Which system operates by using a simple fogger-style nozzle to deliver fuel and nitrous into the induction system?

• A. Wet System
• B. Direct Port Dry System
• C. Direct Port Wet System
• D. Dry System

Answer: (A)

The key idea is how nitrous is introduced into the engine: a single fogger-style nozzle delivering a mist of nitrous and fuel into the intake is the hallmark of a wet system. In a wet setup, fuel and nitrous are mixed and sprayed together through one nozzle into the induction tract, giving a simple, unified delivery method.

Direct port systems deliver nitrous (and sometimes fuel) directly into each cylinder’s intake port, using multiple nozzles, so that setup isn’t described as a single fogger nozzle. Dry systems inject nitrous through a nozzle as a dry stream and rely on the engine’s fuel system to add the needed fuel, which also doesn’t match the idea of delivering a combined fuel/nitrous mist via one nozzle.