RADIUM MULTI-PUMP FUEL SURGE TANK (MPFST) – WALBRO 460 E85, F90000267/274/285

On vehicles with poorly baffled fuel tanks, hard cornering and braking under load can starve your fuel pump at exactly the wrong moment. The Radium Engineering Multi-Pump Fuel Surge Tank (MPFST) solves that without cutting into your factory tank — a buffered reservoir that keeps your high-flow pumps fed no matter how the fuel sloshes.

WHAT A SURGE TANK ACTUALLY DOES

Your OEM in-tank pump acts as a lift pump, feeding the surge tank. The volume held inside the MPFST buffers your engine's fuel supply — even if the lift pump starves momentarily — topped up by both the lift pump and return flow from your fuel pressure regulator. Excess fuel returns to the main tank. It's the fastest way to upgrade fuel delivery for a forced-induction build without opening the stock tank.

BUILT FOR MULTI-PUMP SETUPS

The MPFST runs 1, 2, or 3 high-flow pumps and merges their output into a single outlet, simplifying your external plumbing considerably. Because compatible pumps use an internal check valve, staging multiple pumps is straightforward — and the brushless Ti Automotive E5LM configuration includes check valves as standard.

SWIRL POT DESIGN ELIMINATES AIR

Fuel entering through the "SUPPLY" and "RETURN" ports is redirected tangentially through the canister, creating a swirl pot effect that eliminates air bubbles and fuel foam before they can affect pump performance or engine response.

Key Features:

• Multi-Pump Configuration – Runs 1, 2, or 3 pumps, merged to a single outlet
• 10AN ORB "PUMP OUT" Port – Preinstalled with -8AN male adapter fitting
• 8AN ORB Supply, Return & Overflow Ports – Preinstalled with -6AN male adapters; interchangeable
• Swirl Pot Design – Tangential fuel entry eliminates air bubbles and foam
• Anodised Aluminium Pump Bracket – Secure mounting for all installed pumps
• Chemically Compliant Wiring – Internal wiring rated for gasoline, ethanol, and methanol
• Stainless Steel Mesh Inlet Screen – Pre-pump filtration on all brushed pump positions
• High-Current Electrical Studs – Ring terminals and hardware included
• Sold Without Pumps – Ready for 1–3 pumps of your choice
• E85 Compatible

Specifications:

Starvation isn't an option at this level. Pair the MPFST with your pump selection of choice and keep fuel delivery consistent no matter how hard you push. Available at Racer Industries.