What coils builds are everyone doing on the Fogger v4+? Just curious...

[supersport13]

So last night I built a dual micro coil with 28g kanthal on 5/64 drill bit with 14 wraps each coi. It came out at .7 ohms.Wicked it w/cotton and using on a Magneto mech mod.. Vapor production isn't nearly what it should be and I used a brand new battery (sony vtc5). Cant figure it out. So I thought I'd like to see what everyone else is building their coils with for the v4. Thanks guys!

 

[Tbev]

I've run cotton, silica and xc -116 everywhere from 0.5 0hm to 1.4ohm and I gotta say i think flavor starts to disappear under 0.70hm, cotton is the best, and I've got a 1.4ohm 32ga build on my ProVari and it hits just as good as 0.8 0hm.


The wicks pictured below have been trimmed shorter than the pics.

Silica 1.4ohm

Xc -116 0.7 ohm

 

[State O' Flux]

So last night I built a dual micro coil with 28g kanthal on 5/64 drill bit with 14 wraps each coi. It came out at .7 ohms.Wicked it w/cotton and using on a Magneto mech mod.. Vapor production isn't nearly what it should be and I used a brand new battery (sony vtc5). Cant figure it out. So I thought I'd like to see what everyone else is building their coils with for the v4. Thanks guys!

The math on your coils doesn't work out. For a net resistance of 0.7Ω, using 28 ga. wire on a 5/64" mandrel... the individual coils should be more in the neighborhood of 10 wraps... not 14. Are you sure that's a 5/64" drill bit, and not the more likely 3/64"?

Moving on to another area. The magneto... have you checked the overall resistance/continuity of it? Do you have a DMM to check a mech with? If you have any resistance in the button assembly, or anywhere else, this would contribute to a reduction of performance at the coil.

Wick. Those are small ID coils. Threading a cotton wick through them will require a pretty small quantity of cotton to start... or more cotton, very tightly and densely rolled. If you've done the latter... i.e. too dense a wick, that may be your problem, as cotton doesn't work all too well when highly compressed.

Juice. What's the VG percentage? High VG, combined with dense wick means poor capillary action. Inversely, High PG is not known for terrific vapor production.

Last area. A brand new VTC5 battery. Was it purchased from a reputable vendor? You sure it's genuine? After charging, does it meter (again... do you have a DMM?) at or near 4.2v? How quickly does it discharge?

Back to you...

 

[supersport13]

The math on your coils doesn't work out. For a net resistance of 0.7Ω, using 28 ga. wire on a 5/64" mandrel... the individual coils should be more in the neighborhood of 10 wraps... not 14. Are you sure that's a 5/64" drill bit, and not the more likely 3/64"?

Moving on to another area. The magneto... have you checked the overall resistance/continuity of it? Do you have a DMM to check a mech with? If you have any resistance in the button assembly, or anywhere else, this would contribute to a reduction of performance at the coil.

Wick. Those are small ID coils. Threading a cotton wick through them will require a pretty small quantity of cotton to start... or more cotton, very tightly and densely rolled. If you've done the latter... i.e. too dense a wick, that may be your problem, as cotton doesn't work all too well when highly compressed.

Juice. What's the VG percentage? High VG, combined with dense wick means poor capillary action. Inversely, High PG is not known for terrific vapor production.

Last area. A brand new VTC5 battery. Was it purchased from a reputable vendor? You sure it's genuine? After charging, does it meter (again... do you have a DMM?) at or near 4.2v? How quickly does it discharge?

Back to you...

Thank you for the reply, how do I check my Magneto? Well, I used a 5/64 bit, I'm sure of it. I'm sure I did 14 wraps and it ohmed out at like .77 ohms. To me, an atty with thatr low of ohms should fire on a full charged mech like gangbusters, but it just doesn't. I'm starting to wonder if it IS my magneto. How should I go about checking to make sure it working right? BTW, my juice is a 70/30 vg/pg ratio.

 

[State O' Flux]

Thank you for the reply, how do I check my Magneto? I'm starting to wonder if it IS my magneto. How should I go about checking to make sure it working right? BTW, my juice is a 70/30 vg/pg ratio.

The high VG can be a contributing factor, if the wick is too dense or fit in the coils too tightly... something to consider.

To properly test your magneto, you need a DMM, which will allow you to test point to point continuity and resistance... both in the mech itself, and with the atty installed.
Enjoying mechs and rebuildables to their highest levels of performance, without benefit of a DMM to confirm there is no unseen restriction to that performance, is being, effectively... in a state of "electrical blindness".

An alternative would be to fit an in-line volt meter... which will tell you output, through-voltage as compared to battery voltage... but still not tell you where you might have an excess of resistivity, or allow direct (easy) comparisons with other testers and devices.

You don't need to spend hundreds of dollars on a Fluke DMM (unless of course you want to)... but a well placed $50 will get you a very serviceable one. I also recommend, for the novice electrical diagnostician... a book.

 

[supersport13]

Ya know, maybe I have a short somewhere, because you are right, I should have gotten a way higher resistance with the 14 wraps per coil. I'll have to rebuild 2nite and recheck. Arggh, so tired of using a suringe to suck out the juice, then put it back in, then out....oh...the humanity! Thanks state o' Flux!