Injector Size Calculator

Calculate Injector Size







Formula

To calculate the Injector Size (IS):

\[ IS = \frac{(HP \cdot BSFC)}{(NI \cdot \frac{DC}{100})} \]

Where:

What is Injector Size?

Injector size refers to the flow rate of fuel injectors in an engine, typically measured in pounds per hour (lb/hr). It determines how much fuel can be delivered to an engine’s combustion chamber and is critical for achieving the desired horsepower while maintaining proper air-fuel ratios for efficiency and performance.

Example Calculation 1

Let's assume the following values:

Using the formula:

\[ IS = \frac{(300 \cdot 0.5)}{(4 \cdot \frac{80}{100})} = \frac{150}{3.2} = 46.88 \text{ lb/hr} \]

The Injector Size is 46.88 lb/hr.

Example Calculation 2

Let's assume the following values:

Using the formula:

\[ IS = \frac{(400 \cdot 0.45)}{(6 \cdot \frac{85}{100})} = \frac{180}{5.1} = 35.29 \text{ lb/hr} \]

The Injector Size is 35.29 lb/hr.