What I do not quite understand about VV/VW mods...

[Numba20]

Ok, so I guess it would just be easier to give an example.

VV/VW mod
accepts .2-3.5 ohms
3-9.3 volts
50w

We'll say I'm running a .2 ohm coil.

If I select 9 volts, that means I'm pushing 405w at the coil according to ohms law.

so how is it that I can surpass the watt limitation using the volt setting? Or would the mod just fire lower at 3.16v to make it 50w even though its set on 9v?

 

[Bunnykiller]

you cant.... the mod will adjust down to its upper max limit watt wise...

 

[Silver5656]

when a mod is 50w, or 9.3 volts, that is the MAX, meaning you will max out at 50 w BEFORE you hit 9.3 volts. The specs show the best possible range, not a guaranteed range

 

[Bunnykiller]

when a mod is 50w, or 9.3 volts, that is the MAX, meaning you will max out at 50 w BEFORE you hit 9.3 volts. The specs show the best possible range, not a guaranteed range

yup thats how it will go.... it will auto adjust the voltage down to achieve the max watt settings

 

[Bunnykiller]

or it will give you an error code of too low of an ohm for the set voltage...

 

[Gabiano87]

Love the banner BUNNYkiller

 

[Numba20]

Okay so my guess was correct. Lol

What about the flip side? 3.5ohm.

50w would mean 13.23 volts, but the mod can't go that high. So the actual ceiling is 24.71w and 9.3 volts right?

 

[p7willm]

A lot of the newer regulated mods are VW mods and do not let you set the voltage, they calculate it with Ohm's law and a reading of your atty.

Even if it is a vv/vw mod and allows you to set the voltage it also checks the atty, sees that at 9 volts and .2 ohms you are over the watts so it does something, Not fire, or change voltage. I prefer not fire since I told it what I want and if it can't do it I would rather not have it make up something.

If you put a atty with a higher resistance you will be able to use the 9.3 volts and still be under 50 watts.

the same problem exists on the bottom If you stick a .2 Ohm atty on and say you want the minimum wattage of 7 a DNA board will fire anyway and give you substantially more than 7 watts.

 

[Bunnykiller]

a 1.6 ohm coil at 9 V should give you the 50W

V squared / R = W

81/1.6 = 50ish

 

[dice57]

Max amp out but is the limiting factor, generally that's been ~14-16 amps, though have seen one that will do 43 amps, but only max volts of 5. It's all a juggling act, and unless familiar with all the specs as applied to ohms law, one may be discouraged when getting a high amp regulated. Most are more suited to sub ohm builds to get the max watt/amp outputs. or something like that