🏷️ Basic Information Identification Make: Acura Model: NSX Year: 1991 Chassis Code: NA1 Platform: First Generation NSX (NA1/NA2) 👋 Introduction Market Position Market Position: The 1991 Acura NSX represented a paradigm shift in supercar design and engineering, challenging established European benchmarks with its innovative all-aluminum construction, mid-engine layout, and driver-focused ergonomics. It was positioned as an accessible yet uncompromising exotic, appealing to discerning enthusiasts seeking exceptional performance without the extreme maintenance demands of its rivals. Competitive Analysis Competitive Analysis: Competed directly with high-performance sports cars such as the Porsche 911, Ferrari 348, Lotus Esprit, and Chevrolet Corvette ZR-1. Differentiated itself through its reliable Honda V6 powertrain, daily drivability, advanced (for its time) aluminum monocoque chassis, and superior build quality. Key Features Key Features: Mid-engine, rear-wheel-drive layout; Naturally aspirated 3.0L V6 engine (C30A); All-aluminum monocoque chassis and body panels; Advanced Variable Valve Timing and Lift Electronic Control (VTEC); Forged aluminum suspension components; Four-wheel Anti-lock Braking System (ABS); Driver-centric cockpit design; Legendary Honda reliability. 📋 Manual Details Coverage Areas Coverage Areas: Engine, Fuel System, Drivetrain, Suspension, Brakes, Steering, Electrical System, HVAC, Bodywork, Maintenance, Troubleshooting, Diagnostics, Specifications, Torque Values, Wiring Diagrams Page Count Page Count: Approximately 1000+ Manual Type Manual Type: Official Factory Service Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Systems Covered: Engine Mechanical, Engine Control System (PGM-FI), Fuel System, Ignition System, Cooling System, Lubrication System, Exhaust System, Transmission (Manual 5-speed), Clutch, Driveshafts, Differential, Suspension (Front & Rear Double Wishbone), Steering (Power Rack & Pinion), Brakes (Front/Rear Discs, ABS), Electrical System (Charging, Starting, Lighting, Ignition, ECU, Sensors, Actuators), HVAC System, Body and Frame, Exterior Trim, Interior Trim, SRS Airbag System (if equipped) Procedures Included Procedures Included: Routine Maintenance, Scheduled Inspections, Engine Tune-up, Valve Adjustment, Timing Belt Replacement, Piston and Ring Installation, Cylinder Head Removal/Installation, Transmission Overhaul, Clutch Replacement, Brake Pad/Rotor Replacement, Suspension Component Replacement, Steering Gearbox Repair, Electrical Component Testing and Replacement, Diagnostic Trouble Code (DTC) Retrieval and Interpretation, SRS System Diagnosis, Air Conditioning System Service, Body Panel Alignment, Body Component Repair Technical Depth Technical Depth: Comprehensive diagnostics, detailed component-level repair procedures, complete overhaul instructions, electrical troubleshooting flowcharts, torque specifications for all fasteners, maintenance schedules, diagnostic trouble codes (DTCs) and their meaning, wiring diagrams for all systems, exploded views of components, specifications and tolerances for all critical parts. 📊 Manual Specifications File Format File Format: Searchable PDF, optimized for digital viewing and printing. Print Quality Print Quality: High-resolution scans of original factory documentation, ensuring clarity of text and diagrams. Binding Type Binding Type: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Primary Engine: C30A1 Engine Type Engine Type: 90-degree V6, Mid-engine, Longitudinal Mounting Displacement Displacement: 3.0 liters (2977 cc) Bore X Stroke Bore X Stroke: 85.0 mm x 85.0 mm Compression Ratio Compression Ratio: 10.2:1 Valvetrain Valvetrain: DOHC 4 valves per cylinder with VTEC Horsepower Horsepower: 270 hp @ 7100 rpm Torque Torque: 210 lb-ft @ 5300 rpm Fuel System Fuel System: Electronic Fuel Injection (PGM-FI) with Sequential Port Injection Ignition System Ignition System: Distributorless Ignition System (DIS) with Coil-on-Plug Engine Cooling Engine Cooling: Water-cooled, pressurized system with electric fan Engine Oil Capacity Engine Oil Capacity: 5.7 US quarts (5.4 Liters) with filter Engine Oil Specification Engine Oil Specification: API SG or SH, SAE 5W-30 or 10W-30 viscosity recommended Timing Belt Replacement Interval Timing Belt Replacement Interval: 60,000 miles or 5 years Spark Plug Type Spark Plug Type: Iridium, NGK PFR7G-11S (or equivalent) 🔧 Transmission Standard Standard: 5-speed Manual Transaxle (Type: NSX-T, M5HA) Optional Optional: None for 1991 model year Gear Ratios Manual Gear Ratios Manual: 1st: 3.285, 2nd: 2.071, 3rd: 1.307, 4th: 1.096, 5th: 0.853, Reverse: 2.444, Final Drive: 4.235 Transmission Fluid Type Transmission Fluid Type: API GL-4 SAE 75W-90 Manual Transmission Fluid Transmission Fluid Capacity Transmission Fluid Capacity: 2.1 US quarts (2.0 Liters) Clutch Type Clutch Type: Hydraulically operated, dry single-plate diaphragm spring 📐 Dimensions Exterior Length Exterior Length: 174.0 inches (4420 mm) Exterior Width Exterior Width: 81.2 inches (2062 mm) Exterior Height Exterior Height: 44.1 inches (1120 mm) Wheelbase Wheelbase: 101.4 inches (2575 mm) Front Track Front Track: 59.1 inches (1500 mm) Rear Track Rear Track: 60.4 inches (1535 mm) Ground Clearance Ground Clearance: 5.1 inches (130 mm) Curb Weight Curb Weight: 3,105 lbs (1408 kg) Front Brakes Front Brakes: 11.8-inch ventilated discs with 2-piston calipers Rear Brakes Rear Brakes: 11.1-inch ventilated discs with single-piston calipers Wheel Size Wheel Size: 16-inch front, 17-inch rear Tire Size Front Tire Size Front: 205/50ZR16 Tire Size Rear Tire Size Rear: 225/50ZR16 (Later models/specifications may vary slightly) Wheel Bolt Pattern Wheel Bolt Pattern: 5 x 114.3 mm (5 x 4.5 inches) 🛡️ Safety Features Ratings Ratings: NHTSA: Not officially rated for this era, but design incorporated advanced safety features. Active Features Active Features: Anti-lock Braking System (ABS), Traction Control System...