Click here to download installation instructions (PDF)
To configure a complete fuel cell with FCST-X and other accessories, click below:
BACKGROUND
Since 2010, external Radium Engineering fuel surge tanks have been an excellent way to eliminate fuel starvation that occurs in racing. To simplify plumbing and packaging, Radium Engineering introduced the first to market Fuel Cell Surge Tank (FCST) in 2013. The current generation of the FCST is still a great cost efficient solution and are found HERE. This FCST quickly became the preferred fuel system for the competition vehicle market and professional racing. After 10 years of kaizen, the transformation brings the release of the FCST-X (Fuel Cell Surge Tank-10 Years).
FCST-X FEATURES
LEGACY FCST FEATURES
The features listed below carry over from previous fuel cell surge tanks.
-Merged single 10AN ORB female threaded outlet. All pumps use check valves that prevent back-flow.
-One-way fill valves (355LPH each) allows fuel in, but not out, keeping the surge tank full.
-Multiple fuel pump options including gerotor, turbine, and brushless DC motor pumps.
-Hermetically sealed high-current stainless steel electrical studs capable of handling all pumps.
-Simplified servicing eliminates sealing washers and fuel cell retaining brackets.
-Full CNC aluminum construction with anodized surfacing for superior corrosion resistance.
-Fuel compatibility: leaded and unleaded gasoline, methanol, ethanol, E85, etc.
-Optional fuel surge tank level switch and diagnostic LED failsafe port.
-Rollover vent valve protection 
NEW FEATURES
In addition to all previous FCST features, the new FCST-X rendition is packed with innovations.
-Fast lift and surge pump access (9 bolts total)
-Integrated lift handle for fuel pump servicing
-Lightweight surge tank increased from 2.2L to 2.6L
-Compatible with up to 4 brushless fuel pumps
-Up to 4 Bosch BR540 fuel pumps (DW400)
-Up to 3 Ti Automotive E5LM brushless pumps
-Up to 4 brushless Bosch pumps (DW440)
-Compatible with 16AN inlet mechanical pumps
-Easily swappable pump modules (sold separately)
-Compatible with shrouded level sensors
-Designed with less potential leak points
-Improved fluid control for quick filling
-Optimized internal fluid management
-Enhanced roll over protection
-Anti-rotation electrical terminals
SPARE DROP-IN PUMP MODULES
An FCST-X spare drop-in pump module is an additional lift and surge pump assembly for super fast pit stops. If fuel pressure issues arise, 9 bolts out and back in will get your team back on the track. Pumps are not included.
Radium P/N: 20-1996 is shown below.
PUMP COMPATIBILITY
- Walbro GSS342
- AEM 50-1200
- *Deatschwerks DW440
*Use the electrical connector provided with the pumps.
Radium P/N: 20-1997 is shown below.
PUMP COMPATIBILITY
- **Bosch BR540
- *Deatschwerks DW400
*Use the electrical connector provided with the pumps. For the lift pump, use the filter sock provided with the pump.
**Because this pump does not include a built-in check valve, multiple surge pumps must be ran together (not staged).
Radium P/N: 20-1998 is shown below.
PUMP COMPATIBILITY
- Walbro F90000267
- Walbro F90000274
- Walbro F90000285
- *Walbro F90000295
*Because this pump does not include a built-in check valve, multiple surge pumps must be ran together (not staged).
Radium P/N: 20-1999 is shown below.
SURGE PUMP COMPATIBILITY
- *Ti Automotive E5LM (check valves included)
LIFT PUMP COMPATIBILITY
- *Ti Automotive E5LM
- **Walbro F90000267
- **Walbro F90000274
- **Walbro F90000285
- **Walbro F90000295
*This pump requires a brushless controller. These typically come standard when purchasing the pump. See Ti Automotive BKS1001.
**For these pumps, it is recommended to use the Radium Engineering 14-0143 filter sock.
FUEL LEVEL SENDER
The FCST-X comes standard with a fuel level sender block-off plate. However, SAE fuel level sensors of various lengths can be purchased separately HERE.
FUEL LEVEL SWITCH / DIAGNOSTIC INDICATOR
The FCST-X comes standard with a 2AN ORB plug preinstalled in the "level switch" port. For information on adding a fuel level switch and diagnostic indicator, click HERE. This little device provides a warning when the fuel level inside surge tank canister drops by 20% or more.