Hi folks taught you might be interested in this and dont know whether its on the forum, but im reading through Motec website and came accross this.
Rule of thumb for choosing Injector
Sizing
The amount of fuel injected is determined by the time the injector is open (controlled by the ECU) and the physical size of the internal passage ways inside the injector.
Injector sizing is commonly identified by stating the flow rate, which is the amount of fuel that flows through the injector when held fully open for one minute. Flow rates are usually quoted at 3 bar fuel pressure. Doubling the pressure increases the flow rate by approximately 30%, injector dependent.
Example: Through a 500 cc/min injector flows 500 cc (½ litre) of fuel per minute at 3 bar. This would increase to 650 cc/min at 6 bar.
What size will you need?
The engine power divided by the number of cylinders, gives you hp/cylinder.
As a rule of thumb you will need 5.5 cc fuel per hp.
For example a 600 hp eight cylinder engine requires an injector flow of at least
600/8 x 5.5 = 412 cc/min per injector.
Source is http://www.motec.com/fuel/injectors/
Rule of thumb for choosing Injector
Sizing
The amount of fuel injected is determined by the time the injector is open (controlled by the ECU) and the physical size of the internal passage ways inside the injector.
Injector sizing is commonly identified by stating the flow rate, which is the amount of fuel that flows through the injector when held fully open for one minute. Flow rates are usually quoted at 3 bar fuel pressure. Doubling the pressure increases the flow rate by approximately 30%, injector dependent.
Example: Through a 500 cc/min injector flows 500 cc (½ litre) of fuel per minute at 3 bar. This would increase to 650 cc/min at 6 bar.
What size will you need?
The engine power divided by the number of cylinders, gives you hp/cylinder.
As a rule of thumb you will need 5.5 cc fuel per hp.
For example a 600 hp eight cylinder engine requires an injector flow of at least
600/8 x 5.5 = 412 cc/min per injector.
Source is http://www.motec.com/fuel/injectors/
