Honda L15B7 Engine Swap: The Ultimate Legal Performance Upgrade for Project Cars
The Honda L15B7 engine swap represents a significant advancement in engine swap technology, combining increased performance with modern efficiency. This 1.5-liter turbocharged engine delivers superior power while maintaining excellent fuel economy and lower emissions compared to traditional B-series and K-series swaps.
White Honda Civic with red accents
Key Advantages of L15B7 Swap:
- Over 235 horsepower at the flywheel
- More than 215 ft-lb of torque to the wheels
- Advanced turbocharging and direct injection
- Variable cam timing on both intake and exhaust
- BAR-certified potential for legal compliance
- Improved fuel efficiency over previous swap options
Honda engine bay
Compatible Vehicles:
- Honda Fit (all three generations)
- 1992-1995 Civic
- 1996-2000 Civic
- 1994-2001 Integra
- 2015 Honda CR-Z (proven successful)
Required Components:
- L15B7 engine (2017-2021 Civic Si)
- Engine harness
- ECU
- Electronic pedal assembly
- EVAP system from donor vehicle
- Conversion harness (available through JDI)
- Engine mounts (available through Hasport)
Honda Civic Si 1.5L turbo engine
Performance Benefits:
- Doubled power output in most applications
- Enhanced torque delivery
- Improved throttle response
- Modern engine management capabilities
- Flex fuel compatibility potential (+40hp with E85)
Civic SI dyno: 91-gas vs E85
Honda CR-Z power graph on 91-octane
L15B7 engine torque on 91 octane
The L15B7 swap represents the next evolution in Honda engine swaps, offering a perfect balance of performance, efficiency, and modern technology. With proper planning and the right components, this swap can be both legal and highly effective for various Honda platforms.
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White Honda CR-Z parked outside
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