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


With the core components defined it's time to start getting everything put together.

Here is one of the Aeromotive 340 Stealth fuel pumps installed to the top and bottom caps of the Radium fuel surge tank. If we ever decide to go completely overkill (or want to run E85) there is room inside to install a second feed pump in parallel.

The fuel surge tank is being installed in the hatch area of the RX-7. Since there are no factory mounting provisions for an external fuel surge tank we had to create our own. This is very easy with the right tools…drill the correct size hole, load a M6 threaded insert to the rivet nut setter tool, install the insert, and unthread the tool from the insert. Choosing the mounting location for the fuel surge tank on the other hand was more of a chore than it should have been. 

The Radium fuel surge tank installed in the rear hatch area using the threaded inserts and M6 flanged bolts.

Rinse and repeat with the drill and rivet nut tool for mounting the Aeromotive fuel filter. It is important to keep flow direction in mind when mounting inline filters.

Overall shot of the fuel system before any tubing and hoses are fabricated. Notice the bulkhead fittings installed through the floor of the hatch area. These will help bring fuel to and from the engine and fuel tank while keeping the cabin as sealed as possible.

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