Skip to contentUnleash the power of nitrous oxide with the Nitrous Express Jet Chart, your ultimate guide to jet sizing, flow rate optimization, and achieving the perfect air/fuel ratio. Whether you’re a seasoned tuner or a nitrous newbie, this chart will empower you with the knowledge and precision you need to maximize your nitrous system’s performance.
As you embark on this journey, remember that safety is paramount. Always adhere to proper maintenance and inspection protocols to ensure a thrilling and responsible nitrous experience.
Nitrous Express Jet Chart Overview
The Nitrous Express Jet Chart is a valuable tool for determining the proper jet size for your nitrous system. It is a comprehensive guide that provides jet sizes for various engine applications, nitrous flow rates, and fuel pressure settings. The chart helps ensure optimal performance and safety by allowing you to select the correct jet size for your specific setup.
Chart Types and Uses
Nitrous Express offers several types of jet charts, each tailored to specific applications:
- Standard Jet Chart:Provides jet sizes for standard nitrous systems with wet or dry setups.
- Direct Port Jet Chart:Designed for direct port nitrous systems, where nitrous is injected directly into each cylinder’s intake port.
- Plate System Jet Chart:Used for nitrous systems that utilize a nitrous plate mounted between the carburetor and intake manifold.
Jet Sizing and Selection
Selecting the right jet size is crucial for optimizing the performance of your nitrous system. Consider the following factors:
- Engine Size:Larger engines require larger jets to deliver the necessary amount of nitrous.
- Nitrous Flow Rate:The desired nitrous flow rate will determine the jet size.
- Fuel System:The type and size of your fuel system can affect the required jet size.
- Nitrous Solenoid:The size of the nitrous solenoid will impact the flow rate and, consequently, the jet size.
To use the Nitrous Express Jet Chart, locate the appropriate engine size and nitrous flow rate on the chart. The intersection of these values will provide the recommended jet size.
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Jet Sizing Calculations
You can also calculate the approximate jet size using the following formula:
Jet Size (inch) = (Nitrous Flow Rate (lbs/hr) / (Pressure Drop (psi)
Fuel System Multiplier))
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Where:
- Nitrous Flow Rate:Desired nitrous flow rate in pounds per hour.
- Pressure Drop:The pressure drop across the jet in pounds per square inch (psi).
- Fuel System Multiplier:A factor that accounts for the type and size of the fuel system.
For example, to calculate the jet size for a 350 cubic inch engine with a desired nitrous flow rate of 150 lbs/hr, a pressure drop of 100 psi, and a fuel system multiplier of 0.85, the calculation would be:
Jet Size (inch) = (150 lbs/hr) / (100 psi
0.85) = 0.176 inch
Nitrous Flow Rate and Pressure: Nitrous Express Jet Chart
The relationship between jet size, nitrous flow rate, and pressure is crucial for determining the optimal performance of a nitrous system. The jet size directly affects the flow rate of nitrous, which in turn influences the pressure within the system.
To determine the nitrous flow rate and pressure for a given jet size, refer to the Nitrous Express Jet Chart. The chart provides a table summarizing the flow rates and pressures for different jet sizes. The flow rate is measured in pounds per hour (lb/hr), while the pressure is measured in pounds per square inch (psi).
Nitrous Flow Rate and Pressure Table
The following table summarizes the nitrous flow rates and pressures for different jet sizes:
| Jet Size | Nitrous Flow Rate (lb/hr) | Nitrous Pressure (psi) |
|---|---|---|
| 0.030″ | 100 | 750 |
| 0.035″ | 125 | 850 |
| 0.040″ | 150 | 950 |
| 0.045″ | 175 | 1050 |
| 0.050″ | 200 | 1150 |
Fuel Jetting and Air/Fuel Ratio
Fuel jetting is crucial in maintaining the optimal air/fuel ratio when using nitrous oxide injection. The fuel jet size determines the amount of fuel added to the engine to compensate for the increased oxygen introduced by the nitrous.
To determine the appropriate fuel jet size, refer to the Nitrous Express Jet Chart. Locate the nitrous flow rate (in horsepower) and follow the corresponding row to find the recommended fuel jet size. For example, if you’re using a 100-horsepower nitrous system, the chart suggests a fuel jet size of 70.
Fuel Jetting Calculations
- To calculate the fuel jet size based on nitrous flow rate and desired air/fuel ratio, use the following formula:
- Fuel Jet Size = Nitrous Flow Rate (hp) x (Desired Air/Fuel Ratio – 1) / (Stoichiometric Air/Fuel Ratio – 1)
- For instance, if you want to maintain an air/fuel ratio of 12.5:1 with a 100-horsepower nitrous system, the calculation would be:
- Fuel Jet Size = 100 x (12.5 – 1) / (14.7 – 1) = 71.43
- Therefore, the closest fuel jet size available would be 72.
Troubleshooting and Safety Considerations
Using a Nitrous Express Jet Chart requires attention to potential problems and safety measures. This section will address common issues and provide guidance for safe and effective nitrous oxide system operation.
Troubleshooting Tips
Several issues can arise when using the Nitrous Express Jet Chart. These may include:
- Incorrect jet sizing: Using jets that are too small or too large can lead to performance issues or engine damage.
- Fuel pressure problems: Insufficient or excessive fuel pressure can affect nitrous oxide flow and engine performance.
- Ignition timing issues: Improper ignition timing can cause detonation and engine damage.
- Leaks: Nitrous oxide systems must be properly sealed to prevent leaks, which can lead to performance issues or safety hazards.
Safety Guidelines, Nitrous express jet chart
Nitrous oxide systems can be hazardous if not used properly. Always follow these safety guidelines:
- Use only high-quality components and follow manufacturer’s instructions.
- Install the system in a well-ventilated area and away from heat sources.
- Purge the system before each use to remove air and moisture.
- Never use nitrous oxide without proper safety equipment, including gloves, eye protection, and a respirator.
- Inspect the system regularly for leaks and other issues.
Importance of Maintenance and Inspection
Regular maintenance and inspection are crucial for the safe and efficient operation of a nitrous oxide system. This includes:
- Checking for leaks using a leak detector.
- Inspecting hoses, fittings, and valves for damage or wear.
- Replacing jets as needed based on engine modifications or fuel changes.
- Cleaning the nitrous oxide solenoid and fuel solenoids regularly.
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