Nitrous Oxide Purge Solenoid
What is a Nitrous Oxide Purge Solenoid?
A nitrous oxide purge solenoid is a specialized valve component that plays a critical role in optimizing the performance of nitrous injection systems. The primary purpose of a nitrous purge system is to clear any gaseous nitrous oxide from the feed lines before it is injected into the engine. NOS purge valve kits are designed to "purge" nitrous oxide at the solenoid(s) for instant and consistent nitrous injection. The valves eliminate the lag time caused from vapor accumulation in the supply line. This ensures that only liquid nitrous oxide reaches the combustion chamber, maximizing the power boost and consistency of your system.
Why Purge Your Nitrous System?
When nitrous solenoids and feed lines are exposed to high temperatures, the liquid nitrous oxide in them may phase change to a gaseous state. Upon system activation, only gaseous nitrous oxide may be available to the engine for a very short period of time. The effect of this will be a slight decrease in performance from optimum. Purging is very necessary with nitrous cars, it rids the line of air and gaseous nitrous making sure the system delivers liquid nitrous to the cylinder, making the most power possible! By activating the purge solenoid before launching, racers ensure that the purge is to remove all gaseous nitrous and air from your main feed line. This puts liquid nitrous at the N2O solenoid resulting in a harder leave or "hit".
How Purge Solenoids Work
A typical nitrous purge system consists of several components, including a purge solenoid, a purge nozzle, wiring, and a switch to activate the purge. The solenoid is connected to the main nitrous supply line and the purge nozzle, which is usually mounted in a visible location, such as near the hood or front bumper. This activates the purge solenoid, which allows nitrous oxide to flow from the supply line, through the nozzle, and out into the atmosphere. The vented gas creates the dramatic white plume familiar to drag racing enthusiasts while simultaneously priming the system for optimal performance.
Installation and Performance Considerations
Proper installation of a nitrous purge solenoid requires careful routing of feed lines and vent tubes. The purge outlet must be directed away from the engine bay and passengers, as nitrous oxide can present safety hazards. Most systems feature simple electrical connections with a dedicated activation button mounted within the driver's reach. It is generally recommended to purge your nitrous system before each use of the nitrous oxide injection. This ensures that the nitrous oxide is in its liquid state when it reaches the engine, providing consistent and effective performance gains. Performance enthusiasts often purge just before launch to guarantee immediate nitrous delivery without hesitation or lag.
Top Brands for Nitrous Purge Solenoids
When selecting a purge solenoid for your nitrous system, quality and reliability are paramount. Nitrous Express stands as a leading manufacturer in the nitrous injection industry, offering purge solenoids designed for both street and competition applications with proven durability and consistent flow characteristics. Their Lightning series solenoids are particularly popular among drag racers and performance enthusiasts who demand instant activation and reliable operation under extreme conditions.
Choosing the Right Purge Solenoid
When shopping for a nitrous oxide purge solenoid, consider compatibility with your existing nitrous system, mounting location constraints, and whether you need integrated LED lighting for visual effect. Ensure the solenoid can handle the flow rate of your nitrous setup and features proper filtration to prevent debris from affecting valve operation. Whether you're building a weekend street car or a dedicated race machine, a quality purge solenoid ensures your nitrous system delivers maximum performance every time you activate it.