The horsepower of a 671 Detroit engine varies depending on its specific configuration, but a standard, naturally aspirated 6-71 Detroit Diesel engine typically produces between 170 and 228 horsepower.
Understanding the 671 Detroit Diesel Horsepower
The term "671 Detroit" refers to the Detroit Diesel Series 71, specifically the inline 6-cylinder model. This engine family is renowned for its two-stroke design and versatility, having been widely used in various applications, including marine, industrial, and heavy-duty vehicles. The exact horsepower output of a 6-71 Detroit engine can vary significantly based on its specific configuration, such as whether it is naturally aspirated or turbocharged.
Horsepower Variants of the 6-71 Detroit Diesel
The Series 71 engines were produced in several configurations, each offering different power outputs. The most common variants for the 6-71 are detailed below:
| Model | Configuration | Horsepower (hp) | Kilowatts (kW) | RPM at Peak Power |
|---|---|---|---|---|
| 6-71 | Naturally Aspirated | 170–228 | 127–170 | 2100 |
| 6-71T | Turbocharged | 275–285 | 205–213 | 2100 |
| 6-71TT | Twin Turbocharged | 230 | 172 | 1950 |
Key Factors Affecting Horsepower
- Naturally Aspirated (6-71): These foundational models were known for their robust design and reliability, providing consistent power suitable for a wide range of general-purpose applications.
- Turbocharged (6-71T): The addition of a single turbocharger significantly boosted the engine's power output, allowing it to meet higher performance demands. These engines were often preferred for applications requiring more substantial power, such as in larger trucks or marine vessels.
- Twin Turbocharged (6-71TT): While the "TT" designation can vary in meaning across different engine manufacturers, in the context of the 6-71, it denotes a specific configuration that also utilizes forced induction, often optimized for particular power curves or efficiency at different RPMs. It's noteworthy that the 6-71TT has a slightly lower peak horsepower than the 6-71T but achieves it at a slightly lower RPM, indicating different performance characteristics.
The horsepower rating is typically measured at a specific engine speed (RPM), which is also a critical factor in understanding an engine's performance envelope.
