This 2001 report covers a detailed design benchmarking study of the BMW S50 B32 3.2L gasoline engine and includes a photographic record of all the main components, plus individual masses and dimensions. Ricardo comments on specific design features are also included.
The BMW S50 B32 engine was designed specifically to improve the performance of the second generation M3 vehicle first introduced back in 1992. This vehicle was powered by a normally aspirated straight six with a capacity of 2.99 litres, which developed 282bhp at 7000rpm.
The M3 EVO model, introduced in 1996 uses the same base engine architecture but capacity is increased to 3.20 litres through an increase in bore from 86.0 to 86.4mm and an increase in stroke from 85.8 to 91.0mm. The compression ratio is increased to 11.3:1 over the original 10.8:1.
This engine has a maximum power of 239kW (325hp) at 7400rpm and a maximum torque of 350Nm at 3250rpm.
- Cylinder Block, Cylinders, Crankcase and Main Bearing Structure
- Connecting Rod, Bearings
- Piston, Pin and Rings, Cylinder Head and Ports
- Camshafts, Valve Train and Cam Cover
- Inlet, Exhaust and Emission Control System