FCST-X, Fuel Cell Surge Tank with Brushless Ti Automotive E5LM

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.

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. However, various 10AN ORB adapter fittings can be purchased separately HERE.

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. However, various 8AN ORB adapter fittings can be purchased separately HERE.

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.

INCLUDED:

One Walbro F90000274 Pump

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