what is a squish
Squish is an effect in internal combustion engines which creates sudden turbulence of the fuel/air mixture as the piston approaches top dead centre (TDC).In an engine designed to use the squish effect, at top dead centre (TDC) the piston crown comes very close, (typically less than 1mm), to the cylinder head.quish is an effect in internal combustion engines which creates sudden turbulence of the fuel/air mixture as the piston approaches top dead centre (TDC).