2.7 biturbo

["Julio C Negron" <elprofe@isla.net>]

hi Audifan!!!
today we touch the turbo charging on S4!!!
But first...Air ducting
Fresh air is induce by the combined air filter and air mass meter and
distrubuted to the exhaust gas turbochargers by the air distributor...
The air distributor is made of plstic..
advantage
* lower weight
*The intake air is heated to a lesser degree by the engine...
The air which is compressed and thus heated by exhaut gas turbocharger is
fed the charge air coolers..
Cooling air intakes in the bumper and the air vent in the wheel housing
liner ensures that a sufficient amount of air flows throws the charge air
coolers....
Advantage...
Cooled air has a higher density and this means improved volumetric
efficiency
The lower temperature reduceses knock tendency also...
The compressed air streams then converge upstream of the throttle valve
control part and distributed to the individual cylinders in the intake
manifold.