Intake Manifold

DESCRIPTION





Fig. 8

The composite upper intake manifold is a crossflow type with long runners to improve air charge inertia (Fig. 8). An active Short Runner Valve (SRV) opens during certain operating conditions to improve top end performance. A Manifold Tuning Valve (MTV) connects the plenums at specific engine speeds to maximize low RPM torque without reducing high RPM power.





Fig. 9

The aluminum lower intake manifold attaches to each cylinder head and uses a gasket for sealing (Fig. 9). The manifold coolant passage allows coolant to flow between cylinder heads. An attached steel tube, allows coolant flow to the heater