Coil heating question......

[pmcode]

Started wrapping my own coils......

I am using some 2.5mm silica I got from eBay with my "little black box" ohm tester. I have found that one of those "magic" wall hooks thingies provides a great size wrap for the wick. With about 10-11 wraps, I am getting 1.5 ohms, and a b.e.a-utiful glow on the coil.

Here is the problem...Cranking my eVic up to 5Vs, it takes almost 4 seconds for the coil to start to glow. Is this normal? should it glow faster? Does the juice atomize before the coil glows? Seems to take forever to get a good hit off of it, regardless of air hole adjustment.

Any (good) ideas...


Addendum...I am using either 28 or 30 guage kanthal, can't remember, and can't find the package.

 

[vapdivrr]

most likely it is 28g wire. not sure on the diameter of your coil but 10 or 11 wraps is kind of normal for a micro coil with this gauge wire. with this amount of wraps it does take a second to heat up. I have done this same set up before on a provari and although it does take a little time, I don't think it took 4 whole seconds. if the coil is heating up nicely there most likely is not anything wrong with it. I don't know to much with the e-vic so I cant elaborate on it, but at 5v and a 1.5 ohm coil it should be pushing 15 watts. If the evic does go up to 15 watts then that's ok, also it depends on the amp limit of your mod. if it is limited to lower amps then 3.5 or 3.0 then maybe your not really getting 15 watts onto the coil. I do know the provari maxes out at 15 watts and 3.5 amps and with this same set-up you have it pushes it fine but if your mod has an amp limit lets say at 2.5 amps, then your really not getting enough wattage to heat up that coil fast enough. anyways if it bothers you, you have 2 options, one is to use a thinner wire, the second is to reduce the wrap by one or two.

 

[State O' Flux]

I think... not absolutely certain, but think - the eVic maxes out a 2.5amps/11 watts.

 

[vapdivrr]

hey buddy just looked up the specs on the evic. it has a 2.0 amp limit, this means it has a max of 11 watts of power. I think with this mod your kind of limited on the set ups. I think it responds better at higher resistances and higher resistances mean thinner wire. if your using 28g now definity switch to 30g. so basically the evic doesn't have the power to run such a thick wire and so much of this thick wire quickly enough

 

[boathook]

I have an evic and while 1.5 Ohms is usable, it's definitely hitting a limit. 32 Gauge 2.2 Ohm works a bit better for me.

Currently my evic's got a 1.7 Ohm 28 gauge microcoil in an IGO and it's working nicely. I just took the wick out and dry-burned. Once the coil was dry, it starts glowing at 1.1 second. Remove the atty and re-check the resistance. My IGO-W is fiddly as all hell on the connections. I have to constantly re-tighten the screws.

I had one build that the resistance kept jumping around. It was actually a broken lead on the coil that the screw crushed because I tightened it down too much. It was "sort of" held in place, but as soon as I touched it it came loose completely. One hit the evic would read 1.5 ohm, the next 6.9 ohms, the next 0.9 ohms and an atomizer short message.

The evic is limited, but definitely should be usable for you.

 

[vapdivrr]

no doubt that with the right micro coil 11 watts is sufficient, even with 28g wire, it just will take slightly longer to heat then if you had more power. the thinner the wire the faster it will heat, so if the slow heating is bothering you try 30g.

 

[pmcode]

I think some of it may be the sh!ttines of my wanna-be RDA.

I had to actually take it and tap down on the center pin, cause the center is press-fit in, and was too high to make good contact.




What sucks the most (pun NOT intended) is that I cannot, for the life of me, get anything decent as far as vapor goes out of this thing. No matter how I set the airflow ring. The juice is an 80/20 blend, and using the same juice in a knock-of evod attached to the eVic, at 1.8ohms, I get decent TH and not exactly "clouds" of vapor, but decent, at about 3 seconds per draw. Also, the taste is almost nill on the RDA.

???

I am very-un-patiently awaiting my IGO-L and Trident order from FT.....

