Fuel Injector Calculator

How to Use the Fuel Injector Calculator

The Fuel Injector Calculator is a powerful tool designed to help you determine the appropriate fuel injector specifications for your engine setup. By following these steps, you can ensure your engine runs efficiently and effectively.

Step 1: Gather Necessary Engine Information

• Engine Size (cc): Obtain the engine displacement in cubic centimeters (cc). Ensure the value is between 500 and 10,000 cc.
• Number of Cylinders: Count the number of cylinders your engine has and provide a number between 1 and 16.
• Maximum RPM: Determine the maximum revolutions per minute (RPM) your engine can achieve, ranging from 1,000 to 15,000 RPM.
• Desired Horsepower: Set a target horsepower for your engine, ensuring it falls within 50 to 2,000 HP.
• Fuel Pressure (PSI): Measure the fuel pressure in pounds per square inch (PSI) and enter a value between 30 and 100 PSI.
• Injector Duty Cycle (%): Decide on the duty cycle for the injector, which should be between 30% and 85%.

Step 2: Enter the Data into the Calculator

Using the gathered engine information, input each value into the corresponding fields of the Fuel Injector Calculator. Follow the specified ranges and increments to ensure valid inputs.

Step 3: Review the Result Fields

• Required Flow Rate (cc/min): This field displays the necessary flow rate of the injector in cubic centimeters per minute. It is calculated using your desired horsepower, duty cycle, and number of cylinders.
• Flow Rate (lbs/hr): This field provides the flow rate in pounds per hour, based on the cc/min value.
• Recommended Injector Size: This field suggests the optimal injector size, rounded up to the nearest ten, to meet your flow rate requirements.
• Safety Margin: The safety margin, displayed as a percentage, indicates the buffer between the recommended injector size and the required flow rate, ensuring reliable operation under varying conditions.

Step 4: Implement the Recommendations

After reviewing the calculations, use the recommended injector size and flow rate information to select the appropriate fuel injectors for your engine. Incorporating the safety margin allows for variations in performance and helps sustain engine efficiency and longevity.