1978-1987 Buick Regal/Grand National LS and LT EFI Fuel Tank Kit with 400 LPH Pump
Fuel delivery can become a limiting factor when swapping an LS or LT engine into a G-Body Regal or Grand National, and this EFI fuel tank kit addresses that challenge head on. Built around a 400 LPH Walbro pump and an integrated sending unit, it sustains stable pressure for applications above 550 horsepower and prevents starvation during spirited acceleration or under forced induction. With components that bolt into the original mounting points on 1978 through 1987 chassis and include straps, gaskets, filler neck and vent filter, it simplifies the installation process and provides accurate fuel level feedback for tuner confidence.
High Capacity 400 LPH Pump for 550 HP Engines
At the heart of this EFI fuel tank kit lies a robust 400 LPH Walbro pump designed to handle the demands of engines producing over 550 horsepower. Its ability to maintain steady pressure under both naturally aspirated and forced induction conditions ensures that fuel delivery remains constant during wide open throttle and boost. By supplying ample volume at peak demand, the pump prevents lean spikes that can harm injectors and internal components. Tuners gain the confidence to push timing and boost curves without fear of starvation, while drivers experience smooth power delivery across the entire rev range.
Precision Sending Unit for Accurate Fuel Level Feedback
The integrated sending unit is built into the tank assembly to provide real time level readings with minimal float stick. Calibration is optimized for the original gauge face, eliminating erratic needle movement and phantom fuel warnings. Consistent feedback keeps both drivers and engine control modules informed of actual fuel reserves, reducing the chance of an unexpected empty tank. Accurate monitoring enhances track day planning and long highway runs alike, making the system as dependable as it is precise.
Direct Fit Installation Simplifies G Body Swaps
This fuel tank kit bolts directly into the factory mounting points of 1978 through 1987 Buick Regal and Grand National chassis, avoiding the need for custom brackets or major modifications. Complete straps, gaskets, filler neck and vent filter components are matched to the original layout, so all parts align precisely when it’s time to drop in the engine swap. Installers save hours of trial and error, preserving the structural integrity of the body while ensuring a clean underbody appearance. The straightforward assembly process reduces downtime and lets builders focus attention on the engine and drivetrain.
Electronic Fuel Injection Enhances Throttle Response and Economy
Transitioning from a mechanical system to electronic fuel injection allows the engine management system to vary pump output based on parameters like speed, load and temperature. As a result, throttle response sharpens and fuel economy improves thanks to more accurate metering across all operating conditions. Cold start performance benefits from the precise pulse width control of injectors, eliminating rich cranking phases that waste fuel and foul spark plugs. Drivers enjoy a more predictable and engaging experience whether cruising city streets or pushing hard on backroads.
Built for reliable performance under demanding conditions. To complement your setup with a smaller capacity fuel pump Kit at 255 LPH see our 1978-1987 Buick Regal 255 LPH pump Tank Kit.