That completely depends on the type of injector needed and the application(engine)
The typical 350 cubic inch Chevrolet engine requires a fuel pressure of 12 to 18 psi. The exact fuel pressure required is dependent upon the year and the engine application.
Collect enough fuel to create a sustainable fire that will burn steadily and safely. The amount of fuel needed will depend on the size of the fire you want to build. It's important to have a sufficient amount of fuel to keep the fire going without adding more constantly.
When your engine takes in gas, it only takes in a certain amount depending how hard the engine is being pushed, the fuel pump constantly pushes the same amount of fuel so something is needed to regulate how much fuel is going to go into the engine, the unused fuel goes through the return line back to the fuel tank.
A car can start with very little fuel at the engine. However, there needs to be enough fuel in the tank to allow the pump to pressurize the lines and keep fuel to the injectors.
The recipe for an engine to run is, Spark, Fuel, Air,,,, But there is much more needed as you know.,,,,,,,,,,,,, This is where I would go from you left me: Check the ignition timing, Check the valve timing, Make sure the fire is hot enough, If its orange or yellow, its not hot enough.
500,000,000
A four-cylinder engine does not require as much fuel as a six-cylinder, which requires half again as much fuel every time the pistons fire. A six-cylinder is more powerful, too, and accordingly uses more fuel. Four-cylinders are more economical, and if they are properly maintained, are more efficient.
It's just the complement to fuel displacement. How much air the engine takes in affects how much fuel it can burn.
Fire does not burn, its whatever if fueling the fire that burns. For example, wood is a fuel that burns, and fire is the result. The speed at which a fuel burns, depends on the fuel. i.e. Wood burns much slower than gasoline.
In general, fire requires oxygen levels of at least 16% to sustain combustion. Below this threshold, a fire will not be able to burn efficiently, and may eventually extinguish due to lack of oxygen. However, the exact amount of oxygen needed can vary depending on the type of fuel and the conditions present.
How much fuel will be needed in a rocket will depend on the size of the rocket and where it is going. A rocket that will be traveling into space burns a lot of fuel and will need enough to keep it in orbit for teh desired time.