Spool FX-170 HPFP Upgrade | AMG GT / GTS / GTC / GTR (M178)
The Spool Performance FX-170 is a high-pressure fuel pump (HPFP) performance upgrade for Mercedes-AMG M178 engines. This solution is designed for high-power configurations of the AMG GT model range, where the standard fuel system acts as a limitation in tuning.
What is the FX-170?
The FX-170 is an upgraded high-pressure pump with a larger cylinder bore than standard. This provides approximately +50% greater fuel flow.
- +50% flow compared to stock
- Full E85 compatibility
-
Plug & Play installation: no cutting or wire modification
- Allows for increased fuel delivery at higher power levels
The added capacity allows for:
- Higher ethanol blends
- Larger turbochargers
- Significantly higher power levels
Why is an upgrade necessary?
The M178 engine's standard HPFP limits performance in tuning:
- Insufficient fuel delivery for high power
- Limited ethanol usage
The FX-170:
- Significantly increases fuel system capacity
- Enables more efficient and safer tuning
- Supports demanding turbo and flex fuel setups
Package contents
- 2 x FX-170 high-pressure fuel pumps
- Upgraded fuel lines + installation hardware
- Bosch 10 micron high flow fuel filter
- Ethanol content monitoring system (optional, mobile and watch application)
Spool 10-micron filter
- Top-tier filtration without significant pressure drop
- Protects HPFP and injectors from contaminants
- Optimized for the M178 platform
Spool Ethanol Content Monitor (optional)
- Real-time ethanol content and fuel temperature display
- Mobile and smartwatch app support
- BLE 4.0 connectivity
- 0-5V output for flex fuel systems
- PTFE-lined, braided stainless steel E85-compatible fuel lines
Software Requirements
The FX-170 requires software modifications:
- Calibration must be performed before use
- Without adjustment, use may cause damage and void the warranty
Spool:
- Provides calibration data to the tuner
- Assists in connecting with experienced tuners
Note: Spool does not offer ready-made custom tunes
Important note: LPFP
The low-pressure fuel system is critical:
- Insufficient LPFP can damage HPFP and injectors
- HPFP lubrication relies on fuel flow
- Lack of fuel → wear and failure
Recommendation: ensure adequate low-pressure side upgrade