🏷️ Basic Information

Make:

Porsche

Model:

911 Turbo (930)

Model Code:

930

Product Type:

Complete Workshop Service Repair Manual

Product Format:

Downloadable Digital File

👋 Introduction

Vehicle Segment:

High-performance sports car, luxury grand tourer, homologation special.

Target Audience:

Enthusiasts, owners, independent repair shops specializing in classic Porsche vehicles.

Key Competitors Era:

Ferrari 512 BB/Testarossa, Lamborghini Countach, Chevrolet Corvette ZR-1 (later models), Aston Martin V8 Vantage.

Vehicle Reputation:

Iconic status, raw performance, unique driving experience, significant collectibility.

Manual Value Proposition:

Empowers owners to perform essential and complex maintenance and repairs, saving significant costs associated with specialized Porsche mechanics and preserving the vehicle's value.

📋 Manual Details

Applicable Years:

1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989

Model Variants Covered:

All 930 Turbo models, including variations in engine output, turbocharging systems, and body styles (e.g., Coupe, Targa, Cabriolet if applicable within the 930 generation).

Engine Variants Covered:

All engine types fitted to the 930 generation 911 Turbo, specifically the turbocharged flat-six engines.

Trim Levels Covered:

All trim levels and optional equipment packages for the 930 Turbo generation.

Transmission Types Covered:

All transmission types fitted to the 930 Turbo generation, primarily the G50 4-speed manual transmission for earlier models and the G50 5-speed manual transmission for later models.

Estimated Page Count:

High volume, likely exceeding 1000 pages considering the comprehensive nature of workshop manuals for this era and vehicle.

Manual Type:

Complete Workshop Service Repair Manual

Language:

English

File Format:

PDF (Portable Document Format)

File Accessibility:

Downloadable, printable, viewable on PC, Mac, tablets, smartphones.

Required Software:

Adobe Reader (or compatible PDF viewer)

📖 Manual Coverage

Engine Mechanical:

Engine removal/installation, cylinder head overhaul, piston and connecting rod service, crankshaft inspection and repair, valve train components, timing system, lubrication system, cooling system.

Engine Performance And Turbocharging:

Turbocharger system diagnosis and repair, intercooler system, wastegate operation, boost pressure control, fuel injection system (K-Jetronic), ignition system, emissions control systems.

Transmission And Drivetrain:

Manual transmission overhaul (G50), clutch service, differential service, axle shafts, driveshaft, hub assemblies.

Suspension And Steering:

Front and rear suspension component inspection and replacement (torsion bars, control arms, shock absorbers, sway bars), wheel bearing service, steering gear box overhaul, power steering system.

Brakes:

Brake system diagnosis and repair, hydraulic system components (master cylinder, brake lines, calipers, wheel cylinders), brake rotor and pad replacement, parking brake system, anti-lock braking system (ABS) if equipped on later models.

Electrical System:

Battery service, charging system (alternator), starting system (starter), lighting system (headlights, taillights, interior), instrumentation and gauges, wiring diagrams, fuse and relay identification and testing, power windows, mirrors, and seats.

Fuel System:

Fuel tank and pump service, fuel lines, fuel filter replacement, fuel accumulator, fuel pressure regulator, fuel distributor, injector service and testing (for K-Jetronic).

Body And Chassis:

Body panel removal and installation, door mechanisms, window glass replacement, interior trim, exterior trim, sealing components, structural integrity checks.

Heating And Air Conditioning:

HVAC system diagnosis and repair, refrigerant handling, compressor service, blower motor, heater core, air conditioning system components.

Maintenance:

Routine maintenance procedures, fluid level checks and changes, filter replacements (oil, air, fuel), spark plug replacement, belt inspection and tensioning.

Troubleshooting:

Diagnostic charts and procedures for identifying and resolving common problems across all vehicle systems.

Repair And Rebuild:

Detailed step-by-step instructions for component disassembly, repair, reassembly, and installation for virtually every part of the vehicle.

Technical Specifications:

Torque specifications, clearances, alignment data, electrical resistance values, pressure readings, and other critical technical data.

Diagrams And Illustrations:

Exploded views, schematic diagrams (electrical, vacuum, fuel), and photographic illustrations to aid in understanding procedures.

Depth Of Coverage:

Comprehensive (A-Z), covering everything from basic fluid changes to complete engine and transmission rebuilds, including complex electrical diagnostics and bodywork.

📊 Manual Specifications

File Quality:

High-resolution, ensuring clarity of text and images.

Searchability:

Likely text-searchable PDF for quick information retrieval.

Printable:

Fully printable, allowing users to create physical copies of specific sections or the entire manual.

Binding Type Digital:

N/A (Digital File)

Paper Type Digital:

N/A (Digital File)

⚙️ Engine Specifications

Engine Type:

Turbocharged Flat-Six (Air-Cooled)

Engine Code Family:

M30/M40 for early models, M44/M44/50 for later models (specific codes may vary by year and market).

Displacement Early:

3.0 Liters (2994 cc)

Displacement Mid:

3.3 Liters (3299 cc)

Bore X Stroke 3.0L:

95.0 mm x 70.4 mm

Bore X Stroke 3.3L:

97.0 mm x 74.4 mm

Horsepower 3.0L:

Approx. 260 PS (256 hp; 191 kW) at 5500 rpm (varies slightly by market and year).

Horsepower 3.3L:

Approx. 300 PS (296 hp; 221 kW) at 5500 rpm (standard), up to 330 PS (325 hp; 243 kW) for special variants like the M505 'Sonderwunsch' or later factory intercooled models.

