In post #78, the example of the larger piston, more force on the crank......is not correct, for the same cubic inches.
[1] If two engines have the same cubes, say 400, & 10:1 CR, then the combustion chamber volume is the same for both, 5.6 cu in.
[2] Bore & strokes can be different. The engine with the bigger piston has the expanding force of the burning mixture spread over a larger area,
so less force per sq in with the bigger piston. The engine with the smaller piston has the force concentrated over a smaller area, so more force per sq in.
[3] If the 'big piston' theory in post #78 was correct, nobody would use a small bore/long stroke combo.
[4] Finally, if you take a 400 Pontiac with a 4.120" bore & 3.75" stroke. And a 400 Chev 4.125" bore, 3.75"stroke. Both have the same stroke but the Chev has a shorter rod. This means that the Chev piston is higher in the bore when the rod is at 90* to the crank throw where it gets maximum mechanical advantage. Since it is higher in the bore, it is seeing greater force from the expanding gas than the long rod engine, all else being equal.
[5] There is a reason that stroker engines perform so well...