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Radium S14/S15/R33/R34 Fuel Hanger Surge Tank Add-on For GSS342 Or AEM 50-1200 - Pumps Not Included - 20-0700

Radium S14/S15/R33/R34 Fuel Hanger Surge Tank Add-on For GSS342 Or AEM 50-1200 - Pumps Not Included - 20-0700

Regular price $399.95
Regular price Sale price $399.95
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This product is to be used with one of the fuel hangers above. It is recommended to use a single pump hanger to feed the surge tank. The surge tank can then be equipped with one or two fuel pumps to feed the engine.

The Radium Engineering FHST (fuel hanger surge tank) add-on is the ultimate solution for fuel starvation issues. Due to the saddle-bag style OEM fuel tank and insufficient baffling in late model Nissans, fuel slosh is common when driven aggressively. Unstable pressure resulting in a lean fuel mixture can cause engine damage. A stand-alone surge tank is an excellent device for eliminating fuel starvation issues, but installation can be complex. This add-on is a fully functional fuel surge tank mounted inside the OEM tank.

Simple plug and play connections are all that is required to attach the 2 systems together.

The surge tank can hold 1 or 2 aftermarket pumps including brushless variations. With the addition of the fuel pump in the OEM location, there could be 2-3 pumps inside the gas tank (total). Even with all of the extra fuel pumps, the FHST system is very straight forward and relatively simple to install.

No grinding, bending, or modification of the vehicle is required. Furthermore, the system is compatible with all alternative fuels such as E85.

What keeps the surge tank full?
The surge tank fuel pump(s) are supplied with fuel from 4 different sources:

  • The high flow (low pressure) fuel pump located in the OEM location.
  • The fuel returning from the fuel pressure regulator (FPR).
  • The fuel transfer from the integrated venturi jet pump siphon.
  • The 355LPH one-way fill valve on the bottom of the surge tank.
External high current fuel pump wiring is provided for installing one FHST pump (1 relay, 1 fuse, and all associated wiring and hardware). To wire in a second FHST pump, a second fuse and relay are required. Consider purchasing Radium 17-0031 DIY Wiring Kit

Because the fuel pump supplying the FHST (in the original pump location) will now operate at very low pressure (high flow), the OEM external fuel pump wiring will be sufficient for this "lift" pump.

FHST Add-on Features:
  • Simple Integration into Fuel Hanger
  • Fuel Starvation Protection
  • Anodized Aluminum Construction
  • Permits 1 or 2 Surge Pumps
  • Brushless Fuel Pump Compatibility
  • High Current Electrical Hardware
  • Gasoline, Methanol, and Ethanol Compliant
  • Stainless Steel Hardware and Clamps
The Fuel Cell Surge Tank is a drop-in fuel pump system for Radium Engineering's popular fuel cells or any cell that uses the industry standard 6x10 24-bolt fill plate bolt pattern. The FCST is designed to protect EFI vehicles that experience fuel starvation. It is NOT a glorified trap door box with baffles. It features a true dual-chamber fuel tank utilizing a single lift pump and up to 3 surge tank pumps all packaged inside the fuel cell. It provides all the benefits of a traditional external fuel surge tank without safety concerns and plumbing complexity.

The 20-0693-00 Fuel Cell Surge Tank is only available without pumps included. It is designed to use one or two Ti Automotive E5LM brushess fuel pumps inside the surge tank. A standard brushed pump is used as a lift pump.Ti Automotive E5LM brushless fuel pumps can be purchased HERE, but will not be installed by Radium Engineering. Assembly must be performed by the installer.

The lift pump electrical and plumbing is set to be compatible with Walbro F90000267/274/285/295 fuel pumps. Radium Engineering recommends the Walbro F90000295 as a lift pump for maximum flow with a 14-0143 Filter Sock. Filter socks are required for all pumps.

Pumps Not Included

Ti Automotive brushless fuel pumps do not have integrated check valves like many other pumps.

So this FCST includes two 20-0598 fuel pump outlet adapter check valves. Because the 2 surge tank pumps merge into a single outlet collector, these high flow 1-way valves permit multiple pumps to be staged without backflow.
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