Twin-scroll turbocharging
The new four-cylinder engines also feature twin-scroll turbocharging. This means that the exhaust stream from cylinders 1 and 4, and the exhaust stream from cylinders 2 and 3, follow separate spiral-shaped paths to the turbine wheel. This reduces exhaust back-pressure at low engine rpm, allowing the energy of the exhaust gas pulses to be utilised as efficiently as possible. The result is instant throttle response and fast-revving performance which BMW drivers can instantly translate into driving pleasure.
See also:
1998: the fourth generation - common rail direct injection, VALVETRONIC and
BMW xDrive
The fourth-generation BMW 3-Series was launched in May 1998 and brought with
it another hike in output, comfort and safety. The new model was four
centimetres (approx. 1.5 in.) longer and wider th ...
Three different drive modes
There are three different modes that the transmission works under: Drive,
Sport or Manual. Sport mode provides a more aggressive shifting, holding gears
longer and letting you stay in the engine's ...
DSC OFF
When DSC OFF, is active,
driving stability is limited during acceleration
and when driving in bends. ...