High-Flow Surge Pump for 1984-1989 Corvette Cooling System
This Surge Pump for 1984 to 1989 Corvette cooling systems is crafted to keep the Walbro 255lph pump fully submerged during hard cornering on C4 chassis fitted with LS or LT engines. Mounted directly to the factory radiator, its lightweight billet 6061 T6 housing holds the module in place without adding unnecessary mass up front. It resists corrosion from ethanol and methanol blends thanks to its anodized finish and precision machining. Installers will appreciate the prewired connectors and standard AN fittings that make setup straightforward and reliable.
Consistent Fuel Delivery During Aggressive Cornering
By positioning the Walbro 255lph pump entirely below the fuel level, this design ensures a uniform suction head when the Corvette faces lateral acceleration. Keeping the unit fully submerged prevents air pockets at the inlet that can lead to hesitation or fuel starvation under high g conditions. The direct mounting to the factory radiator combines structural support with minimal plumbing complexity, so the pump remains engaged even during rapid directional changes. As a result, throttle response stays smooth and predictable, which is vital when navigating winding roads or track sessions. This approach preserves engine performance by eliminating transient lean spikes, giving drivers confidence in sustained power delivery.
6061 T6 Aluminum Housing Balancing Strength and Weight
The main body is machined from solid 6061 T6 aluminum to achieve exceptional tensile strength without adding unnecessary mass to the front of the chassis. Precision CNC machining produces consistent wall thickness and exact port alignments, minimising the risk of leaks and simplifying routine inspections. Aluminum alloys also excel at heat transfer, helping disperse engine bay warmth and preventing hot spots around the fittings. By retaining factory balance and handling characteristics, this lighter yet robust structure enhances vehicle dynamics without compromising durability, even after repeated heat cycles and vibration over thousands of miles.
Anodized Finish for Chemical and Wear Resistance
Anodizing creates a hard, protective oxide layer that bonds directly to the aluminum surface, delivering outstanding defense against ethanol and methanol blends as well as standard gasoline. Unlike surface paints or coatings that can chip or flake under stress, this treatment remains intact through exposure to fuel spills, road debris, and regular maintenance. The resulting finish also improves corrosion resistance when subjected to moisture or salt. Technicians appreciate its scratch resistance during repeated tightening of AN fittings, as sealing surfaces retain their surface integrity and continue to seal effectively over long term service.
Streamlined Installation with Prewired Harness and AN Fittings
This surge pump arrives ready to mount with a dedicated wiring pigtail designed specifically for the Walbro 255lph module, removing time spent on custom splicing or connector sourcing. Installers benefit from factory matched terminals that clip in securely and resist vibration, while six AN ports provide leak free connections for inlet and outlet lines without secondary adapters. All hardware aligns with original radiator tabs, shortening setup time and reducing the chance of misalignment. Compatibility with gasoline, ethanol, and methanol fuels is guaranteed, making this assembly a versatile solution for LS or LT engine conversions in the C4 Corvette chassis.
Count on consistent pump performance on your Corvette project. For a similar EFI surge tank but this is a dual pump see our MuscleRods EFI Surge Tank - Dual Pumps.