EFI Fuel Tank Kit for 1978-1987 Buick Regal and Grand National LS/LT Swaps
Dropping an LS or LT powerplant into a 1978 through 1987 Buick Regal or Grand National chassis often exposes fuel supply as a limiting factor so this EFI Fuel Tank Kit pairs a 400 LPH pump with an integrated sending unit to maintain pressure above 550 horsepower. When the engine demands peak flow under forced induction or full throttle this assembly prevents lean spikes that can damage pistons or valves. This tank bolts to factory locations on the G Body frame without custom brackets and includes straps gaskets and filler neck parts for a clean installation. A calibrated sending mechanism provides accurate level readings so drivers can plan refills with confidence on both street and track.
High-flow Walbro Pump Performance
The Walbro 400 LPH fuel pump serves as the core of the tank assembly to maintain stable fuel delivery under extreme engine demand. Its design enables a constant pressure output during wide open throttle and boost without allowing pressure to drop. By supporting over 550 horsepower setups the pump gives builders the headroom needed for high boost or advanced timing curves. The unit features a robust housing and internal strainer to resist contamination and maintain flow rate over time. This consistency in fuel supply prevents lean spikes that can harm pistons and valves during sustained high load periods. Teams and tuners can rely on this component for repeatable performance on the street or at the track.
Precision Sending Unit Calibration
The integrated sending mechanism delivers accurate readings by matching the original gauge cluster calibration. It reduces arm travel inside the tank and cuts phantom readings that often occur with adapters and aftermarket modules. Consistent feedback keeps the driver informed of the true fuel state so unexpected refuels are avoided. Calibration ensures the needle moves smoothly across full to empty and mirrors the behavior of the factory system. This precise level sensing aids in trip planning and prevents running out of fuel during long drives or spirited sessions.
Direct Fit Installation Efficiency
This kit is engineered to mount directly to the factory points on 1978 through 1987 Regal and Grand National frames so no custom brackets are needed. Included straps, gaskets, filler neck, vent filter, and hardware cover every aspect of the assembly to streamline the process. By eliminating fabrication the design preserves underbody clearance and maintains chassis integrity during installation. Builders save hours that would otherwise be spent test fitting and modifying parts to achieve proper alignment. The comprehensive nature of the kit means fewer trips to the parts store and reduced downtime. As a result installers can focus on wiring and tuning rather than chasing missing pieces.
Electronic Fuel Injection Response
Converting to electronic fuel injection grants the ECU full control of pump operation based on engine speed, load, and temperature. The system can adjust fuel pressure and flow in real time to sharpen throttle response at low engine speeds and optimize consumption during highway cruise. Precise pulse width control during engine start prevents flooding and protects spark plugs from fouling. This level of management supports smooth power delivery throughout the entire rpm range and improves fuel economy under steady conditions. Drivers notice reduced hesitation and more consistent performance whether navigating city streets or accelerating on the strip. Tuners gain the flexibility to refine fuel maps without worrying about mechanical pump limitations.
Trust MuscleRods for reliable EFI fuel delivery. For a Smaller capacity fuel pump Kit at 255 LPH see our 1978-1987 Buick Regal 255 LPH pump Tank Kit.