RADIUM ENGINEERING FCST-X Pumps Not Included (Walbro F90000267/274/285)

Radium Engineering 20-1992-00 – FCST-X (Fuel Cell Surge Tank)

Pump-ready module for up to three Walbro F90000267/274/285 pumps

The FCST-X is a drop-in fuel delivery system that places a self-contained 2 L surge tank and up to three high-pressure pumps inside the fuel cell. It eliminates fuel starvation and maintains constant pressure under extreme G-loads, making it ideal for high-power, E85-fed race vehicles.

• Universal 6 × 10″, 24-bolt flange fits most ATL, FuelSafe, Radium RA-Series and other cells with the same opening.

• Dual-chamber design: a dedicated 2 L surge tank with three baffled sections (A/B/C) lets you run 1–3 pumps without back-flow issues.

• Integrated lift pump cavity for one Walbro F9000xxx unit that feeds the surge tank; three FKM check valves automatically balance fuel level.

• -8 AN ORB feed/return ports and -6 AN ORB vent support single, dual or triple-pump configurations.

• Complete wiring harness with sealed Deutsch DT connectors and M20 bulkheads—rated for continuous submersion in fuel.

• Compatible with gasoline, E85 and methanol thanks to anodized aluminum, stainless hardware and Viton® seals.

• Pre-drilled bosses accept an optional float-style level sender (0–90 Ω or 240–33 Ω).

• Compatible high-pressure pumps: 1–3 × Walbro F90000267/274/285 (Ø 39 mm)
• Minimum cell depth: ≥ 7.7″ (196 mm) from flange to floor
• Internal surge tank volume: 2 L
• Flange pattern: 6 × 10″, 24 × UNC 1/4-28
• Feed / return ports: ‑8 AN ORB
• Vent port: ‑6 AN ORB
• Materials: 6061-T6 aluminum (anodized), stainless steel, FKM

• Drift, time-attack, endurance racing, rally-raid.

• Perfect for E85 conversions and builds exceeding 800 hp.

• Simplifies plumbing by replacing external swirl pots and reducing potential leak points.

• FCST-X module 20-1992-00 (pumpless).

• 80 µm stainless pre-filter, Viton® 6 × 10″ gasket, full set of stainless bolts.

• Internal wiring and Deutsch pass-throughs.

• Installation manual with torque specifications.