🏷️ Basic Information Identification Make: Porsche Model: 944 Turbo Production Years Covered: 1985, 1986, 1987, 1988, 1989, 1990, 1991 Codes Model Code: 944 Turbo (often referred to internally and in documentation) 👋 Introduction Market Position Category: Performance Grand Tourer / Sports Car Target Audience: Enthusiasts, owners, independent mechanics, technicians specializing in Porsche. Competitive Analysis Era Competitors: Lotus Esprit Turbo, Ferrari 328 GTB, Chevrolet Corvette C4, Nissan 300ZX Twin Turbo, Toyota Supra Turbo. Key Features Performance Focus: Emphasis on turbocharged performance and handling derived from motorsport heritage. Design Philosophy: Transaxle layout for balanced weight distribution, robust engineering, driver-focused cockpit. 📋 Manual Details Coverage Areas Vehicle Coverage: Porsche 944 Turbo models from 1985 to 1991 Page Count Estimated Pages: Hundreds to thousands (printable at great quality) Manual Type Type: Technical Specifications / Service Manual Language Language: English Format File Format: PDF Delivery Method: Instant Download Software Requirements: Adobe PDF Reader, WinZip (for larger files) 📖 Manual Coverage Systems Covered Engine: Detailed specifications, maintenance, diagnostics for the M44.50/M44.51 2.5L inline-4 turbo engine. Fuel System: Fuel injection system (Bosch Motronic), fuel pump, injectors, fuel pressure regulator specifications. Ignition System: Ignition timing, spark plugs, coil specifications, distributor (if applicable). Cooling System: Radiator, fan, thermostat, coolant specifications, capacities, pressure testing. Lubrication System: Oil type, viscosity, capacity, oil filter part numbers, oil cooler. Transmission: Manual transmission (G30/G30-20) specifications, clutch, shift linkage, fluid type and capacity. Drivetrain: Rear-wheel drive, limited-slip differential (LSD) specifications and service. Suspension: Front and rear suspension geometry, component specifications, alignment data, shock absorber/strut information. Brakes: Front and rear brake system specifications, disc sizes, pad types, hydraulic system details, ABS (if equipped). Steering: Power steering system specifications, fluid type, steering rack and linkage. Electrical System: Wiring diagrams, fuse box layout, component testing, battery, alternator, starter motor specifications. Body And Chassis: Body dimensions, chassis construction, door/hood/trunk mechanisms, aerodynamics. HVAC: Air conditioning and heater system operation, controls, components. Procedures Included Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection/replacement. Troubleshooting: Diagnostic procedures for common issues related to engine, fuel, ignition, electrical systems. Repair: Detailed instructions for component removal, installation, and repair across various systems. Adjustments: Engine idle speed, throttle linkage, parking brake adjustment. Torque Specifications: Torque values for critical fasteners across all major components. Technical Depth Depth: Comprehensive technical data, mirroring original manufacturer specifications. Diagnostic Level: Advanced diagnostics and troubleshooting for complex issues. Rebuild Procedures: Likely includes specifications and guidance for major component overhauls (engine, transmission, differential). 📊 Manual Specifications File Format Quality: High quality, printable pages Searchability: PDF format typically allows for text searching if OCR is applied. Print Quality Printability: Designed to be printable at great quality. Binding Type Binding: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Code: M44.50 (1985-1987), M44.51 (1988-1991) Configuration: Inline 4-cylinder, DOHC, 16 valves Displacement: 2.5 Liters (2479 cc) Bore X Stroke: 104.0 mm x 72.7 mm Compression Ratio: 8.5:1 Boost Pressure: 1.0 bar (14.5 psi) nominal (with overboost function on some models) Performance Horsepower: 217 hp (162 kW) @ 6000 rpm (US spec) Torque: 245 lb-ft (332 Nm) @ 3500 rpm (US spec) Fuel System Fuel Delivery: Bosch LE-Jetronic fuel injection with turbocharging Recommended Fuel: Premium Unleaded (91 Octane or higher) Fuel Pump Type: In-tank electric fuel pump 🔧 Transmission Standard Type: 5-speed manual transaxle (G30/G30-20) Optional Type: None (944 Turbo was exclusively manual) Features Gear Ratios: Specific gear ratios for each gear, reverse, and final drive (detailed in manual). Fluid Type: Hypoid gear oil, SAE 75W/90 or 80W/90 (API GL-4 or GL-5) Clutch: Single dry plate, hydraulic actuation 📐 Dimensions Exterior Length: 4206 mm (165.6 in) Width: 1735 mm (68.3 in) Height: 1275 mm (50.2 in) Wheelbase: 2499 mm (98.4 in) Front Track: 1458 mm (57.4 in) Rear Track: 1432 mm (56.4 in) Weights Curb Weight: Approximately 1360 kg (2998 lbs) Gross Weight Rating: Not prominently specified, but typical for class. Weight Distribution: Close to 50/50 due to transaxle layout. Towing Capacity: Not applicable or recommended for this vehicle type. Cargo Cargo Volume: Rear hatchback storage, plus front 'frunk' storage. 🛡️ Safety Features Ratings Crash Test Results: No formal ratings like modern NHTSA/IIHS due to era, but designed with robust safety cage. Active Features ABS: Anti-lock Braking System (ABS) available on some models and years. Passive Features Airbags: Driver airbag standard from 1987 onwards (check specific year). Seat Belts: Three-point seatbelts with pretensioners. Structural: Reinforced A-pillars, impact-absorbing foam in doors, strong chassis structure. Lighting: Halogen headlights, integrated fog lamps (often optional/standard depending on market). 💡 Technology Features Infotainment Audio System: Factory Blaupunkt or Porsche branded audio systems, often with cassette player; potential for upgrades. Driver Assistance ABS: As mentioned, ABS was an option on later models. Cruise Control: Available as an option on many models. Connectivity Connectivity Features: None in the modern sense; primarily focused...