New! Radium-spec Fuel Cells Now Available!

This product is available with or without a fuel cell. If you already have a compatible fuel cell and require only the surge tank assembly then simply add to basket. If you do require a fuel cell, please choose from option on the right. Further information on the different types at the bottom of the page.


Click Here to download installation instructions (PDF).

The Fuel Cell Surge Tank (FCST) is a fill plate replacement for popular fuel cells including ATL, FuelSafe, Pyrotect, Harmon, Jaz, etc. The FCST is designed for EFI vehicles experiencing fuel pump starvation issues while using a competition fuel cell. The FCST is NOT a glorified trap door box. It is the first of its kind to feature a true dual-chamber fuel tank utilizing a single lift pump and up to three surge tank pumps, all in a compact drop-in package.

The FCST also provides a quick and easy way to drop-in an upgraded fuel pump system for extra flow for vehicles with large power demand upgrades such as forced induction. Alcohol fuels such as E85, methanol, etc can be safely used.

CLICK HERE TO SEE AN IN-DEPTH LOOK AT THE FCST.

Shown below is a cutaway view of the FCST installed into a fuel cell:



The FCST's Integrated Surge Tank
The FCST uses the tried and true Radium Engineering fuel surge tank system preferred by professional motorsports teams worldwide. The optimized 2.2 liter canister supports 1, 2, or 3 internally mounted surge tank pumps capable of up to 1,350LPH @ 43psi.

The fuel pumps inside the surge tank provide the primary fueling to the engine. The "lift pump" mounts next to the surge tank canister and keeps the chamber filled with fuel. The volume of fuel inside the surge tank acts as a buffer to always keep the surge tank pump(s) supplied with fuel. This volume is also maintained by the "return" from the fuel pressure regulator. Excess fuel in the integrated surge tank bleeds out into the fuel cell without the need of an expensive hose and fittings. All of this is done inside the fuel cell with the FCST.

Below is a quick demonstration of how a basic fuel surge tank systems work.

The surge tank incorporates a multi-pin high amperage sealed electrical bulkhead connector that has 1 connector for each of the 3 selectable pumps. All internal wires are gasoline, ethanol, and methanol compliant. Furthermore, the internal tube and hoses are a special fluoroelastomer formulation that is suitable for submersion in all types of fuel.

The FCST Includes
-Radium 20-0146 Fuel Level Sensor Block-Off Kit
-Radium 20-0155 Fuel Cell Mounting Tab Kit
-Anodized Aluminum 6x10, 24-Bolt Fill Plate
-Anodized Aluminum 2.2 Liter Surge Tank Canister
-Anodized Aluminum Lift Pump Mounting Brackets
-Anodized Aluminum Surge Tank Pump Mounting Bracket
-Anodized Aluminum O-Ring Sealed -6AN Fittings
-Anodized Aluminum 3/4-16 (-8AN) Port Plugs x2
-Submersible Rubber Hose and Tubing for all Pumps
-24" External Wiring Harness for Surge Tank Pumps
-24" External Wiring Harness for Lift Pump
-Standard 6-Bolt 2.18" B.C. Flange, Fill Neck Not Included
-8AN Sized Vent Hole, Roll Over Valve Not Included
-Stainless Steel Hardware
-Installation Instructions

Selecting the FCST's Fuel Pump
The FCST is available with or without fuel pumps. Radium assumes that the lift pump and the surge tank pumps will be the same brand so the internal wiring connectors for the surge tank pumps and the lift pumps will always be the same.

If you are going to use your own pumps or source pumps elsewhere, select the option "Surge Tank Pumps and Lift Pump Not Included" from the drop down. Note that there will be enough components included with this option to use 1, 2, or 3 surge tank pumps. Depending on the setup, some parts will simply not be used. Next, select the type of pumps that will be used so the appropriate internal wiring connectors will be included in the kit.

If pumps are needed, the FCST will come preassembled and sock filters will be installed on all fuel pumps. First, select the preferred number of surge tank pumps that will be used from the pull down menu. The FCST is sold in 1, 2, or 3 surge tank pump configurations with 1 lift pump. Next, select the type of pumps that will be used so the appropriate internal wiring connectors will be included in the kit. Note that the surge tank pump's wiring harness is always configured to use up to 3 pumps even if only 1 surge tank pump is selected.

