There is no room for a 3" downpipe to get down on the side of the engine if you mount a turbo on the airbox place.
Best is 1-2 turbos behind the engine like RS6 (I have an RS6 engine in my S8-97)
A friend to me have a rear mounted turbo on his Audi A8-95 but with the high comp ratio in the stock A8 engine he can only have about 0.4bar/6psi of boost with gasoline.
__________________
Owns at the moment: 
S8-97 biturbo = RS8 My new trackday car 
A8-94, A8-96, A6 1.8tq -2004
2 Urquattro 20v-90 one red, one blue,
and one old Urquattro ex rallycar,
and some other cars.. 
|