1. What is the Injector Flow Rate Equation?

The injector flow rate equation calculates how fuel injector flow changes with different fuel pressures. It's based on Bernoulli's principle, showing that flow rate is proportional to the square root of the pressure ratio.

2. How Does the Calculator Work?

The calculator uses the injector flow rate equation:

Where:

• \( BaseFlow \) — Original injector flow rate at base pressure (cc/min)
• \( BasePressure \) — Original fuel pressure (psi)
• \( NewPressure \) — New fuel pressure (psi)

Explanation: The equation accounts for the non-linear relationship between pressure and flow rate in fuel injectors.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate calculation is crucial for fuel system tuning, ensuring proper air/fuel ratios when changing fuel pressure.

4. Using the Calculator

Tips: Enter base flow rate in cc/min, both pressures in psi. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why does flow rate change with pressure?
A: According to Bernoulli's principle, fluid flow through an orifice is proportional to the square root of the pressure differential.

Q2: What are typical injector flow rates?
A: Stock injectors typically range from 150-300 cc/min, while performance injectors can go up to 2000+ cc/min.

Q3: When should I recalculate flow rates?
A: Whenever you change fuel pressure, upgrade injectors, or modify your fuel system.

Q4: Are there limitations to this equation?
A: It assumes ideal conditions and doesn't account for factors like injector dead time or non-linearities at extreme pressures.

Q5: How accurate is this calculation?
A: It provides a good estimate for most applications, but actual flow bench testing is more precise.