Torque 3.0L:

Approx. 330 Nm (243 lb-ft) at 4000 rpm.

Torque 3.3L:

Approx. 412 Nm (304 lb-ft) at 4000 rpm (standard), up to 430 Nm (317 lb-ft) for intercooled versions.

Fuel Delivery:

Bosch K-Jetronic (CIS - Continuous Injection System) mechanical fuel injection with turbocharger integration.

Fuel Type:

Unleaded gasoline, minimum 98 RON (octane rating).

Ignition System:

Electronic ignition with distributor.

🔧 Transmission

Transmission Type:

4-Speed Manual (G50 for later models, but 930 was often associated with the earlier 4-speed transaxle before the 5-speed G50 became standard on 911s in general).

Transmission Code Early:

Often referred to as the '930' transmission (a specific reinforced variant of the 915 gearbox).

Optional Transmission:

None offered from the factory for the 930 Turbo.

Gear Ratios:

Specific gear ratios vary by year and model, but are designed for performance acceleration. Manual clutch operation is standard.

Transmission Fluid Spec:

Refer to manual for specific GL-4 or GL-5 gear oil, typically a high-quality synthetic. Capacities around 2.5-3.0 liters.

📐 Dimensions

Wheelbase:

Approx. 2270 mm (89.4 in)

Length:

Approx. 4210 mm (165.7 in)

Width:

Approx. 1720 mm (67.7 in) excluding mirrors.

Height:

Approx. 1310 mm (51.6 in)

Wheel Bolt Pattern:

5x130 mm

Wheel Size Standard:

Front: 7x16 ET23, Rear: 8x16 ET10.6 (common for early models, later models may differ).

Curb Weight:

Approx. 1350-1450 kg (2976-3197 lbs), depending on year and equipment.

Gross Vehicle Weight Rating:

Refer to VIN plate, typically around 1700 kg.

🛡️ Safety Features

Crash Test Ratings:

Not subject to modern crash test rating systems of NHTSA or Euro NCAP as it predates standardized testing methodologies for such vehicles. However, designed with robust structural integrity for its era.

Active Safety Features:

Powerful four-wheel disc brakes, rear-wheel steering effect from wide tires, limited-slip differential (LSD) on some models.

Passive Safety Features:

Reinforced chassis, crumple zones, three-point seatbelts, padded interior surfaces.

💡 Technology Features

Infotainment Systems:

Basic analog systems typical for the era: AM/FM radio, cassette player. Often an aftermarket head unit is present on surviving examples.

Driver Assistance Features:

Minimal to none by modern standards. Focus is on pure driving dynamics. Limited-slip differential (on some models) can be considered a performance-enhancing feature that aids traction.

Connectivity Features:

N/A (No factory connectivity options such as Bluetooth or USB).

🔧 Maintenance

Oil Change Interval:

Every 5,000 km (approx. 3,000 miles) or annually, whichever comes first. Due to age and performance, more frequent changes are recommended by enthusiasts.

Major Service Interval:

15,000 - 30,000 km (approx. 9,000 - 18,000 miles) for comprehensive checks, tune-ups, spark plug replacement, and inspection of critical components.

Engine Oil Type:

High-performance synthetic oil meeting Porsche specifications, typically SAE 15W-50 or 20W-50. Specific Porsche A40 or C40 approvals may apply for modern equivalents, but older spec oils are often used.

Engine Oil Capacity:

Approx. 10-12 liters (10.5-12.7 US quarts) with filter change.

Brake Fluid Type:

DOT 4 or DOT 5.1, high-performance racing fluid recommended for optimal performance and boiling point.

Coolant Type:

Air-cooled engine, no coolant needed for engine. Washer fluid for windshield.

Known Issues Common:

Oil leaks (especially from engine seals, pushrod tubes), turbocharger wear and failure, fuel system component degradation (lines, injectors, accumulator), potential for 'blow-through' exhaust leaks at the cylinder heads, ignition system issues, brake system leaks, suspension wear, clutch wear, gearbox synchro wear.

Maintenance Considerations:

Due to its age and performance nature, regular proactive maintenance and inspection are critical to prevent catastrophic failures. Parts availability for some specific components can be challenging.

📚 Vehicle History

Porsche Heritage:

Porsche's lineage of producing high-performance, track-bred sports cars dating back to the 356 and the original 911. Known for engineering excellence, motorsport success, and distinctive design.

930 Development:

Developed primarily as a homologation special for Group 4 racing. It was the first 911 to feature a turbocharged engine from the factory, revolutionizing its performance and image. The 930 designation refers specifically to the turbocharged models, distinct from the naturally aspirated 911s of the same era.

Key Changes 930:

Introduction of the 3.0L turbo (1975), upgrade to 3.3L with intercooler (1978), significant drivetrain and chassis updates throughout its production run. Notably, it retained the 4-speed gearbox for much of its life, unlike later naturally aspirated 911s that adopted the 5-speed G50 transmission earlier.

Production Years:

1975-1989

Production Location:

Stuttgart, Germany

Total Production Numbers:

Approximately 2,480 units of the 3.0L and 15,000+ units of the 3.3L, totaling around 18,000 units over its lifespan. Exact numbers vary by source.

🏆 Awards & Recognition

Automotive Awards:

While not typically winning specific 'Car of the Year' awards in a modern sense, the Porsche 911 Turbo (930) is universally recognized as an automotive icon and a benchmark for performance cars of its era. It consistently receives accolades in classic car publications and collector communities for its engineering, styling, and driving experience.

Motorsport Legacy:

The 930's existence is rooted in motorsport homologation requirements, underscoring its performance credentials. Turbocharged Porsches have a rich racing history.