I want to keep this tech article simple so the average person can generate their own opinion on what injectors they need for their project, budget, and power levels. The lower the BSFC number, the greater the engine's efficiency. The BSFC is the key to understanding an engine's efficiency of fuel consumption with respect to horsepower. What does this mean in terms of horsepower? To translate the horsepower level of an engine to the fuel injector flow rate, we use a term called BSFC or brake specific fuel consumption. If you double your airflow entering the engine you need to double the fuel delivery at the same rate to maintain the same AFR level. This is known as the air fuel ratio or AFR. To maintain good combustion and torque/power production from a four-stroke gasoline engine you need to achieve the proper parts fuel to air flow entering the engine. But how does the fuel injector relate to horsepower and why does it really matter? In order to provide the correct air to fuel ratio, the pulse will vary based on the rpm and load the engine is seeing.Īs a performance automotive enthusiast, it's no surprise that we all want power. The pulse is measured in milliseconds open time.
The length of time that the pulse occurs will deliver more or less fuel into the engine. The on-board computer controls the fuel injector by sending out a signal in the form of a pulse. They are an electrical-mechanical device that opens and closes allowing fuel to enter the engine's combustion chamber. On the surface, fuel injectors may seem simple. Fuel Injection Selection Guide What an average enthusiasts Need to know.
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