Fixing the GD WRX Fuel System with Radium Engineering and DeatschWerks

Next, the supplied ring terminals are crimped in place.   Heat shrink tubing is shrunk onto the ring terminals to help assure that they cannot short out.

Now the various ring terminals are ready to be installed on their related terminals on the Radium hanger.

If we were going to just run a single 340lph pump we would be done but the electrical load of our duel pump system is more than the stock power wiring can safely handle so we are going to make up some heavy gauge wiring and run straight to the battery and switch the pumps via a relay that is controlled by the OEM pump controller.

Now our fuel system is up to the demands of our stroker, long rod, 2.2-liter engine.  More to come as our car gets closer to completion.


Radium Engineering




  1. While it was not explicitly stated in your article, ensure you are using correct heat shrink for anything submersible. Stuff like Raychem DR25 is not ethanol/methanol safe.

  2. I like the idea and intension of the catch tank part, find it a bit small comparing to the double 340l/h pumps. On this size ist empty in les than 3 sec acceleration.
    Have you measured the restriction of the 7mm fuel lines with the two pumps tunning at idle? Normally with one pump at idle you increase it by 0.6-0.8bar at the pump compared to the fuel rail.
    Also the oem wiring was made for 6-8Amp pumps, these with the increased pressure are sucking on boost about double making 2volt drop in voltadge so loosing about 30% flow and heating the wire.

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