Mechanical Fuel Pump - Buick V8

The Carter Mechanical Fuel Pump for Buick V8 (model M4511) is a direct-replacement, engine-mounted fuel delivery solution designed specifically for big block Buick engines. This pump operates mechanically via camshaft actuation, eliminating reliance on electrical circuits for fuel supply—a critical advantage in classic restorations, hot rods, and vehicles where simplicity and reliability matter most. For mechanics and enthusiasts rebuilding vintage Buicks or swapping big block engines, this mechanical pump provides straightforward installation and proven durability in high-heat engine compartments.

This unit delivers 120 gallons per hour at a regulated pressure range of 5.5–6.5 psi, making it ideal for stock and mildly modified fuel systems. The pump features an aluminum body construction in natural finish, paired with a 3/8-inch hose barb inlet connection and a 5/8-inch inverted flare female outlet fitting—specifications that align with classic Buick fuel line standards. The mechanical design leverages camshaft lobes to create suction and discharge strokes, eliminating electrical dependency and reducing potential failure points in vintage ignition systems or heavily modified engine bay wiring.

Mechanics restoring original 455, 400, or 350 big block Buicks will find this pump directly compatible with OEM fuel system layouts, while hot rod builders appreciate the compact 4.65 x 4.55 x 10.5-inch footprint and lightweight 1.62-pound design. Installation requires standard fuel line adapters and a small amount of Teflon tape on threaded connections; no modifications to the engine block or fuel tank are necessary. This Carter pump handles gasoline fuel exclusively and performs reliably across normal street-driving temperatures and light performance use.