Radium Engineering FCST-X 3 Surge Tank Pumps And 1 Lift Pump Included Walbro F90000274

These FCST-X units come equipped with preinstalled Walbro F90000274 surge tank pumps and another F90000274 pump for the surge tank. Because the lift pump height needs to be set to match the cell, these lift pump is left loose in the packaging. If the FCST-X is assembled into a fuel cell by Radium, the lift pump will be pre-installed as well.

• The -01 will contain 1 surge tank pump.
• The -02 will contain 2 surge tank pumps.
• The -03 will contain 3 surge tank pumps.

Ordering a fuel cell complete with FCST-X, filler, vent and level sender can be complex and requires several parts to be ordered. In order to make sure you order the correct parts that work together, click the banner below to use our configurator tool. This will ask you questions step-by-step to help you get each choice and at the end will allow you to add all of the items to your cart to see pricing and make your purchase.

HISTORY OF THE FCST

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. 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).

HOW IT WORKS

A lift pump scavenges fuel from the bottom of the fuel cell and pumps it into the 2L surge tank. Inside the surge tank canister, up to 3 EFI fuel pumps can be used to feed high pressure fuel to the engine. As shown below, fuel cannot pass between the 3 independent filtration chambers (A, B, C). If less than 3 pumps are installed, the empty port does NOT need to blocked off.

If the lift pump starves, the volume inside the surge tank canister will keep the surge tank pumps fed and the engine supplied with fuel. The return from the fuel pressure regulator is also routed to the surge tank canister to help keep it full.

There are 3 fill valves integrated to the bottom of the surge tank. These 1-way FKM fill valves are sealed shut unless the fuel level in the cell rises above the fuel level in the surge tank. If this happens, each fill valve opens and sends 355LPH of fuel (1065LPH total) into the surge tank until fuel level reaches an equilibrium. 

Excess fuel in the surge tank simply overflows back into the fuel cell. This dynamic sequence is all done inside the safety of a fuel cell.

PORTS AND FITTINGS

PUMP OUT, 8AN MALE
The fuel pump outlet port is signified by the "PUMP OUT" engraving. It uses 7/8"-14 threads making it compatible with all 10AN ORB fittings. The FCST-X comes standard with a common 10AN ORB to 8AN male adapter fitting. 

RETURN, 6AN MALE
The external "RETURN" port is used for low pressure fuel returning from the FPR. This port uses 3/4"-16 threads making it compatible with all 8AN ORB fittings. The FCST-X comes standard with a common 8AN ORB to 6AN male adapter fitting. 

VENT, 8AN MALE
The "VENT" port is tapped with 1-1/16"-12 threads making it compatible with all 12AN ORB fittings. The FCST-X comes standard with 20-0934 which uses a common 8AN male outlet fitting for standard fuel filling. However, 20-0535 can be purchased separately with a 12AN male fitting for quick fill dry break systems that require a high-flow vent.

SELECTING YOUR FCST-X

The different FCST-X part numbers are based on the brand/part of pumps that fit, and quantity of fuel pumps. When determining a fuel pump configuration, select a combination that can support the engine output. The lift pump is always matched to be the same style pump(s) found inside the fuel surge tank, with exception to the 20-1993-00 brushless Ti Automotive E5LM variation.

A FCST-X that states pump included comes pre-assembled with new fuel pumps and filters installed.

For a FCST-X that states pumps not included, fuel pumps must be sourced separately. A filter sock is only used for the lift pump as inlet filters are already supplied for the surge tank pumps. Also, there will be enough components included with this option to use up to 3 pumps in the surge tank. 

COMPATIBILITY
The FCST-X is compatible with all Radium Engineering fuel cells. In addition to our cells, they can also be installed into any cell that meets the following criteria

• The fuel cell must have the industry standard 6"x10", 24-bolt flange opening
• The opening must be on the top face of the fuel cell (i.e. not a side face)
• The cell depth must be at least 7.7" (196mm) measured from the outer top face to the internal bottom face.

• 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

• Anodized aluminum 6x10 plate
• Anodized aluminum surge tank pump hat
• Anodized aluminum lift pump hat
• Anodized aluminum service handle
• Anodized aluminum level sensor plate
• Anodized aluminum surge pump bracket
• Stainless lift pump mounts (shallow and deep)
• Lift pump and surge pump fuel filters
• Anodized aluminum 8AN roll over vent valve
• FKM refueling rollover protection seal
• FKM 6x10 24-hole sealing gasket
• 8AN ORB to 6AN male return fitting
• 10AN ORB to 8AN male pump out fitting
• 2AN ORB fuel level switch plug
• FKM 1-way fill valves (x3)
• Anodized aluminum acorn nuts
• Electrical wire ring terminals