Audi V8 User Manual

29
Effect of variable intake manifold on torque
The illustration explains the correlation
between the length/cross section of the
intake manifold and engine speed and shows
the characteristic torque curve produced by
the 3 stages.
SSP217_035
Lower full throttle (stage 1)
Middle full throttle (stage 2)
Upper full throttle (stage 3)
Since the maximum torque across the speed
range depends primarily on the length and
cross section of the intake manifold, the new
three-stage variable intake manifold comes
closest to producing the optimum characteri-
stic torque curve across the speed range.
Depending on the engine speed, appropriate
“resonance tube lengths“ are available for the
lower, middle and upper speed range.
200
500
400
300
0 1500 3000
3360 5200
4500 6000 7500
Speed
Torque

Audi V8 Specifications

General

Configuration Type	V8
Aspiration	Naturally Aspirated
Displacement	3562 cm3
Power	184 KW
Torque	340 Nm
Fuel System	Fuel injection
Configuration	V
Displacement Range	3.6
Cylinder Bore	81 mm
Stroke	86.4 mm
Valvetrain	DOHC
Torque Output	251 lb-ft