Surge Tank QSST Dual 340 LPH Pumps

The Surge Tank QSST Dual 340 LPH Pumps from FUELAB FUEL SYSTEMS represents a professional-grade surge tank assembly engineered for high-performance fuel delivery in modified vehicles requiring redundant pump capacity. Built for serious enthusiasts and mechanics working on turbocharged, supercharged, or naturally aspirated performance builds, this unit solves the fuel delivery bottleneck that emerges when stock systems cannot sustain power levels beyond 400–500 hp. Whether you're tuning a street car for reliability or building a track-focused platform, dual 340 LPH capacity ensures consistent fuel pressure across the entire rpm range and throttle response envelope.

The dual-pump architecture of this surge tank delivers 680 LPH combined flow at full load, with each 340 LPH unit running independently to prevent cavitation and fuel starvation during hard acceleration, cornering, or sustained high-boost conditions. The QSST design incorporates surge capacity to handle transient demand spikes—critical when injector pulse width compresses during acceleration and fuel rail pressure fluctuates. Internal baffles prevent fuel slosh while dual inlet ports allow both pumps to draw from a single tank reservoir, and the compact 12.6 × 12.3 × 16.1 inch footprint fits most engine bay or trunk-mounted fuel system configurations. At 10.65 lbs, the assembly balances structural integrity with weight efficiency, essential for performance vehicles where rotational and unsprung mass directly impacts handling and acceleration metrics.

This surge tank excels in LS-swap builds, modern muscle car modifications, and aftermarket fuel system retrofits where OEM tanks cannot support tuned engine airflow and injector sizing. Turbocharged four-cylinder platforms, big-displacement stroker engines, and nitrous oxide systems all benefit from the redundant flow and pressure stability this dual-pump configuration provides. Installation pairs seamlessly with aftermarket fuel rails, regulators, and custom plumbing—ensure your fuel lines, fittings, and regulator are rated for the operating pressure of your chosen fuel pump controller. Mechanics should verify tank clearance in the mounting location and confirm that both pump electrical connectors receive dedicated relay circuits from the ECU to maximize pump lifespan and prevent undervoltage shutdown during heavy load.