Spool FX-170 HPFP Upgrade | BMW S63
The Spool Performance FX-170 is a high-pressure fuel pump (HPFP) performance upgrade for BMW S63 engines. This package is designed for demanding high-power V8 twin-turbo builds where the standard fuel system is no longer sufficient to support increasing power goals.
What is the FX-170?
The FX-170 is an upgraded high-pressure pump with a larger cylinder bore than standard. This allows for approximately +50% greater fuel flow.
- +50% flow compared to stock
- Full E85 compatibility
-
Plug & Play installation: no cutting or wiring modifications
-
+25% higher operating pressure → improved injector capacity
The additional capacity allows for:
- Higher ethanol blends
- Larger turbochargers
- Significantly higher power levels
Why is an upgrade necessary?
The S63 engine's stock HPFP is a limiting factor in tuning:
- Insufficient fuel delivery for high power levels
- Ethanol blends remain limited
FX-170:
- Significantly increases fuel system capacity
- Improves injector flow with higher pressure
- Enables more powerful and safer tuning
Package Contents
- 2 x FX-170 high-pressure fuel pump
- Upgraded fuel lines + installation hardware
- Ethanol content monitoring system (with mobile app)
- Bosch 10 micron high-flow fuel filter
Spool Ethanol Content Monitor
- Real-time display of ethanol content and fuel temperature
- Connects to mobile app (BLE 4.0)
- Enables precise mixture control
- Operates simultaneously with other Bluetooth devices
Spool 10-micron filter
- High-level filtration without significant pressure loss
- Protects HPFP and injectors from contaminants
- Specifically designed for the S63 platform
Software Requirements
Operating the pump requires software modifications:
- Calibration must be performed before engine startup
- Operation without adjustment can cause damage and void the 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 side 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