Upping the compression part 1 of 4

Making the chamber area as small as possible is key to raising compression this is evident when looking at the shape of this crown, by raising up the piston crown in manufacture goes a long way to this, but is far from everything. Certain limits such as the Piston to Head clearance often referred to as squish is there for the changing environment such as heat causing expansion, but also rod stretch, yes the faster the engine revs the longer the connecting rods become, on this particular ZX10R engine Kawasaki calculated the rod stretch at 13000 RPM you need to have first hand experience in exactly how much you dare to reduce squish by this engine is at 0.4mm i know i cannot take any more as the first engine of this build type had piston to head contact at 0.35 & 14000 RPM.

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