There's a number of factors that determine how much vapor you will get. The voltage your battery is putting out, the resistance of your atomizer coil, and the makeup of your liquid(higher VG content=more vapor), those are the main contributors. So, what voltage are you running at, what's the ohms rating of your atomizer coil, and what's the PG/VG ratio of the liquid you're using? Also, what equipment are you using?