4.6. Pressure In test-bed exhaust extraction duct (see note 1 to Table 1)
4.7. Pressure in inlet manifold: ± 0 75 mbar. ... When the complete exhaust system is used in the test laboratory, the exhaust extraction system must not, with the engine in operation, create in the exhaust extraction duct, at the point where it is connected with the exhaust system of the vehicle, a pressure differing from the atmospheric pressure by more than 10 mbar ...
