How about this?
I'm sure most that have access to a scope know this but if you didn't, here you go.
This is a Pico scope hooked to an injector wire using a low amp current probe.
You see zero current on the left and then when the injector is switched on it begins to ramp up. I placed the first marker here.
Notice the bump in the ramp. This is where the pintle moves and changes the flow of current slightly.
The straight down drop is when the injector is turned off.
The box in the top of the screen is showing where I placed the markers. The first marker to the second is 1.389 ms. I am unclear on if the first "dip" or the second (which I have marked) is actual dead time. Could be some where in between? I highly doubt the injector is flowing "fully" at the first dip as the pintle has just begun to move.
Total "on time" here is about 2.8ms. (Idle)
This is just a stock 265cc/hr 1.8L injector at stock fuel pressure.
I know everyone doesn't have a oscilloscope at their disposal, but if you do, check it out. I wonder how this compairs to the other method described in this thread.