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Hi, my name is Charlie and I'm building this engine. To increase the compression ratio I will make the pistons slightly bigger in diameter but also add a flat crown to the working piston, the one on the right, leaving just 1mm clearance to the opposing piston. Importantly, I will mill a one...

hi my name is Charlie and I'm building the differential engine. To increase the compression ratio I will make the piston a bit bigger but on the "working" piston I will give the piston a flat crown leaving just 1mm clearance to the opposing one but, and this important, I will carve away an area...