Quote:
Originally Posted by abently
This is assuming that the owner knows the exact flow rate of their injectors, otherwise there will always be two variables, i.e. the injector delay and flow rate, correct?
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There will always be two variables whether you know the exact flow rate or not. The injector delay time is fixed - it doesn't change with engine RPM or load. As such, at low load (short injector pulses) the delay time represents a relatively large portion of the injector electrical signal. Under high load (long injector pulses) the delay time represents a much smaller portion of the electrical signal. If you try to find the flow rate without accounting for the delay time, it will look like the injectors' flow rate changes with load, rather than just the pulse length.
The only way you can get around the delay time issue is to use injectors that open instantaneously. Since that's not possible due to the laws of physics (even if the valve could open that fast, the fuel itself still has inertia), you will always have that delay. You could possibly
minimize the delay to the point of it having no measurable effect on accuracy by using some kind of special injectors, however it would still be there.