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The newly updated 2nd version covers every model Subaru WRX up to the current GD chassis (Version VII) including the North American version.
A must for every WRX owner!
1 Preface By Trevor Haines 2 Foreword by Paul Debelak 3 Introduction By Brett Middleton. 4 Disclaimer5 Measurement and Price Conversions 5.1 Fuel Rating 5.2 Measures 5.3 Prices 6 Why this Book was Written 6.1 The Approach 6.2 Reality Check 6.3 A Word on Dynamometers 7 WRX Model History 7.1 Version I � MY93 7.2 Version II � MY94-96 7.3 Version III � MY97 7.4 Version IV � MY98 7.5 Version V � MY99 7.6 Version VI � MY00 7.7 Version VII � MY01 (MY02 in USA) 7.8 Version VIII(?) � MY02 (MY03 in USA!) 8 Maintenance 8.1 Maintenance Checks 8.2 Extreme Operating Conditions 9 Suspension 9.1 Standard WRX Suspension Overview 9.2 Suspension Components and their Purpose 9.3 Establish your Goals 9.4 Project REX & Project REX II 9.5 Basic Suspension Modifications 9.5.1 Wheel Alignment 9.5.2 Stabilizer Bars 9.5.3 Sway Bar Links 9.5.4 Anti-Lift Kit 9.6 Serious Suspension Modifications 9.6.1 Camber Adjusters Or Adjustable Strut Tops 9.6.2 Adjustable Rear control arms 9.6.3 Springs 9.6.4 Shock Absorbers 9.6.5 Chassis bracing 10 Stopping the WRX 10.1 How The Brakes Work. 10.2 Improvements In Braking Performance 10.2.1 Brake Pads 10.2.2 Brake Fluid 10.2.3 Brake Discs 10.2.4 Brake Hoses 10.2.5 Replacing Brakes 11 Air Intake and Exhaust 11.1 Things To Look For In a Performance Exhaust 11.2 Air Intake 11.2.1 Resonator-ectomy 11.2.2 Pods and Cold Air Ducts 12 Engine Management 12.1 Diagnosis and Re-Set of the Version I to VI ECU 12.2 Diagnosis and Re-Set of the Version VII ECU 12.3 Engine Management Improvements 12.3.1 Chip Upgrades 12.3.2 Supplementary Controllers 12.3.3 Replacement ECUs 13 The Turbocharger 13.1 Turbocharger Problems 13.1.1 Inlet Air Temperatures 13.1.2 Turbo Lag 13.1.3 Boost Control 13.1.4 Thermal Management 13.1.5 Detonation And Other Problems 13.2 Options 13.2.1 Turbo Tuning Options for MY97 and Later Models. 13.2.2 Turbo Tuning Options for MY96 and Earlier Models. 14 The Intercooler and Blow Off Valves 14.1 Intercooler Improvements 14.1.1 Intercooler Water Spray 14.1.2 Replacement Intercooler 14.1.3 Front Mount Intercooler 14.2 Blow Off Valves 14.3 Water Injection 15 Engine Tuning 15.1 Overview of the Subaru WRX EJ20 Engine 15.1.1 Subaru WRX Engine 94-96 15.1.2 Subaru WRX Engine 97-98 15.1.3 Subaru WRX 99 � 00 Engine 15.1.4 Subaru WRX 01 � To Date Engine 15.2 Under Drive Pulleys 15.3 Internal Engine Re-Builds 15.3.1 Cylinder Block 15.3.2 Crankshafts 15.3.3 High Strength Conrods 15.3.4 Pistons 15.3.5 Cylinder Heads 15.3.6 Camshafts 15.3.7 Stroker Kits 15.3.8 Competition Sump 15.3.9 Fuel System Upgrades 15.3.10 Running In 15.3.11 A �War Story� 16 Drivetrain 16.1 Flywheel 16.1.1 Flywheel Improvements 16.2 Clutch 16.2.1 Clutch Improvements 16.3 Gearbox 16.3.1 Evolution of the WRX Gearbox 16.3.2 Why Your Gearbox Broke 16.3.3 Improving the WRX Gearbox 16.4 Differentials 16.4.1 Centre Differential 16.4.2 Rear Differential 16.4.3 Front Differential 16.4.4 Improvements to the Differential System 17 Wheels and Tyres 17.1 Rims 17.1.1 Rim Design and Cleaning 17.2 Tyres 17.2.1 Speed Rating 17.2.2 Tyre Pressures 17.2.3 Tyre Replacement 18 The Interior and Miscellaneous Improvements 18.1 Instruments 18.1.1 War Story 18.2 Turbo Timers 18.3 HVAC 18.4 Seats 18.5 ICE 18.6 Alarms and Other Theft Protection 18.7 Driving Lights and Spotlight Covers 18.8 Wings, Spoilers and other Attention-Getting Devices 19 Track Days 19.1 A Track Addict Speaks 19.2 Preparing your car for the track 19.2.1 Legal Minimum 19.2.2 Proper Track Modifications 19.2.3 Track Racing Maintenance Requirements 20 Glossary 21 Appendix I Transmission Data 21.1 Version I To VI 21.1.1 GC Sedan 21.1.2 GC Wagon 21.1.3 GC Two Door Coupe 21.2 Version VII On 21.2.1 GD Sedan 21.2.2 GD Wagon 22 Appendix II Chassis Code Nomenclature 22.1 Version I to VI 22.2 Version VII On 23 Appendix III MRT Gearbox Ratio Comparison Charts