FREE TOOL · COMBUSTION EFFICIENCY
BSFC calculator
Brake Specific Fuel Consumption — how many lb of fuel per HP per hour. The single best metric for combustion efficiency. Modern petrol turbo OEMs achieve BSFC ~0.45 at peak power; race builds hit ~0.40.
BSFC reference
| Engine | BSFC at peak power |
|---|---|
| Stock OEM diesel | 0.45 lb/hp·h |
| Stock OEM petrol NA | 0.50 |
| Stock OEM petrol turbo | 0.55-0.60 |
| Stage 3 petrol turbo (E85) | 0.75 |
| Race-fuel-mapped F1 V8 | 0.30 |
| Methanol race engine | 1.0-1.1 |