Once the spill port is covered is when the injection event begins (there is a delay, but we won't concern ourselves with that), install the dial indicator and note its reading. Turn the pump counter clockwise until you are on the base circle. Note that as well. This is zero lift of the plunger. Bring it back to were port closure happens. If you installed the pump at this point, it would have 0 degrees advance or retard. With your degree wheel, advance it half or one degree at a time, and record the plunger lift. Do this for as many increments as you desire. Keep in mind that rotation to plunger lift will not necessarily be linear, it will slow down and stop towards the top of the cam, but unless you're running a lot of timing or its a really aggressive profile, you likely won't run into this.