Radium FHST, Mazda RX7 FD, Pumps Not Included, Walbro GSS342, AEM 50-1200

Integrated Surge Tank:
A fuel surge tank (FST) is the best solution in preventing fuel starvation. Because the FD RX7 can experience high lateral Gs, it inherently suffers from fuel slosh. Fortunately, Mazda manufactured a gas tank with a very large bolt flange pattern (similar to the FCST) permitting various upgrading options.

For a proper FST to function, a lift pump is necessary to maintain volume within the surge tank. This lift pump is located in the rear portion of the OEM sub-tank within the Mazda gas tank. Included in the kit is a lift pump mount that snaps onto 3 sides of the OEM sub-tank. It also serves as a baffle keeping the lift pump supplied with fuel. Measures were taken to ensure that the lift pump always has fuel to deliver to the surge tank.

The 1" check ball allows fuel into this tight area during acceleration and traps fuel in during deceleration.

The lift pump sends low-pressure (high-volume) fuel in the FST through a special deflector at the bottom of the surge tank canister. The 24-hole diverter evenly disperses fuel inside the canister preventing air bubbles and foaming. When a low demand for fuel is present, the canister will overflow back into the OEM sub-tank.

Pre-pump filters are included for proper inlet filtration.

Because all compatible fuel pumps utilize check valves, the high-pressure pump outlets merge into a single 10AN billet collector.

The returning low-pressure fuel from the regulator is sent back into the FST keeping it full. A second 24-hole deflector is used in this location further preventing air bubbles and foaming. All of this happens inside the OEM gas tank.

Features
-Drop-In OEM Replacement
-Permits 1-3 Surge Pumps plus 1 Lift Pump
-8AN Male Pump Outlet Fitting
-6AN Male Return Inlet Fitting
-Fuel Starvation Protection
-High Current Electrical Hardware
-Compatible with Various Pumps
-Anodized Aluminum Construction
-Gasoline and Ethanol Compliant
-Anodized Aluminum 8AN Male Fitting for Feed
-Anodized Aluminum 6AN Male Fitting for Return
-Anodized Aluminum 8.5mm Barb Hose Ends for OEM Feed/Return
-Anodized Aluminum Surge Tank Canister
-Anodized Aluminum OEM Fuel Sensor Mount
-Anodized Aluminum Lift Pump Baffle and Check Ball
-Fuel Resistant Submersible PTFE Tubing
-Fuel Resistant ETFE Insulated Wiring
-Stainless Electrical and Mounting Hardware
-Stainless Steel Mesh Triple Pump Filter

INCLUDES
-Fuel Filter (-03 Stainless, or -05 Microglass)
-Fuel Filter Heat Exchanger Bracket (Laser engraved graphics may vary)
-FD RX7 Fuel Filter Mount
-8AN PTFE Fuel Feed Hose
-Radium Fuel/PCV 1/2" Hose
-Black 8AN Adapter Fittings
-Black 8AN Hose Ends
-Stainless Steel Hardware

Free Shipping does not apply to some heavy items, for example: Wisefab & BC Racing are included for free shipping, NPC and some PWR are not included.

Shipping times may vary depending on your location, however the majority of packages are received within 3-5 business days of dispatch!

We dispatch 5 days a week, and aim to process all orders within 24hrs*

On weekends and public holidays, orders will be processed next business day.

*order processing may be delayed during sale events or holiday periods.

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