Radium Engineering Universal Fuel Surge Tanks

Single pump fuel surge tanks (FST) suit builds running one in-tank style pump within the surge canister. Multi-pump surge tanks (MPFST and the regulated MPFST-R) are intended for higher demand applications where more than one pump is used. Fuel cell surge tanks such as the FCST-X integrate the surge function into the cell itself, while the FSTR RA includes an integrated fuel pressure regulator. Related items such as mounting brackets, bulkhead fittings and O-ring service kits are listed separately in the wider Radium fuel range.

These tanks are universal rather than chassis specific, so selection is based on your fuel system rather than a chassis code such as CZ4A, ZN6, S15 or JZA80. Consider the number and type of pumps you intend to fit, the port sizes (commonly AN ORB), whether you need internal regulation, and the physical space available for mounting. If you are pairing a surge tank with a vehicle specific install kit, check that the kit is listed for your model and variant before ordering.

Fitting a surge tank generally involves secure mounting, feed and return plumbing in AN hose or hard line, suitable fittings, fuel pump wiring and a means of venting or returning fuel to the main tank. Work with the fuel system depressurised, in a well ventilated area away from ignition sources. Installation by a professional is recommended, and any fuel system modification should comply with applicable Australian regulations.

Do pumps come included? Pump inclusion varies by part. Check the individual product listing for what is supplied.

Is a separate regulator required? Some models, such as the regulated MPFST-R and FSTR RA, include regulation; others rely on an external fuel pressure regulator.

Are these suitable for E85? Radium publishes fuel compatibility for each product, so refer to the listing and manufacturer documentation for the model you are considering.