Spool FX-170 HPFP Upgrade | BMW N63
The Spool Performance FX-170 is a high-pressure fuel pump (HPFP) performance upgrade for BMW N63 engines. This assembly is specifically designed for high-power V8 turbo builds where the stock system is no longer sufficient to meet increased fuel demands.
What is the FX-170?
The FX-170 is an upgraded HPFP with a larger piston diameter than the stock pump. 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 → better injector capacity
Additional capacity allows for:
- Higher ethanol blends
- Larger turbochargers
- Significantly higher power levels
Why is an upgrade necessary?
The N63 engine's stock HPFP quickly becomes a limitation in tuning:
- Insufficient fuel delivery for high power
- Ethanol blends remain limited
The 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
- Displays real-time fuel ethanol content and temperature
- Connects to mobile app (BLE 4.0)
- Allows precise fuel mixture control
- Compatible with other Bluetooth devices simultaneously
Spool 10-micron filter
- Excellent filtration performance without significant pressure drop
- Protects HPFP and injectors from contaminants
- Specifically designed for the N63 platform
Software Requirements
The FX-170 requires software modifications before commissioning:
- Calibration must be performed before starting the engine
- Operation without adjustment can cause damage and void the warranty
Spool:
- Provides calibration data to your tuner
- Helps find an experienced tuner
Note: Spool does not provide 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 LPFP upgrade before commissioning