I know the calculation has something to do with the injector pulse width and some other number. I need to find out if I'm maxing out my injectors or not. Thanks in advance.

Time on vs available time.

Injectors fire every four ignition pulses (I'm pretty sure of that) or once every engine revolution.

So at 600 RPMs, or 10 revolutions per second, the injectors fires every 100 milliseconds. If the pulse width is 2 milliseconds, then you have 2% duty cycle (2/100).

At 3000 RPMs, or 50 revolutions per second, the injectors fires every 20 milliseconds. If the pulse width is 5 milliseconds, then you have 25% duty cycle (5/20).

At 6000 RPMs, or 100 revolutions per second, the injectors fires every 10 milliseconds. If the pulse width is 9 milliseconds, then you have 90% duty cycle (9/10).

Most injectors with max flow at 80-90% duty cycle, especially at higher RPMs.