Replacement Fuel Tank for 6.6L L8T Gas Engine Applications
When retrofitting a classic 1949-1952 Chevy chassis with a modern 6.6L L8T engine, ensuring reliable fueling under sustained high load becomes a primary concern and this replacement fuel tank assembly is designed to satisfy it. Its integrated 400 LPH Walbro pump stays submerged to reduce vapor lock and maintain consistent fuel pressure through sharp throttle transitions without the need for external return lines. Engineers will appreciate the direct fit construction that secures to stock frame mounting points, includes a matched sending unit and all necessary straps, gaskets and hardware to preserve factory geometry and speed installation. Crafted from welded steel, the design resists corrosion and vibration to deliver lasting service in demanding EFI conversions.
High Capacity 400 LPH Pump for Demanding Engine Builds
This fuel tank assembly incorporates a 400 LPH Walbro pump calibrated to supply more than 550 horsepower applications with the fuel volume they demand. By providing a substantial flow margin, the pump prevents lean spikes at wide open throttle and under boost, which in turn protects critical engine components from detonation and thermal stress. Consistent flow also translates to smoother throttle response and more predictable power delivery during sudden load changes. Engine builders running supercharged or heavily modified naturally aspirated setups will find the extra headroom vital for maintaining an optimal air fuel ratio in high rpm conditions. The pump's internal design maintains reliable performance throughout extended track sessions or back to back street runs where fuel requirements never let up.
Pump Module Design within the Tank for Heat and Vapor Control
Positioning the pump below the fuel surface leverages the cooling effect of the surrounding gasoline to minimize heat soak and reduce the risk of vapor formation under extreme thermal loads. An integrated strainer at the module inlet traps debris before it reaches the impeller, extending service life and guarding against momentary fuel starvation. A built-in check valve holds rail pressure during rapid throttle lifts, ensuring instant response without the lag common in external return systems. Eliminating external return plumbing not only simplifies the fuel system but also reduces potential leak points. This cohesive approach maintains unwavering pressure during hard cornering or sustained acceleration in demanding conversion projects.
Precision Shaped Sending Unit for Reliable Fuel Level Feedback
The sending unit is custom formed to follow the original tank contour, delivering accurate level data even when the chassis experiences significant lateral or longitudinal G loads. Modern EFI control strategies rely on precise fuel level readings for pump command algorithms and diagnostic thresholds, making consistent sensor output crucial to both performance and safety. Careful calibration ensures the gauge remains true from full down to the last drop, eliminating dry run surprises during spirited driving or track events. This level of feedback builds confidence in decision making at the pump and prevents situations where fuel reserves become unpredictable. Professional restorers will appreciate that no further adjustments are needed to integrate this unit with factory or aftermarket instrumentation.
Comprehensive Direct Fit Kit for Classic Chevy EFI Conversions
This all inclusive kit arrives complete with the high flow pump, tank module, sending unit, steel tank straps, filler neck, vent filter, gaskets and installation hardware. Each component is engineered to attach precisely to the original 1949-1952 Chevrolet frame mounting points, eliminating the need for custom brackets or welding modifications. The welded steel tank resists corrosion and stands up to chassis vibration, delivering service life on par with OE designs. By maintaining factory geometry and providing every gasket and fastener, the kit reduces installation time and streamlines troubleshooting. Whether you are restoring a project car or building a weekend racer, this assembly ensures a professional fuel system foundation without the hassle of sourcing individual parts.
For the same item but the 255 LPH pump tank kit which offers less horsepower see our 1949-1952 Chevy EFI Fuel Tank Kit - Stock Capacity - 255 LPH Pump and trust this assembly to deliver consistent fueling under sustained high load.