The "I'm new to nickel builds, help me please!" Thread

[jevans]

VapingBad
Many thanks VB, I'll give that a go.


Jim

[tim]

Sept 14, 2015 12:19:33 GMT VapingBad said:

Sept 13, 2015 12:20:17 GMT jevans said:

I'm a little disappointed.
Sigelei 75W
Magma RDA
0.32 NI200
10 turns on a 3mm mandrel
0.14 Ohms
Temp 200C 30W
Vape cloud acceptable, but could be better
Flavour poor
Is it my coil, my RDA or is it just me?


Jim

VapingBad

Sorry VB, but I couldn't of anyone else to tag!

I have not used any of that kit, but I suspect that there is not enough contact area between the coil and wick, putting it into SteamEngine calc for that gauge wire, 3 mm former & 30 W recommends around 14 wraps.

Are you sure John? www.steam-engine.org/coil.asp?mat=ni200&r=0.14&hfnw=30&dia=0.32&id=3

[VapingBad]

Sept 14, 2015 20:03:58 GMT tim said:

Sept 14, 2015 12:19:33 GMT VapingBad said:

I have not used any of that kit, but I suspect that there is not enough contact area between the coil and wick, putting it into SteamEngine calc for that gauge wire, 3 mm former & 30 W recommends around 14 wraps.

Are you sure John? www.steam-engine.org/coil.asp?mat=ni200&r=0.14&hfnw=30&dia=0.32&id=3

Yes, although it should be viewed as a rough guide rather than gospel, but it does normally give a good starting point with the heat flux showing green or medium.  The one I posted the heat flux is 176 mW/mm² @ 30 W (green medium) and the 10 wrap one is 254 mW/mm² (yellow warm).  The 14 wrap should be good from 27 W - 35 W, where as the 10 wrap 18 W - 24 W.  Again it is a rough estimate so 12 or 13 wrap may still be good and I better than 10.

[tim]

Sept 14, 2015 20:17:59 GMT VapingBad said:

Sept 14, 2015 20:03:58 GMT tim said:

Are you sure John? www.steam-engine.org/coil.asp?mat=ni200&r=0.14&hfnw=30&dia=0.32&id=3

Yes, although it should be viewed as a rough guide rather than gospel, but it does normally give a good starting point with the heat flux showing green or medium.  The one I posted the heat flux is 176 mW/mm² @ 30 W (green medium) and the 10 wrap one is 254 mW/mm² (yellow warm).  The 14 wrap should be good from 27 W - 35 W, where as the 10 wrap 18 W - 24 W.  Again it is a rough estimate so 12 or 13 wrap may still be good and I better than 10.

Yes, but I thought that drippers, with the increased air flow should be run at warmer (orange) temperatures, as the increased air cools the coil much quicker, thus producing more vapour. Maybe I mis-read that somewhere, but it seems to work in real life.

[jevans]

Please carry on you two, I'm all ears!


Jim

[VapingBad]

Sept 14, 2015 20:34:18 GMT tim said:

Sept 14, 2015 20:17:59 GMT VapingBad said:

Yes, although it should be viewed as a rough guide rather than gospel, but it does normally give a good starting point with the heat flux showing green or medium.  The one I posted the heat flux is 176 mW/mm² @ 30 W (green medium) and the 10 wrap one is 254 mW/mm² (yellow warm).  The 14 wrap should be good from 27 W - 35 W, where as the 10 wrap 18 W - 24 W.  Again it is a rough estimate so 12 or 13 wrap may still be good and I better than 10.

Yes, but I thought that drippers, with the increased air flow should be run at warmer (orange) temperatures, as the increased air cools the coil much quicker, thus producing more vapour. Maybe I mis-read that somewhere, but it seems to work in real life.

I have seen ppl saying run a higher temp in a dripper and I don't buy it myself YMMV, IMO if you find what heat flux works best for your liquid then use that.   PG:VG ratio would make a difference to the temp you set, the higher VG the higher temp needed to create vapour and maybe that is the root of those theories.  We are all different so...

Raising the number wraps has normally given me better flavour.

[tim]

Yeah, I guess it's horses for courses VapingBad. I prefer more wraps too.

[jevans]

VapingBad
Did exactly as you said VB, came out spot on 0.2 ohms.
Flavour much improved + a more satisfying cloud.
Many thanks.


Jim

[jevans]

chykensa
What coil dims and temp setting have you settled on, or is it a secret?
After much advice I've settled on 205C 400F with 14 turns of 0.32 Ni200 on a 3mm mandrel.
This is using a Magma RDA.


Jim

[robby]

I`m finding on the Magma that 3.5 mm diameter coils work very well, experimenting with SS coils at the moment. Much easier to work with than nickel or Titanium, working on both the Xcube and the DNA200 very well in TC mode. It`s probably not technically correct, but I feel much better/safer vaping from SS than Nickel or Titanium. 

[jevans]

robby
Does SS have similar resistance properties to Nickel?


Jim

[robby]

It does have similar properties Jim, but different values,do-able on the DNA200 and Xcube for sure

Haven`t tried any other mods yet, fine tuning these two first

[jevans]

Sept 24, 2015 9:28:27 GMT robby said:

It does have similar properties Jim, but different values,do-able on the DNA200 and Xcube for sure

Haven`t tried any other mods yet, fine tuning these two first

I shall watch this space impatiently!

Jim

[VapingBad]

Sept 24, 2015 9:23:35 GMT jevans said:

robby
Does SS have similar resistance properties to Nickel?


Jim

No the key property here TCR is more than 6 times higher in nickel than SS, making nickel far more sensitive than SS and a about 50% more sensitive than titanium.  SS got popular as it sort of does a similar thing to Evolv's temp limited pre heat on unregulated mods, as the resistance raises a little with temp it uses more power until up to temperature.

[jevans]

I have now double coiled my Magma (0.1 ohms) and am getting great results!


Jim