Radium FCST-X Fuel Cell Surge Tank Suit External Fuel Pumps

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).

COMPATIBLE WITH MY FUEL CELL?

To install a Radium Engineering FCST-X into a fuel cell, the following criteria must be met:

1. The fuel cell must have the industry standard 6"x10", 24-bolt flange opening.
2. The opening must be on the top face of the fuel cell (i.e. not a side face).
3. 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. 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.

STANDARD 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.

WHAT ELSE IS NEEDED?

FUEL CELL

• A fuel cell is NOT included with the FCST-X. The fuel cell MUST use a 6x10, 24-bolt fill plate flange. The distance from the outer top face to the internal botton face must be at least 7.7" (196mm). The distance from the top of the fuel cell to the bottom of the lift pump filter (lowest point of the kit) is adjustable. However, if the fuel cell is deeper than 9" (229mm), click HERE.

FUEL FILLER

• The FCST-X fuel filler pattern uses a 3-bolt (59.5mm P.C.D.) flange. Radium Engineering has them for both direct filling and remote filling.

VENT HOSE

• A hose and/or filter must be connected to the "VENT" port fitting. For compatible vent kits and more information on how these are plumbed and routed, go HERE.

SELECTING YOUR FCST-X

The different FCST-X part numbers are based on the brand 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.

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. Fuel pump compatibility is listed below.

20-1990-00

This FCST-X does not include fuel pumps. It can hold up to 3 surge tank pumps and 1 lift pump of the following.

• Walbro GSS342
• AEM 50-1200
• Deatschwerks DW440*

*Use the electrical connector provided with the pumps.

20-1991-00

This FCST-X does not include fuel pumps. It can hold up to 3 surge tank pumps and 1 lift pump of the following.

• 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).

20-1993-00

This FCST-X does not include fuel pumps. It can hold up to 2 surge tank pumps and 1 lift pump of the following.

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.

20-1995-00

This FCST-X does not include a fuel pump for the lift pump. It is compatible with the following.

LIFT PUMP COMPATIBILITY

• Walbro F90000267
• Walbro F90000274
• Walbro F90000285
• Walbro F90000295

There are two 80u (micron) filters included for two 10AN (5/8") pickups. If using the provided 16AN (1") pickup, an external filter will need to be purchased.
The surge tank can be configured to use any combination of the following: 

SURGE TANK COMPATIBILITY

• (1x) 10AN pickup for an inline external pump or mechanical pump.
• (2x) 10AN pickups for an inline external pump and/or mechanical pump.*
• (1x) 16AN pickup for an inline external pump or mechanical pump.
• (1x) 16AN pickup and (1x) 10AN pickup for an inline external pump and/or mechanical pump.*

*An electric pump can be used to prime a mechanical pump (for faster engine starting) when running 2 of the pickups.
 

OPTIONAL ACCESSORIES

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. 

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. 

Product 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 
   

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
• 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)
• Lightweight surge tank with increased volume
• 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

Included Components:

The following comes standard with every FCST-X variation

• 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

Links for compatible fillers (not included), Direct Mount or Remote Mount

• We endeavour to ship all regular and stocked items on same day, next day or within 5 business days of your order being placed
• Custom orders may take longer than regular shipping times but will have information about shipping time on the listing
• We take extra care in packaging your orders to ensure you quality parts arrive safely
• PRP accepts no responsibility for damage or loss to items/products/services from courier or shipping companies once we have received receipt for the third-party service
• All Items purchased from PRP are to be installed by a qualified mechanic at a licensed workshop
• Modifying your vehicle is illegal in some states and territories, the customer acknowledges that it is their responsibility to abide by the law and take the appropriate measures to ensure that their vehicle is roadworthy
• PRP assumes no responsibility for any work carried out, modifications made or parts supplied with regards to road use, as all our products are intended for track use only

Refund requests will be reviewed case by case. Due to numerous factors including automatic & immediate 3rd party supplier purchase orders & merchant fees imposed on us, you might be liable to cover an unavoidable restocking/cancellation fee of ≥ 5%. Please review your purchase and consider contacting us for an ETA before placing an order. If your order is for a gearbox, specific turbocharger, engine build, manifold or something generally not in our extensive inventory, this restocking fee is based on the supplier and not dictated by PRP.

• Effective September 2024, refunds will not be provided for change of mind, incorrect choice or custom ordered products.
• Exchanges or refunds for items and customers that are categorized and applicable under the Australian Consumer law, requires the product/s remain unused and returned in original packaging in saleable condition at your expense to our HQ in Australia. They must return in reasonable time. PRP justifies reasonable to 60 days from date of purchase.
• If items are damaged due to courier or otherwise neglect outside of your or PRP's control, you must notify PRP within 14 days of receipt or the claim is void.
• Platinum Racing Products is not liable for refunds or replacements due to lost or stolen property. We will however attempt every effort to assist in the recovery of your goods.
• We reserve the right to offer you a full or partial refund which can be applied over staged or full payment/s within a 30 day period. 
• You agree that if you select "Authority to Leave" or similar, you waive the liability from the shipper (as per their line agreement) and Platinum Racing Products. As such, we strongly suggest sending your package to an address where someone will be available to sign for the goods and keep them secure.
• Anodizing is done in house with state of the art equipment and we hold stock of most popular colour's. We anodize generally within 48hrs. No refund nor partial will be provided if your request is inside the 48hr period and you require urgent parts however we will always do our best to meet your needs.
• There is no partial or full refunds on shipping where factors are outside of PRP's control. Any shipping estimates are to be considered estimates only.
• Silicone Hose Kits: Please note that our silicone hoses have been designed and tested for the vehicle models mentioned. They may fit other vehicles with the same engine model, however the purchase and installation is at your own risk. Due to extensive model changes throughout the years, we are unable to supply or customize hoses in alternative lengths or sizes beyond what is offered. The kits might not contain every hose you want, but we have made every effort to include the series changes to cover the majority of needs. This means we might include hose/s that don't suit your series as a bonus. We strongly advise that you carefully review all photographs provided before making your purchase. PRP does not offer refunds or partial refunds for hoses that are not included in the kit unless they are explicitly shown in the photographs and missing from your delivery.

Warranty Policy

• Warranty is for a full refund or exchange provided the item was purchased through PRP or one its approved resellers or workshops.
• Warranty is void if you tamper with products or bring them back in a different state to which they were sold to you.
• Warranty does NOT cover costs of shipping to and from in any circumstance.
• All Items/Products/Services purchased from Platinum Racing Products are to be installed by a qualified mechanic at an approved workshop and ALL warranty claims are dependent on proof of appropriate installation and verification of failure.
• Modifying your vehicle is illegal in some states and territories, the customer acknowledges that it is their responsibility to abide by the law and take the appropriate measures to ensure that their vehicle is roadworthy.
• Platinum Racing Products assumes no responsibility for any work carried out, modifications made or parts supplied with regards to road use. All our products are sold and intended for track use only.
• Lifetime warranty refers to certain Platinum Racing Products branded components and generally does not include 3rd party suppliers and their parts. Manufacturer warranty applies to items including but not limited to alternators, turbochargers, electrical sensors, ECUs and associated parts, tyres, etc.
• Due to customer and external components not supplied by PRP, flat drive oil pumps and components are limited to 1 yr warranty with specific cases reviewed before honoring. Spline drive will remain to have lifetime warranty, but again only after specific review.
• All refunds and warranty claims are based on back to base review and parts will need to be returned to HQ for assessment unless otherwise arranged.