Description
Overview
The FASS Adjustable Diesel Fuel Lift Pump 250F is engineered to be one of the most versatile high-performance fuel systems available for the 1999-2007 Ford Powerstroke. Part of the FASS Signature Series ADJ Fuel System line, this kit is built around the same proven motor found in the Titanium Signature Series, delivering a robust 220 gallons per hour (220GPH) of clean, air-free diesel to feed demanding performance and competition engines. Whether your build sits in the moderate range or pushes deep into extreme territory, this system is rated to support setups in the 600-900 HP class.
What sets the 250F apart is true adjustability. Instead of being locked to a single output, this pump lets you dial in fuel pressure anywhere from 1 to 75 PSI, with a nominal 55 PSI target, so you can customize fuel delivery precisely to your race or competition Powerstroke’s needs. That flexibility makes it a smart choice for tuners who change configurations or chase specific pressure targets under load.
Key Benefits
To keep fuel pressure stable when it matters most, FASS integrated a boost compensation port into the design. Under full throttle, air pressure drawn from your intake manifold raises fuel pressure in step with boost, helping maintain consistent fuel delivery during heavy acceleration and hard pulls. The result is more reliable fueling exactly when your engine is working the hardest.
- Adjustable fuel pressure from 1-75 PSI to tune delivery for race or competition applications
- High 220GPH flow rate to support builds in the 600-900 HP range
- Same motor used in the FASS Titanium Signature Series for proven performance
- Boost compensation port raises fuel pressure with intake manifold air pressure under full throttle
- Machined from durable 6061 T-6 Billet Aluminum with a black finish
- Sold as a complete kit including a Bulkhead Fitting and Suction Tube
Kit Contents & Bulkhead Fitting
This system is sold as a kit and includes a Bulkhead Fitting and Suction Tube. Machined from 6061 T-6 Billet Aluminum, the Bulkhead fitting functions as both a suction tube and return. It features a 5/8-inch Suction Tube along with a 1/2-inch Fuel Return Port. This new and improved design over the previous suction tube gives you a cleaner, more capable way to plumb your FASS system for both draw and return.
Fitment
The FASS 250F Adjustable Diesel Fuel System is designed for 1999-2007 Ford Powerstroke Truck and SUV applications, covering the 7.3L and 6.0L platforms. If you’re chasing consistent, tunable fuel delivery for a high-horsepower Powerstroke, the adjustable 250F offers the flow, pressure control, and billet construction to match your goals.
