Mazda 13B Engine Workshop Manual
The 13B engine is a 1.3-liter twin-rotor Wankel engine that was used in the Mazda RX-7 FC. It was a more powerful and technologically advanced version of the previous 12A and was offered in two variants:
- 13B-DEI (naturally aspirated, 146-160 hp)
- 13B-Turbo (Turbo II) (turbocharged, 182-205 hp)
| Mazda WTB Course. Study materials in English on rotary engines | Download |
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Mazda RX-7
| Mazda RX-7 FC 13B Engine Workshop Manual p1 | Download |
| Mazda RX-7 FC 13B Engine Workshop Manual p2 | Download |
| Mazda RX-7 FD 1992-2002 13B Engine | Download |
| Mazda RX-7 FD 1992-2002 Lubrication system | Download |
| Mazda RX-7 FD 1992-2002 Cooling system | Download |
| Mazda RX-7 FD 1992-2002 Fuel and emissions control systems | Download |
| Mazda RX-7 FD 1992-2002 Engine electrical systems | Download |
Mazda RX-8
| Mazda RX-8 (2003-2012) Engine Troubleshooting DTC 13B-MSP | Download |
| Mazda RX-8 (2003-2012) Engine Details, Mechanical, 13B-MSP | Download |
| Mazda RX-8 (2003-2012) Engine Control System 13B-MSP | Download |
Specifications 13B
Volume: 1.3 l (2 rotors of 654 cm³)
Rotor diameter: 104 mm
Compression ratio: 9.4:1 (atmospheric) / 8.5:1 (turbo)
Fuel system:
- Atmospheric: electronic fuel injection (EFI)
- Turbo: EFI + Hitachi HT-18 turbocharger
Power:
- 13B-DEI (atmospheric) – 146-160 hp
- 13B-Turbo (Turbo II) – 182-205 hp
Torque:
- Atmospheric – 183 Nm
- Turbo – 269 Nm
Advantages of the 13B engine
✅ Compactness and light weight – The engine is light due to the absence of a valve mechanism.
✅ High revs – The red zone starts at 7,000 rpm.
✅ Smooth operation – Unlike piston engines, rotary engines operate more smoothly.
✅ Great tuning potential – Turbocharged versions can be accelerated to 300+ hp.
13B engine problems
❌ High fuel consumption – Even in stock 13B consumes 15+ l/100 km.
❌ Low service life (100-150 thousand km) – Apex Seals wear out quickly.
❌ Overheating – A poor cooling system can lead to engine failure.
❌ High oil consumption – Requires regular oil top-up (1 l per 1000 km).
❌ Sensitivity to fuel and oil quality – Only good fuel and oil should be used to extend service life.