Originally posted by southerner
different cam duration and stroke combinations to understand the relationship between cam and compression ratios and where you want the power in the egine rev range.

Static compression ratio, cam timing, flow capacities, rpm...etc are all components of cylinder pressure. The way these components are utilized in an engine combination determine the overall cylinder pressure of that engine and at what rpm peak cylinder pressure occurs. (Peak torque) An engine with 11-1 static compression ratio can easily have less cylinder pressure than an engine with 10-1 static compression ratio. Cam timing, particularly intake closing, has a large impact on cylinder pressure, but so does exhaust valve closing. Look into lobe separation and the effects it has on cam timing and cylinder pressure.

At the end of the day all these events relate directly to piston position/time, which of course are determined by the crankshaft stroke and connecting rod length.