Spool FX-200 HPFP Kit | AMG M157
The Spool Performance FX-200 is a high-pressure fuel pump (HPFP) performance upgrade for Mercedes-AMG M157 engines. This model represents the next stage of evolution, offering significantly increased fuel capacity for demanding high-power V8 biturbo builds.
What is the FX-200?
The FX-200 is an upgraded high-pressure pump with a larger piston diameter than the stock unit. This allows for approximately twice the fuel flow compared to the original pump.
- Approximately 2x flow compared to stock
- Full E85 compatibility
- Plug & Play installation without cutting or wiring modifications
- Enables significantly higher fuel delivery
The increased capacity allows for:
- Higher ethanol blends
- Larger turbochargers
- Significantly higher power levels
Why is an upgrade necessary?
The stock HPFP on the M157 engine is a clear bottleneck for tuning:
- Insufficient fuel supply for high power levels
- Limited use of ethanol blends
The FX-200:
- Doubles the fuel system capacity
- Significantly raises the platform's fuel limits
- Enables more powerful and safer tuning
Package contents
- 2 x FX-200 high-pressure fuel pump
- Upgraded fuel lines + installation hardware
- Bosch 10-micron high-flow fuel filter
- Ethanol content monitoring system (optional, with mobile app)
Spool 10-micron filter
- Highly efficient filtration without significant pressure drop
- Protects HPFP and injectors from contaminants
- Recommended addition for high-power configurations
Spool Ethanol Content Monitor (optional)
- Real-time ethanol content and fuel temperature display
- Mobile application with BLE 4.0 connectivity
- 0–5V output for flex fuel systems
- Full E85 compatibility for fuel lines
Software requirements
Pump operation requires software modifications:
- Calibration must be done before commissioning
- Operating without adjustment can cause damage and void the warranty
Spool:
- Provides calibration data to the tuner
- Helps find an experienced tuner if needed
Note: Spool does not offer ready-made custom tunes
Important note: LPFP
The low-pressure fuel system is critical:
- Insufficient LPFP can damage the HPFP and injectors
- HPFP lubrication relies on fuel flow
- Lack of fuel can lead to wear and failure
Recommendation: ensure sufficient low-pressure side upgrade