Project [Rotary] FD RX-7: Part 3 – Fuel System (Chassis Side)


Moving to the factory fuel tank, several changes are needed to install the Aeromotive 340 Stealth lift pump and get fuel to the Radium fuel surge tank. Part of these changes means significant modifications to the factory pump hanger.


The factory fuel pickup assembly consists of 5/16″ ID fuel hose and those extremely aggravating spring hose clamps. The hoses with the white check valves on the left and right of the feed/return hoses are fuel tank vent hoses. The charcoal canister and purge control valve have been removed, but the vent hoses will remain.

The factory pickup assembly disassembled and ready for modifications. 

The freshly modified pickup assembly. The original tubes have been cut off and 90-degree -6AN bulkhead fittings have been installed through the top plate with PTFE washers to prevent any leaks. A piece of the stock 5/16″ OD pickup tube is attached to the center bulkhead via a compression fitting, while the return is a new piece of flared 3/8″ stainless tubing.

Aeromotive 340 Stealth fuel pump wired and installed to the pickup assembly. The rubber sleeve is used to damp out the potential noise and vibrations from being mounted directly to the steel hanger. Non-insulated crimp connectors and fuel-resistant heat shrink tubing are used to connect the Aeromotive pump harness to the factory connector. The fuel level sensor and wires were intentionally omitted from this photo to better show the modifications and new fuel pump, but were reinstalled soon after.

Aeroquip Startlite hose and reusable hose ends are used again for this part of the build. These extremely short hose assemblies attach the bulkhead fittings in the fuel tank to the fittings in the chassis.

Modified pickup assembly reinstalled to the fuel tank and the hose assemblies installed between the bulkhead fittings.

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