1. What is the Fuel Pump Calculation?

The Fuel Pump Calculation determines the required fuel flow rate based on injector size, number of injectors, and duty cycle. It helps ensure your fuel system can deliver adequate fuel for your engine's needs.

2. How Does the Calculator Work?

The calculator uses the fuel pump calculation formula:

Where:

• Injector size — Fuel injector flow rate in pounds per hour (lbs/hr)
• Number — Quantity of fuel injectors
• Duty cycle — Fraction of time injectors are open (0 to 1)

Explanation: The equation calculates the total fuel flow required by multiplying individual injector flow rate by the number of injectors and their operational duty cycle.

3. Importance of Fuel Flow Calculation

Details: Proper fuel flow calculation ensures your fuel pump can supply enough fuel for your engine's requirements, preventing lean conditions that could damage the engine.

4. Using the Calculator

Tips: Enter injector size in lbs/hr, number of injectors (typically 4, 6, or 8), and duty cycle as a decimal (e.g., 0.8 for 80%). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical duty cycle for fuel injectors?
A: Most systems are designed to run at 80% duty cycle (0.8) at maximum power to allow some headroom.

Q2: How do I convert lbs/hr to cc/min?
A: Multiply lbs/hr by 10.5 to get cc/min (approximately).

Q3: What happens if my fuel pump can't deliver the required flow?
A: The engine may run lean at high RPM/load, potentially causing detonation and engine damage.

Q4: Should I include a safety margin in my calculations?
A: Yes, it's recommended to have 20-30% more pump capacity than your calculated requirements.

Q5: How does fuel pressure affect these calculations?
A: Injector flow rates are pressure-dependent. Ensure your injector ratings match your system's fuel pressure.