Baditude;13302448 said:If you are using the 2.0 ohm coils, around 4 volts should be a good starting point.
If you are using the 1.5 ohm coils, around 3.5 volts should be a good starting point.
A simple rule of thumb is to take the ohm rating, add the number "2", and the sum will be the voltage to use.
2 ohm + 2 = 4 volts.
1.5 ohm + 2 = 3.5 volts.