 

[Thrasher]

thats way too many wraps for a normal coil with that wire. you will never get any performance (as in response time) from a high resistance 28g coil on a regulated mod. get some 32g and do a 4 or 5 wrap normal coil for around 2 ohms and that thing will light up.

 

[State O' Flux]

What sucks the most (pun NOT intended) is that I cannot, for the life of me, get anything decent as far as vapor goes out of this thing. No matter how I set the airflow ring. The juice is an 80/20 blend

80/20 doesn't lend itself well to good vapor. 20/80 yes, but not the other way 'round.

 

[boathook]

What sucks the most (pun NOT intended) is that I cannot, for the life of me, get anything decent as far as vapor goes out of this thing. No matter how I set the airflow ring. The juice is an 80/20 blend, and using the same juice in a knock-of evod attached to the eVic, at 1.8ohms, I get decent TH and not exactly "clouds" of vapor, but decent, at about 3 seconds per draw. Also, the taste is almost nill on the RDA.
.

80/20 may not make the thickest clouds of vapor, but it will still make decent vapor. The output of the RDA should be similar to that of the EVOD when using higher-PG juice in my experience.

There are still a couple of things to try.

1. Pre-heat the coil. If it's taking 4 seconds to heat up, give it a head start before puffing on it. Give it power for 4 seconds, release the button, and then press it again and take your long lung inhale. (Works for me quite often)
2. Check the wick. Make sure it's not stuffed into the coil too tightly. Less is more in my experience.
3. Check the coil placement. You want it as close to the air hole as possible whilst still allowing full airflow. I have my coil canted at an angle to make the incoming airflow hit perpendicular to the coil (if that makes sense). You can also adjust the coil slightly lower than the air hole or slightly higher than the air hole for different effects. I tend to get more vapor when the coil sits lower than the air hole.

I'll be interested to hear if there's a difference with the IGO-L when you get it up and running. If the air hole on it is anything like the IGO-W, you'll definitely want to drill it out.

thats way too many wraps for a normal coil with that wire. you will never get any performance (as in response time) from a high resistance 28g coil on a regulated mod. get some 32g and do a 4 or 5 wrap normal coil for around 2 ohms and that thing will light up.

Nah, microcoils with 28 gauge work just fine on the evic. You will definitely get better "response time" from thinner wire, but with a quick preheat of the coil, the thicker wire works fine.

 

[LeoRex]

Yeah .. my IGO-l needed to have the vent drilled out, not hard to do. Works great.

A 10 wrap, 28g coil should work fine on a regulated mod at 10 or 11 watts.. my IGO is at 1.5 on my Vamo...at 10.5/11 it vapes great and puts it a ton of vapor (50/50).

As for the time... the temp that the coil needs to hit to glow is far higher than the temp needed to vaporize juice. When I dry burn my empty coil on my Vamo, yeah... takes a good 3 or 4 seconds to glow... But juiced up, it'll start throwing vapor not long after I fire it.

 

[Thrasher]

Nah, microcoils with 28 gauge work just fine on the evic. You will definitely get better "response time" from thinner wire, but with a quick preheat of the coil, the thicker wire works fine.

your right but check the pic, thats far from a micro and closer to the size of a bed spring.

 

[armoworrior]

If you are using the evic it will not go over 11 watts. Thats your whole problem

 

[vapdivrr]

your right but check the pic, thats far from a micro and closer to the size of a bed spring.

bed spring, that looks more like the spring on my truck suspension. I thought the op said 10 wraps? that coil is like 15 wraps, to many for sure if using 28g wire on an 11 watt device. also when you do reduce the wraps, or better yet change to 30g wire and reduce the wraps by a few, try to get all wraps tight. the end wraps you have are very loose and are a little sloppy. keep the drill bit in the coil as you tighten up the screws, this will help to hold the coil together as you tighten it up. and coil location is key, it needs to be more or less in line with the air hole, also don't be afraid to bring out the coil closer to the edge a little more, this will bring it closer to the air hole laterally. good luck