Help with Quad Coil build please

[Dreadp1r4te]

I finally broke down and bought a rebuildable atomizer the other day and while I loved my first build, a .21 ohm dual-coil setup, I'm having some trouble with the second build; a .24 ohm quad-coil build. It's on a Poseidon RDA, designed for 4 coils, and I'm using 26 gauge kanthal wire; 9 wraps around a fairly small (unsure of exact size) hex Allen wrench.

The dual coil build was about the same thing, except it was 6 wraps of 24 gauge, slightly smaller diameter, with near the same end resistance of .21 ohms, and it vaped like a train, heating up instantly and producing clouds of vapor, but the quad coil build takes about 3-4 seconds to heat up, and then produces less vapor despite using the same juice as before. I used a butane torch to heat the coils and pinch them together to keep them as tight as possible, and dry fired them before putting the cotton in, but even dry the coils took 4-5 seconds before they began to glow.

If it matters, I'm using the Sony VTC4 30-amp continuous/60-amp pulse 18650 batteries. Tested at full charge and partially depleted with same result. Any help would be greatly appreciated.

Pics here:
Quad Coil Poseidon - Imgur

 

[rodeo302]

When you have 4 coils at the same resistance as 1 you are splitting the wattage across those coils each one doesn't get that power so it will take longer to heat up and is your battery fully charged?

 

[Ryedan]

Agree with rodeo. I use the Steam Engine coil wrapping calculator to model new builds. 'Heat capacity' indicates how long it will take for the coils to heat up. They call it 'coil lag'. 'Heat flux' affects coil temperature. You don't want either of these to go too high.

I suggest you enter the data for the dual coil build and check those numbers. You like the way that vapes so the numbers you get from this build are in the ballpark of what you want for the quad. They don't have to be identical, but if the numbers are way off, the vape will be way different.

Then change to the quad build and compare. I bet the heat capacity of the quad will be way higher than the dual (long heat up time) and the heat flux will be way less (cool coil temp). Try going up a wire gauge or two while keeping the resistance the same and it will get better.

If you have trouble with it let me know and I'll help you with it.