Radium Fuel Hanger Surge Tank Add-On - Nissan 200SX S14, S15/Skyline R33, R34

Radium Fuel Hanger Surge Tank Add-On - Nissan 200SX S14, S15/Skyline R33, R34

Application: Nissan S14/S15 Silvia, 200SX, 240SX and R33/R34 Skyline – all models/trims, RHD and LHD
Part Type: Fuel hanger surge tank (FHST) add-on for Radium late Nissan fuel pump hanger
Part Number: 20-0700, 20-0701

The Radium FHST Add-On is an optional upgrade for the Radium late Nissan fuel pump hanger, designed to stop fuel starvation. The saddle-bag style OEM tank in these Nissans has limited baffling, so fuel slosh under aggressive driving can cause unstable fuel pressure and a lean condition. The FHST is a fully functional surge tank mounted inside the OEM tank, using plug-and-play connections with no grinding, bending or vehicle modification. It is compatible with E85.

Radium recommends feeding the surge tank with a single-pump hanger. The surge tank holds one or two pumps (including brushless), so with the pump in the OEM location there can be two or three pumps in the tank in total. The surge tank is kept full by four sources: the high-flow, low-pressure pump in the OEM location, fuel returning from the fuel pressure regulator, the integrated venturi jet pump siphon, and a 355 LPH one-way fill valve on the bottom of the surge tank.

Key Features

• Fuel Starvation Protection: In-tank surge tank keeps the feed pump(s) supplied
• Simple Integration: Plug-and-play connection to the Radium hanger
• 1 or 2 Surge Pumps: Brushless pumps supported
• Four-Source Fill: Lift pump, FPR return, venturi jet pump and 355 LPH one-way fill valve
• High-Current Electrical: Wiring for one FHST pump included
• Construction: Anodised aluminium with stainless steel hardware and clamps
• Fuel Compatibility: Petrol, methanol and ethanol (E85)

Available Configurations

• 20-0700: suits Walbro GSS342 (255 LPH), AEM 50-1200, AEM 50-1230 and 50-1235
• 20-0701: suits Walbro F90000267, F90000274 and F90000285 E85; Walbro F90000295 and Ti Automotive E5LM also listed by Radium with check valve notes (see below)

What's Included

• Anodised aluminium FHST mounting bracket
• Anodised aluminium surge tank canister and top cover
• Pump clamps
• DIY wiring kit for one fuel pump (relay, fuse, wiring and hardware)
• Fittings and hose for installation
• Fuel pump harnesses (x2)

Optional Parts

• Radium Fuel Pump Hanger - Nissan 200SX S14, S15/Skyline R33, R34 (20-0630-00 / 20-0632-00) – required – the matching Radium hanger for your pumps
• Radium Fuel Hanger Plumbing Kit w/Filter - Nissan S14 S15 Silvia / R33 R34 Skyline (20-0702-03 / 20-0702-05) – feed/return plumbing and filter from the hanger to an aftermarket rail
• Radium DIY Fuel Pump Hard Wiring Kit (17-0031) – second fuse and relay for a second FHST pump
• Radium Engineering Check Valve - 6AN ORB to 8.5mm Barb (20-1533) – for pumps without a check valve (AEM 50-1230/50-1235), one per pump
• Radium Engineering Check Valve - 6AN ORB to 10mm Barb (20-1534) – check valve required for some 20-0701 pumps, one per pump
• Radium Engineering Pump Outlet Adapter - Check Valve with 10mm Barb (20-0798) – fit to an F90000295 or E5LM lift pump to stop the surge tank draining back

Important Notes

• Requires a Radium late Nissan fuel pump hanger (20-0630-00 with 20-0700 pumps, 20-0632-00 with 20-0701 pumps) – not included
• Fuel pumps not included
• A second FHST pump needs a second fuse and relay (Radium 17-0031); the OEM external pump wiring is sufficient for the lift pump, which now runs at low pressure and high flow
• Pumps without a check valve (AEM 50-1230/50-1235) need Radium 20-1533 on the hanger top, one per pump
• Some 20-0701 pumps need Radium 20-1534 (one per pump, not in the lift pump position)
• If a Walbro F90000295 or Ti E5LM is used as the lift pump, fit Radium 20-0798 to stop the surge tank draining back through the pump and causing long cranking times
• Installation instructions are available in the Instructions tab

Vehicle Fitment

• Nissan S14 Silvia / 200SX / 240SX – all models/trims, RHD and LHD
• Nissan S15 Silvia / 200SX – all models/trims, RHD and LHD
• Nissan R33 Skyline – all models/trims, RHD and LHD
• Nissan R34 Skyline – all models/trims, RHD and LHD

Not sure if this suits your vehicle? Email sales@coore.com.au and our team will confirm fitment.