Easy lifehacks

# How are fuel injectors measured?

## How are fuel injectors measured?

Fuel Injectors are sized by their flow rate. Flow rate is a measurement of how much fuel can be delivered over time. It is listed in pounds per hour (lbs./hr.) or cubic centimeters per minute (cc/min.). For example, a naturally aspirated, 300 hp engine (BSFC 0.5), with 8 injectors will need 23.4 lbs./hr.

What is the best injector duty cycle?

For a large margin of safety, the factory ECU and injectors will most likely be set up to operate somewhere around 80-percent. So, at a 90-percent duty cycle, the injector might be open for 100-percent of the combustion cycle.

### How do you calculate the minimum fuel injector size?

If your horsepower goal exceeds this value, then you know you need to upgrade fuel system components.” To calculate the minimum injector size each of our engines will need, it’s as simple as taking our total pounds per hour fuel requirement from above and divide that value by the number of cylinders the engine has.

How do you test a fuel injector on a computer?

Touch the terminals (one at a time) of the harness connector with the test light. One of the terminals should make the test light glow, this is the injector power source coming from the computer. If the test light doesn’t glow, you’ve found the problem.

## How does fueltech calculate horsepower for fuel injectors?

FuelTech also offers the option to determine the maximum horsepower rating of fuel injectors by working backwards, using fuel injector sizing and other parameters.

Can you change the pressure of a fuel injector?

However, if you have an adjustable fuel pressure regulator, you can change the flow rating of a given injector to more closely match your engine’s needs. The calculation is simple if you know your fuel injectors’ static flow rating at a specific pressure.

If your horsepower goal exceeds this value, then you know you need to upgrade fuel system components.” To calculate the minimum injector size each of our engines will need, it’s as simple as taking our total pounds per hour fuel requirement from above and divide that value by the number of cylinders the engine has.

Touch the terminals (one at a time) of the harness connector with the test light. One of the terminals should make the test light glow, this is the injector power source coming from the computer. If the test light doesn’t glow, you’ve found the problem.

### How does my car calculate its fuel consumption?

Well it’s got an electronic tachometer (mileometer) which records how far you’ve travelled, and I imagine the engine-management computer knows proecisely how much fuel it’s injecting into the cylinders (it’s computer controlled after all)… so it’s fairly simple really!

FuelTech also offers the option to determine the maximum horsepower rating of fuel injectors by working backwards, using fuel injector sizing and other parameters.

Ruth Doyle