Radium Fuel Hanger Surge Tank No Pumps Walbro GSS342 AEM 50-1200 for 370Z Z34
OVERVIEW
The Radium Engineering FHST (fuel hanger surge tank) is the ultimate solution for fuel starvation issues in the Nissan Z34 chassis. Due to the saddle-bag style OEM fuel tank and insufficient baffling, fuel starvation is common when the vehicle is driven aggressively, such as on a track. This results in unstable fuel pressure and possible engine damage from running too lean. A stand-alone surge tank is an excellent device for eliminating fuel starvation issues. But installing a stand-alone FST is difficult in the 370Z due to the open-cabin design, and lack of a firewall between the driver and the rear of the vehicle. So Radium Engineering chose to create a fully functional fuel surge tank INSIDE the OEM tank.
The Radium FHST can be used with 1 or 2 aftermarket pumps and supplies 1:1 regulated fuel to the engine. No grinding, bending, or modification of the vehicle's sheet metal is required. Furthermore the system is compatible with alternative fuels such as E85.
Features
-Drop-In Installation
-Permits 1 or 2 Surge Pumps
-Integrated 1:1 Adjustable Fuel Pressure Regulator
-Fuel Pressure Gauge
-Fuel Starvation Protection
-High Current Electrical Hardware
-Compatibility with Popular Fuel Pumps
-Anodized Aluminum Construction
-Gasoline, Methanol, and Ethanol Compliant
-Fuel Resistant Tubing and Wiring
-Stainless Steel Hardware
HOW THE FHST WORKS
The OEM fuel module contains the pump, fuel pressure regulator, filter and has 2 venturi jet pumps that draw fuel from both sides of the tank. However, the OEM fuel module still suffers from slosh resulting in an interruption of the engine's fuel supply.
The Radium FHST is the best solution in preventing fuel starvation. It installs in the opposite side of the fuel tank from the OEM fuel module and works with the OEM module to keep fuel delivery consistent in all conditions.
The FHST pump(s) are used to deliver fuel to the engine through an integrated fuel pressure regulator.
As described below, the pump(s) inside the FHST are supplied with fuel from 3 different sources: the pump in the OEM fuel module, the integrated fuel pressure regulator return, and 355LPH one-way fill valves on the bottom of the collector box that allows fuel in, but not out.
This ensures that pump (or pumps) feeding the engine are always supplied with fuel, even in extreme driving conditions.
1. The OEM venturi system must be used with the Radium FHST.
2. The kit includes an AEM 340 LPH pump that must be installed in the factory fuel pump hanger.
3. The OEM fuel module must be upgraded to a pump with at least 340LPH (@ 40psi) rated flow in order for the venturi system to work correctly.
4. Do NOT modify the OEM FPR or OEM venturi jet pump. Starvation will not prematurely occur, but the fuel may distribute unevenly in the tank, causing inaccurate fuel level readings.
5. This system cannot be used as a traditional "return" style system using an external regulator.
INTEGRATED FUEL PRESSURE REGULATOR
Because the Nissan fuel system is "returnless", forced induction tuning can be problematic when a 1:1 fuel to boost pressure ratio is not possible. Like the OEM setup, a fuel pressure regulator (FPR) is integrated into the Radium FHST. The difference is the regulator is externally mounted with an adjustment screw and a vacuum port. If an intake manifold vacuum hose is connected, the FHST's built-in fuel pressure regulator will operate at a 1:1 ratio permitting fuel pressure to proportionally increase with manifold (boost) pressure. Conversely, the vacuum port can remain open to atmosphere and pressure will remain constant (like OEM).
NOTE: The Radium integrated regulator should be the only FPR in the fuel system.
PLUMBING
To clear the OEM LH cover plate, the 8AN ORB threaded feed port and 6AN ORB threaded inlet port feature pre-installed low profile 6AN male fittings. While the pump "OUT" fitting can always be changed (if necessary), the FHST "IN" fitting cannot be changed. The "IN" fitting incorporates a unique component that is required for the venturi system to work properly.
Sock filters are used on all fuel pump inlets. And because the FHST does NOT eliminate the low micron OEM post pump filter, a downstream aftermarket filter is recommended, but not required.
ELECTRICAL
The custom designed stainless electrical studs easily handle the high current demand that compact multi-pin bulkhead connectors lack. These serviceable connections are hermetically sealed and impervious to all standard and exotic fuels. Non conductive anodized aluminum acorn nuts are provided to prevent any accidental short circuiting. Electrical hardware is included for the fuel pump(s) and OEM level sender. Furthermore, the in-tank wiring is insulated with high quality chemically resistant ETFE.
1. "No Pumps Included"-This kit includes 1 relay, 1 fuse, and all associated wiring and hardware to install 1 surge tank pump.
2. "1 Pump Included"-This kit includes 1 relay, 1 fuse, and all associated wiring and hardware to install 1 surge tank pump.
3. "2 Pumps Included"-This kit includes 1 relay, 1 fuse, and all associated wiring and hardware to install 1 surge tank pump.
PUMP COMPATIBILITY
Brushed and brushless fuel pump options are available for the Radium 370Z FHST. The system is suited, but not limited, to the following fuel pumps:
- Walbro F90000267 E85
- Walbro F90000274 E85
- Walbro F90000285 E85
- Walbro GSS342
- AEM 50-1200 E85
- Ti Automotive BKS1000 (Brushless)
- Injector Dynamics BPC-1100 (Brushless)
PUMP CONFIGURATION
If supplying your own pumps, select the option "No Pumps Included" from the menu. Make sure you are selecting the correct option for the style of pumps you plan to install. This ensures the correct electrical connectors and other small parts are included. When purchasing "No Pumps Included", the kit will come partially assembled and there will be enough components included to run one or two surge tank fuel pumps.
Configurations with "Pumps Included" will come pre-assembled and ready to install.
INCLUDED
The comprehensive kit includes all parts necessary to complete the installation including a pressure gauge, external fuel hose, fittings, electrical fuse, relay etc. All kits with "Pumps Included" come with an AEM 340LPH pump (shown below) that is to be installed in the OEM fuel module.
| Manufacturer Part Number: 20-0820-00 | Brand: Radium |