I actually programmed a CNC machine to cut the bores on the GM train blocks!!
You want big HP?? Here it is!! Here are the specs of the 14 cylinder version:
Total engine weight: 2300 tons (The crankshaft alone weighs 300 tons.)
Length: 89 feet
Height: 44 feet
Maximum power: 108,920 hp at 102 rpm
Maximum torque: 5,608,312 lb/ft at 102rpm

