This comprehensive 56-page PDF file contains the official VAG Self-Study Program (released as SSP 437 in Europe and 925803 in North America) focused entirely on the design and function of the supercharged Audi 3.0-liter V6 TFSI engine. First introduced in the 2009 Audi A6 (and famously used in the S4, S5, and Q7), this powerplant marked a significant shift for Audi by utilizing a belt-driven mechanical Roots blower instead of their traditional exhaust-driven turbochargers. This guide is an absolute must-have for mechanics, performance tuners, and Audi enthusiasts who want to deeply understand the engineering behind this incredibly responsive and highly tunable “supercharged” TFSI engine.
Please note: As a Self-Study Program, this document focuses on engineering design, mechanical upgrades from the base engine, and operational theory. It is not a step-by-step repair or workshop manual, though the theoretical knowledge it provides is invaluable for complex diagnostics and modifying the supercharger system.
The manual covers the following key engineering topics in detail:
- Engine Architecture and Modifications: A detailed look at how Audi adapted their existing 3.2L FSI V6 for forced induction. It details the specific heat treatments applied to the cylinder block, the strengthened crankshaft and connecting rods, and the modified camshafts and valves required to handle the increased cylinder pressures.
- The Roots Blower Supercharger Module: The heart of the 3.0T’s performance. It provides a complete breakdown of the supercharger, which sits compactly inside the 90-degree “V” in place of a traditional intake manifold. It explains the operation of the four-vane rotary pistons spinning at up to 23,000 rpm, capable of producing 0.8 bar of boost.
- Cooling Systems and Intercooling: Essential details on managing intake temperatures. It meticulously explains the dual water-to-air intercoolers integrated directly into the supercharger housing, and the separate, dedicated low-temperature coolant circuit required to keep the charge air dense and oxygen-rich.
- Engine Management and Fuel Injection: A comprehensive overview of the Simos 8 engine management system. It explains the high-pressure common rail fuel system capable of 150 bar of pressure and multiple injections per cycle, which cools the combustion chamber to prevent knock under boost (despite a high 10.5:1 compression ratio).
- Emissions and Ancillary Systems: Detailed explanations of the secondary air injection system required to meet strict Euro 5 and ULEV II emissions standards, as well as the layout of the complex dual-belt drive system required to spin the supercharger.
Whether you are diagnosing a supercharger bypass valve fault, upgrading the heat exchanger for track use, or simply want to understand why this engine produces peak torque at just 2,500 rpm, this Self-Study Program is the definitive technical resource.
CONTENTS
- Introduction
- Engine Mechanical
- Oil Supply
- Air Supply
- Cooling System
- Exhaust Emission Treatment
- Fuel System
- Engine Management
- Service
- Glossary
- Summary
Language: English
Format: PDF
Pages: 58
Self Study Program 925803 – Audi 3.0 V6 TFSI engine with Roots blower PDF free online
