Will, I'd like to see what kind of gauge you plan to use. An engine running at 2,000 RPM is getting 1,000 power strokes in a 60-second time frame. That's nearly 17 times per second. What sort of reading do you expect a mechanical device like a Bourdon-tube pressure gauge to give? It might be possible to mount a piezo-electric crystal in the combustion chamber and monitor the electrical signal it generates with a computer operating at a sufficiently high frequency to graph some sort of pressure curve, but where in the power stroke do you intend to take your pressure reading? The majority of the usable power is developed in the first inch of piston travel after top dead center. Beyond that point, the acceleration of the piston is running away from the pressure impulse, and the thrust transmitted to the crankshaft and the corresponding cylinder pressure is diminishing.
With a sufficiently sophisticated set of mathematic formulas and a powerful computer, it might be possible to produce a set of hypothetical pressure figures. The burning question would be WHY BOTHER?
Jerry