FCST Fittings Explained The anodized green fittings signify the surge tank fuel pump outlets to the engine. These are available in -6AN male only. If only 1 surge tank pump is used, the "PUMP2" and "PUMP3" ports are plugged using the included anodized aluminum port plugs. If 2 surge tank pumps are used, the "PUMP3" port is plugged using the included anodized aluminum port plug. If 3 surge tank pumps are used, the included anodized aluminum port plugs will not be used.

The "RETURN" black port fitting is used for low pressure fuel returning from the fuel pressure regulator. This port is tapped with 3/4"-16 threads and a -6AN male fitting is included. However, larger -8AN or -10AN male port adapter fittings can be purchased separately HERE if required.

FCST Parts Required
FUEL CELL
A fuel cell is not included in the FCST kit. However, a Radium fuel cell can be added to the order (see below for more information). The fuel cell MUST use a 6x10, 24-bolt fill plate flange. The fuel cell cannot be any shorter than 8 inches. The distance from the top of the fuel cell to the bottom of the lift pump filter (lowest point of the kit) is adjustable (8-11 inches depending on how the lift pump is mounted). If the fuel cell is deeper than 11 inches, use this Radium Fuel Pump Inlet Adapter to relocate the lift pump filter to the bottom of the fuel cell. For the ultimate in fuel starvation protection, the lift pump or pickup filter can be placed into the Radium Collector Box.

VENT VALVE The FCST uses a 3/4" (19mm) vent hole. If you dont currently have a roll over protection fitting, this Radium -8AN Vent Valve can be used.

FUEL FILLER If you do not currently have a 6-bolt (2.18" B.C.) filler, this Radium Fill Neck is unique in that it can be used for direct filling or remote filling.

Radium Fuel Cells
Radium Engineering has teamed up with Fuel Safe to offer a full line of Radium FCST-equipped fuel cells. These Radium-spec fuel cells are available with a choice of 4 different bladder types in many popular sizes. All Radium fuel cells feature a lightweight corrosion-resistant black powder-coated aluminum can which is an upgrade over the standard mild steel cans of the past. Anti-slosh foam is included inside the bladder to reduce sloshing and optimize the fuel collection of the lift pump. The fuel cells are delivered fully assembled with the FCST of your choice installed. All fuel cells are manufactured in the USA.



Race Safe Fuel Cells
These cells are compatible with all types of fuel (including popular alcohol blends such as ethanol). They feature a molded plastic bladder for those that are looking for a cost efficient cell and do not require a certified bladder. More information HERE..

Enduro Fuel Cells
FIA-FT3 CERTIFIED
These cells are compatible with all types of fuel (including popular alcohol blends such as ethanol). The bladder is contructed from molded plastic. More information HERE.

Sportsman Fuel Cells
FIA-FT3 CERTIFIED These cells are compatible with hydrocarbon fuels only (gasoline, diesel, AV gas). They feature a durable lightweight coated fabric bladder design. More informationHERE.

Pro Fuel Cells
FIA-FT3 CERTIFIED
These cells are compatible with all hydrocarbon fuels (gasoline, diesel, AV gas) and alcohol blends up to E85. They feature a coated fabric bladder is approved for use in all motorsports. More informationHERE>.

Flex Fuel Cells
FIA-FT3 CERTIFIED
These cells are compatible with all types of fuel (including popular alcohol blends such as ethanol). They feature a soft extremely conformable high strength lightweight coated fabric bladder. More informationHERE.



Important Notes:
-Allow 1-3 weeks for assembly and shipment of the fuel cell with the FCST.
-All Radium Engineering Fuel Cells are non refundable.
-It is highly recommended that all optional accessories (Fill Neck/Cap, -8AN Roll Over Vent Valve, Fuel Collector Box) are purchased at the same time as the fuel cell so that assembly can be completed before shipment.
-If customer is supplying their own pump(s), the fuel cell and surge tank will arrive partially assembled, final assembly by the installer will be required.

Radium Fuel Cells are used by professional motorsports teams and anyone else looking for the best in performance and safety.