Spool FX-400 HPFP fuel pump, BMW B58 Gen1 engines

Introducing the FX-400: Unleashing Power for Your BMW B58 Engine. Meet the FX-400, the next-level high-pressure fuel pump meticulously designed to elevate BMW B58 motor’s performance, surpassing the market leader FX200 with +20% more flow and 250bar compatibility. This upgraded pump boasts an enlarged bore size, approximately doubling the flow compared to stock pumps. With seamless E85 compatibility and a hassle-free plug-and-play installation that requires no cutting or splicing, the FX-400 opens the door to increased ethanol concentrations and facilitates fueling for larger turbos. Optimal upgrade to use with upgraded Spool IFX150 GEN1 DI injector upgrade, allows you to use high output with direct injection only!

Why Opt for the FX-400?

The factory-installed HPFP on the B58 motor imposes significant limitations when attempting to tune and enhance the engine’s output. Enter the FX-400, injecting double the flow capacity into the equation. This not only raises the fueling limits on the platform but also empowers you to accommodate larger turbos and higher concentrations of ethanol blends.

Is it needed?

Yes. Any strong Stage2, Stage3 or Stage4 build of B58 is severy limited by stock fuel pump. Keep in mind that the FX-400 demands calibration adjustments for optimal performance. It’s crucial to implement these changes before starting your car with the upgraded pump to prevent potential damage and warranty voidance. Spool Performance offers detailed calibration information that can be shared with your current tuner, or they can connect you with seasoned tuners that already have preset settings for this pump (many tuners working with MHD, Bootmod3, etc.). Custom tuning is essential to extract the full output from the upgraded pump, tailored to your specific vehicle setup and ambient conditions. While Spool Performance focuses on hardware, they can provide valuable assistance with any queries your tuner may have.

Remember Enhanced Low Pressure Fuel Pump

Ensuring proper low-pressure fueling is paramount for the smooth operation and durability of high-pressure pumps and injectors in a Direct Injection (DI) system. Insufficient low-pressure fueling poses risks of damage to the pump piston and bore, as they rely on controlled fuel leakage for lubrication. Detectable damage resulting from low-pressure starvation could lead to voided warranties. It’s imperative to meticulously plan your fuel system build, incorporating appropriate low-pressure upgrades when necessary.