Exhaust system

[christofurr]

Ferrari F40, by Mark Hughes (Easily the best book I own).


..."Two Japanese water-cooled IHI RHB 53 LW Turbochargers (again, one system per bank) provide the turbocharging. The four-into-one exhause manifolds from each cylinder bank direct exhaust gases to the two turbines, which turn coaxially with centrifugal compressors. The compressed air is sent through two German Behr air-to-air heat exchangers, or intercoolers, in order that it's temperature is lowered before it reaches the inlet plenum chambers. Each of the two turbocharging systems supplies the opposite bank of cylinders; the left-hand compressor therefore, supplies the right-hand bank of cylinders, and vice versa. Lubrication and cooling for the turbochargers is incorporated into the engines main systems: the shaft linking the compressor and turbine is lubricated by engine iol under pressure, while the turbocharger bearing housing is cooled by the engine coolant. A single wastegate opens to bypass exhaust gases away from the turbines when boost pressure reaches 1.1bar, directing the excess instead through the central pipe of the three exhausts which emerge from the tail of the car"...


Sorry for the excess of text, but it makes more sense with some background information . I'm still confused about exactly what the role if the big, muffler-looking thing plays, and the book doesn't say anything about it in that section. I'll have a bit more of a read and see what I can find.