🏷️ Basic Information Identification Make: Porsche Model: 944 Turbo Model Designation: 944 S2 Turbo / Turbo S Chassis Code: 951 Generation Generation Code: G29 (Facelift) Codes Engine Code Prefix: M44.50 (Turbo), M44.52 (Turbo S) 👋 Introduction Market Position Market Segment: Performance Sports Coupe Competitive Analysis Competitors Era: Chevrolet Corvette (C4), Nissan 300ZX (Z31), Toyota Supra (MkIII), BMW M3 (E30), Ferrari 308/328 GTB Key Features Vehicle Philosophy: Transaxle layout, balanced weight distribution, turbocharged performance, advanced engineering for its era. Manual Value Proposition Diy Benefit: Enables independent maintenance and repair, saving significant costs compared to dealership service. Knowledge Transfer: Provides in-depth understanding of complex Porsche engineering, empowering owners with technical insight. Accessibility: Digital format allows for quick access and on-the-go reference, ideal for roadside diagnostics or workshop use. 📋 Manual Details Coverage Areas Covered Years: 1987, 1988, 1989, 1990, 1991 Page Count Estimated Page Count: Extensive (typically 1000+ pages for complete factory manuals, this download compilation is comprehensive) Manual Type Type: Comprehensive Service and Repair Manual (Downloadable) Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Management: Fuel Injection (Bosch Motronic M3.1), Ignition, Engine Control Unit (ECU) Engine Mechanical: Disassembly, Reassembly, Component Specifications, Cylinder Head, Block, Crankshaft, Pistons, Connecting Rods, Valves Turbocharging: Turbocharger, Intercooler, Wastegate, Boost Control Transmission: Manual (G50/00), Clutch, Gearbox Overhaul, Differential Braking System: Hydraulic System, ABS (Anti-lock Braking System), Disc Brakes, Calipers, Master Cylinder Suspension And Steering: Front and Rear Suspension, Shock Absorbers, Springs, Bushings, Power Steering System Electrical System: Wiring Diagrams, Battery, Alternator, Starter, Lighting, Fuses, Relays, Instrumentation Body And Chassis: Body Panels, Doors, Hood, Trunk, Interior Trim, Chassis Components Cooling System: Radiator, Fan, Hoses, Thermostat, Coolant Fuel System: Fuel Tank, Fuel Pump, Fuel Lines, Fuel Filter, Injectors Emission Control: Catalytic Converter, EGR System (if applicable), Emission Components Restraint System: Seat Belts, Airbags (if equipped, though unlikely for early 944 Turbos) Chassis Body: Frame and body structure, doors, windows, locks, bumpers, exterior trim, interior trim, seats. Axle And Driveshaft: Rear axle assembly, CV joints, driveshaft, U-joints. Procedures Included Maintenance: Routine Checks, Oil Changes, Filter Replacements, Fluid Checks, Belt Tensioning Troubleshooting: Diagnostic Flowcharts, Symptom-Based Problem Solving, Common Faults and Fixes Repair: Step-by-Step Repair Instructions for all major systems Rebuilds: Engine, Transmission, Turbocharger Rebuild Procedures Diagnostics: Diagnostic Trouble Codes (DTCs), Sensor Testing, Actuator Testing Adjustment: Valve Clearance Adjustment, Idle Speed Control, Turbo Boost Control Lubrication: Periodic lubrication points and specifications for chassis components. Technical Depth Depth: Comprehensive from basic maintenance to advanced engine and transmission rebuilds, including electrical diagnostics and wiring schematics. 📊 Manual Specifications File Format File Type: PDF Print Quality Quality: Digital Download (Quality dependent on source scan, generally good for clarity) Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) Software Requirements Reader Requirements: Adobe PDF Reader Compression Requirements: WinZip or equivalent for compressed files Operating Systems Compatibility: All versions of Windows & Mac ⚙️ Engine Specifications Primary Engine Engine Type: Inline-4, DOHC, 16 Valves Displacement: 2.5 Liters (2479 cc) Bore X Stroke: 104.0 mm x 73.0 mm Compression Ratio: 8.5:1 (Turbo), 9.0:1 (Turbo S) Horsepower Hp: 217 hp @ 5500 rpm (Turbo), 247 hp @ 5500 rpm (Turbo S) Torque Lb Ft: 245 lb-ft @ 3500 rpm (Turbo), 258 lb-ft @ 4000 rpm (Turbo S) Performance 0 60 Mph Seconds: Approx. 6.0 - 6.5 seconds Top Speed Mph: Approx. 150-155 mph Fuel System Injection System: Bosch Motronic M3.1 Electronic Fuel Injection Fuel Type: Premium Unleaded Gasoline (91+ Octane) Turbocharging Turbocharger Model: Garrett AiResearch T03/04B Boost Pressure: 1.1 bar (16 psi) with manual boost control (Turbo S typically had adjustable boost) 🔧 Transmission Standard Type: 5-Speed Manual (G50/00 transaxle) Features Layout: Transaxle (Engine and transmission in rear-biased configuration) Clutch Type: Hydraulically Actuated Single Dry Plate Clutch 📐 Dimensions Exterior Length: 4215 mm (165.9 in) Width: 1735 mm (68.3 in) Height: 1275 mm (50.2 in) Wheelbase: 2450 mm (96.5 in) Weights Curb Weight: Approx. 1360 kg (2998 lbs) Gross Weight Rating: Approx. 1800 kg (3968 lbs) 🛡️ Safety Features Ratings Crash Test Ratings: Not extensively rated by modern standards, but known for robust build quality and good occupant protection for its era. Focus on chassis integrity. Active Features ABS: Standard (Bosch ABS III) Passive Features Airbags: Driver Airbag (Standard on later models, optional/absent on very early '87 cars). Seat Belts: 3-Point Inertial Reel Seat Belts Rollover Protection: Reinforced A-pillars and Targa roof structure provide significant rollover protection. 💡 Technology Features Infotainment Audio System: Factory AM/FM Cassette player with optional CD changer. Typically 8-speaker premium sound system. Driver Assistance Cruise Control: Standard Connectivity Bluetooth: Not available (aftermarket solutions exist). 🔧 Maintenance Service Intervals Oil Change: Every 5,000 - 7,500 miles or annually. Use high-quality synthetic oil. Timing Belt Replacement: Every 45,000 miles or 4-5 years (critical maintenance item due to interference engine design). Spark Plugs: Inspect at 15,000 miles, replace as needed...