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.
Key Features
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).
Technical Specifications
| Item | Value |
|---|
| 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 |
Typical Applications
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.
Kit Contents
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.
