1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Dracary Dry Nitrous Nozzle, model NS6550-1. Adherence to these instructions is crucial for safe and effective use. Please read this manual thoroughly before proceeding with any installation or operation.
2. Product Overview
The Dracary Dry Nitrous Nozzle NS6550-1 is a precision-engineered component designed for automotive nitrous oxide systems. It features a 1/16 inch NPT thread and a fogger discharge style, crafted from durable aluminum. Its design promotes the expansion of nitrous in a conical pattern, facilitating improved distribution within the intake tract.

Figure 2.1: Dracary Dry Nitrous Nozzle NS6550-1, showcasing its black anodized aluminum construction and threaded end.
3. Safety Information
WARNING: Nitrous oxide systems involve high-pressure gases and can be dangerous if not handled correctly. Professional installation is highly recommended.
- Always wear appropriate personal protective equipment, including eye protection and gloves, when working with nitrous oxide systems.
- Ensure the engine is off and cool before beginning any installation or maintenance.
- Never inhale nitrous oxide. Use in well-ventilated areas.
- Verify all connections are secure and leak-free before operating the system.
- Refer to the complete nitrous oxide system manufacturer's instructions for comprehensive safety guidelines.
4. Setup and Installation
Follow these steps for proper installation of the Dracary Dry Nitrous Nozzle:
- Preparation: Ensure the vehicle's engine is completely off and has cooled down. Disconnect the battery's negative terminal.
- Location Selection: Identify an optimal mounting location in the intake manifold or intake pipe that allows for even distribution of the nitrous spray.
- Drilling and Tapping: Carefully drill and tap a 1/16 inch NPT hole at the selected location. Ensure the hole is clean and free of any metal shavings or debris. Use a vacuum to remove any particles from the intake tract.
- Thread Sealant Application: Apply a high-quality, fuel-resistant thread sealant to the threads of the nitrous nozzle.
- Nozzle Installation: Carefully thread the nozzle into the prepared hole. Ensure the nozzle's discharge port is oriented correctly to achieve the desired conical spray pattern for optimal distribution.
- Torque: Tighten the nozzle securely. Refer to your nitrous system's recommendations for specific torque values, or tighten until snug, ensuring no leaks. Do not overtighten.
- Line Connection: Connect the nitrous feed line to the nozzle. Ensure this connection is also secure and properly sealed.
- Leak Test: Before operating the system, perform a thorough leak test using a leak detection solution or by pressurizing the system and checking for pressure drops.

Figure 4.1: Example of a nitrous nozzle connected to a feed line, illustrating a typical installation scenario.
5. Operating Instructions
The Dracary Dry Nitrous Nozzle functions as a critical component within a complete nitrous oxide system. Its operation is directly controlled by the overall system's activation and safety protocols. Refer to the instruction manual provided with your specific nitrous oxide system for detailed operating procedures, including arming, activation, and deactivation sequences. Ensure proper jetting is selected for your application to achieve desired performance and engine safety.
6. Maintenance
Regular inspection and maintenance will ensure the longevity and optimal performance of your nitrous nozzle:
- Inspection: Periodically inspect the nozzle for any signs of damage, corrosion, or blockages. Check the threads for wear or stripping.
- Cleaning: If blockages are suspected, carefully remove the nozzle and clean it using a suitable solvent that will not damage aluminum. Ensure all passages are clear before reinstallation.
- Replacement: If the nozzle shows significant wear, damage, or if the spray pattern is compromised, replace it with a new Dracary NS6550-1 nozzle to maintain system integrity and performance.
7. Troubleshooting
This section addresses common issues related to the nitrous nozzle:
| Issue | Possible Cause | Solution |
|---|---|---|
| Nitrous system not activating or poor performance. | Nozzle blockage or incorrect installation/orientation. | Inspect nozzle for debris. Ensure correct orientation for conical spray. Verify proper jetting for the system. |
| Nitrous leaks at the nozzle connection. | Improper thread sealant application, insufficient torque, or damaged threads. | Reapply thread sealant and re-torque the nozzle. If threads are damaged, replace the nozzle. |
8. Specifications
Key specifications for the Dracary Dry Nitrous Nozzle NS6550-1:

Figure 8.1: Detailed view of the Dracary Dry Nitrous Nozzle, highlighting its construction.
| Feature | Detail |
|---|---|
| Brand | Dracary |
| Model Number | NS6550-1 |
| Nozzle Discharge Style | Fogger |
| Nozzle Thread Size | 1/16 in. NPT |
| Nozzle Material | Aluminum |
| Exterior Finish | Black Anodized |
| Inlet Connection Type | National Pipe Tapered |
| Outlet Connection Type | NPT |
| Number of Ports | 1 |
| Item Weight | 0.211 ounces |
| Package Dimensions | 2.4 x 1.73 x 0.24 inches |
| UPC | 610877845453 |
9. Warranty and Support
For warranty information, technical support, or any inquiries regarding your Dracary Dry Nitrous Nozzle NS6550-1, please contact Dracary customer service directly. Keep your purchase receipt for warranty claims.