The engine was based on an existing block, but Ford engineers fitted it with high flow rate " GT40 " heads and used hypereutectic pistons to increase response, output and durability.
12.
However, at a blend of 25 % silicon there is a significant reduction of strength in the metal, so hypereutectic pistons commonly use a level of silicon between 16 % and 19 %.
13.
These pistons can survive mild detonation with less damage than stock pistons . 4032 and hypereutectic alloys have a low coefficient of thermal expansion, allowing tighter piston to cylinder bore fit at assembly temperature.
14.
The "'LU2 "'used unique hypereutectic, strutless pistons and a more aggressive camshaft . Like the LB4, the LU2 used throttle-body fuel injection, but was rated at and of torque.
15.
Among the modifications, the engine block and heads were modified to enhance coolant flow, the crankshaft was upgraded to a fully counter weighted forged unit, the billet roller cam had a unique profile, and the pistons were made of a stronger hypereutectic alloy.
16.
This means that it expands less than a piston with no silicon, but since the silicon is fully alloyed on a molecular level ( eutectic ), the alloy is less brittle and more flexible than a stock hypereutectic " smog " ( low compression ) piston.
