Fuel System

Introduction

Air is supplied to the supercharger by an intake cleaner/duct, throttle assembly and induction elbow which are similar to those used for normally aspirated engines. The supercharger delivers pressurized air to two separate charge air cooler units, each unit being mounted on the cylinder bank which it supplies. Pressurized cooled air is fed from the charge air coolers directly into each inlet port.

At closed or partial throttle positions, a by-pass valve opens to direct airflow from the supercharger outlet to its inlet. This effectively inhibits the pressurized charge to the cylinders, reducing engine torque to non supercharged levels. The charge air coolers are water cooled by a radiator and coolant pump.

Circuit Diagram, Fuel Injection System - SC Engine:

Circuit references to injectors:
'A' refers to bank 1.
'B' refers to bank 2.

Charge Air Cooler Adaptors
The charge air cooler adaptors:
provide the interface between the charge air coolers and the cylinder heads
locate the fuel rails and injectors
For removal and installation; Service and Repair

Fuel Rails
The plastic fuel rails locate in the charge air cooler adaptors:
Bank 2 fuel rail has the fuel feed pipe attached at the rear of the engine and the fuel cross-over pipe at the front
Bank 1 fuel rail connects to the other side of the cross-over pipe at the front of the engine and the fuel return pipe/pressure regulator at the rear

Fuel Cross-over Pipe
The fuel cross-over pipe connects the fuel rails together but is not interchangeable between the normally aspirated engine and the supercharged version.