Spool FX-170 HPFP Kit | AMG M133
The Spool Performance FX-170 is a high-pressure fuel pump (HPFP) performance upgrade for Mercedes-AMG M133 engines. This solution is designed to eliminate the fuel limitations of the stock system, enabling significantly higher power potential in tuned configurations.
What is the FX-170?
The FX-170 is an upgraded HPFP featuring a larger cylinder bore than the stock pump. This delivers approximately +50% more fuel flow.
- +50% flow compared to stock
- Full E85 compatibility
-
Plug & Play installation: no cutting or wiring modifications
- Enables increased fuel delivery for higher power levels
The added capacity allows for:
- Higher ethanol blends
- Larger turbochargers
- Higher power levels
Why is an upgrade necessary?
The M133 engine's stock HPFP limits performance when tuning:
- Insufficient fuel supply for higher power
- Limited ethanol usage
The FX-170:
- Significantly increases fuel system capacity
- Enables more effective and safer tuning
- Supports demanding turbo and ethanol setups
Package Contents
- 1 x FX-170 High-Pressure Fuel Pump
- Upgraded fuel lines + installation hardware
- Bosch 10-micron high-flow fuel filter
- Ethanol content measurement system (optional, with mobile app)
Spool 10-micron filter
- Excellent filtration performance without significant pressure loss
- Protects HPFP and injectors from contaminants
- Recommended addition for high-power setups
Spool Ethanol Content Monitor (optional)
- Real-time display of ethanol content and fuel temperature
- Connectivity to mobile app (BLE 4.0)
- Enables precise fuel mixture control
- Full E85 compatibility for fuel lines
Software Requirements
The FX-170 requires software modifications:
- Calibration must be done before commissioning
- Operating without adjustment can cause damage and void warranty
Spool:
- Provides calibration data to the tuner
- Helps find an experienced tuner
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 → wear and failure
Recommendation: ensure adequate low-pressure side upgrade