kayfun already so I am used to building coils I just didn't want to do something that would immediately require me to send it in for service by shorting something out.
Also, anyone know where to buy a replacement rm2 screw for the post? It was purchased with 1 missing. Otherwise everything is flawless. I looked on the reosmods website and can't find just a replacement screw.
Nice catch for your first REO, you must be fast on the draw
Don't have a Woody myself to answer your questions but you've come to the right place!
Congrats and welcome to the Ville!
Thank you! It was definitely one of those "right place right time" deals. I hit refresh on the classifieds looking for something and this was there. I responded literally within 1 minute lol.
reosmods.com will have the replacement screws. You will be fine. That Jatoba 18490 is gorgeous! I have it's identical twin!
They're under rebuildable atomizers & supplies. Reomizer 2.0 post screws.....but they show out of stock right now. PM redeyedancer and ask him if he has any. If he doesn't, PM me and I'll send you one. Hi, I'm Jan.
EDIT: Unless you're ordering other stuff, just PM me anyway. It'll be a lot cheaper (free) for me to stick one in an envelope with a stamp than it will be to pay shipping for a $1 order. I don't mind at all.
They're under rebuildable atomizers & supplies. Reomizer 2.0 post screws.....but they show out of stock right now. PM redeyedancer and ask him if he has any. If he doesn't, PM me and I'll send you one. Hi, I'm Jan.
EDIT: Unless you're ordering other stuff, just PM me anyway. It'll be a lot cheaper (free) for me to stick one in an envelope with a stamp than it will be to pay shipping for a $1 order. I don't mind at all.
Last edited:
Thank you! You are so sweet. I sent an email this morning to his email address from the contact info on the site. Hopefully he will reply soon and let me know.
I see you also got an Igo atty. you'll be all set. Just use it till you get the RM2 up and running. I'm excited for you.....you're going to LOVE it. You'll love the vape, but it doesn't hurt that you are going to have one stunning-looking REO! Just relax. It's going to be easy-peasy to get her up and running.
I've been to the Nicoticket thread and the people over there are awesome! Lots of mingling with them and us.......lots of Nicoticket users here, and lots of REO users there. Perfection attracts perfection.
I've been to the Nicoticket thread and the people over there are awesome! Lots of mingling with them and us.......lots of Nicoticket users here, and lots of REO users there. Perfection attracts perfection.
If you don't hear back from that e-mail....PM him here on the forum. He's here all the time.
You'll find Rob to be one of the best suppliers around about helping people new to Reo's.
Hello, good to see you made it to Reoville. I just make sure to keep a minimum of 1600mAh battery and my coils at or above 1.1 ohm's and have no worries. Some go a bit lower on the ohm's but I choose not to test the limits of the spring safety. They aren't designed to be sub ohm mods, and I don't want to have to replace the spring.
Lots of great people here and you're going to love your new Reo!
Last edited:
- Status
Similar threads
