Mild 383 build

273,
This is for you. I know from your posts that you are quite knowledgeable. Not wasting time with Turk, he doesn't know how an air bleed works.

You are confusing force with pressure [ loading ]. Look at the formula in post #112. Pressure= force divided by area [ not multiplied ].
In post #91, you said energy can neither be created or destroyed. 100% correct
In post #114, you used an example of 1000 lbs of force in the com chamber. Let's work with that.
Two engines both 400 cu in, one has a 4" piston, other has 5"piston; both have 10:1 CR, so same chamber volume, both produce 1000 lb of force.
4" piston has an area of 12.6 cu in, so pressure is 80 lb/per sq in in all directions including piston crown. The 5" piston has an area of 19.6 sq in. According to your theory [ wrong ], the same 80 lb per sq in is exerted on the larger piston......which means the original force would need to be....1570 lbs of force.....not 1000.
So an extra 570 lbs of force has come...from nowhere?
The correct answer as I have said all along is that the pressure loading on the 5" piston is lower....& then all the laws of high school physics are obeyed.