Radium Releases Top-Feed Toyota 1JZ-GTE VVT-i & 1JZ-GTE non-VVT-i Fuel Rails

Radium Releases Top-Feed Toyota 1JZ-GTE VVT-i & 1JZ-GTE non-VVT-i Fuel Rails


Radium Engineering has reached a milestone of 20 unique fuel rail applications for popular import and domestic high performance engines with the release of its Top-Feed Fuel Rails for Toyota 1JZ-GTE VVT-i (PN 20-0268) and 1JZ-GTE non-VVT-i (PN 20-0235) engines.


Common Features of Radium's 1JZ-GTE Fuel Rails



Radium's 1JZ-GTE fuel rails allow for the addition of high flow aftermarket fuel injectors and deliver precision fitment to address the tight tolerances found in common aftermarket top-feed fuel conversion kits.

These extruded 1JZ-GTE fuel rails have a large 0.69″ internal diameter bore to supply massive fuel volume for high horsepower engines.  The rails are CNC machined from 6063 aluminum, black anodized, and laser etched for a high quality surface finish.

Both fuel rail kits are compatible with all fuel types including popular alcohol mixtures such as E85. The rails have three machined ports (2 end ports and 1 center port) that are tapped with 3/4″-16 female threads (-8AN ORB). The center port can be used as a feed, return, or auxiliary port for a fuel pulse damper or a fuel pressure sensor by using adapter 14-0119 (sold separately).


Top Feed Fuel Rail for Toyota 1JZ-GTE VVT-i



Radium's 1JZ-GTE VVT-i Fuel Rail (PN 20-0268) reuses the factory mounting spacers and mounting bolts. Its 11mm bore accepts the factory fuel injectors and compatible aftermarket high-flow injectors.

The OEM fuel pressure regulator can be reused with the addition of a -8AN ORB to M12x1.25mm fitting (PN 14-0285, sold separately), or it can be upgraded with Radium's adjustable Direct Mount Regulator (PN 20-0223-0X, sold separately).

This kit includes the anodized, laser-etched fuel rail, black anodized aluminum mounting feet and stainless steel mounting feet bolts.


Top Feed Fuel Rail for Toyota 1JZ-GTE Non VVT-i



Radium's 1JZ-GTE non VVT-i Fuel Rail (PN 20-0235) includes two different sets of mounting feet allowing various height fuel injectors to be used (validated injectors are available on Radium's website). The anodized aluminum mounting feet secure the fuel rail to the intake manifold by reusing the OEM Toyota thermal insulating spacers.
The fuel injector bores and the included CNC-machined billet aluminum press-fit injector seats are designed for 14mm injector O-rings. The seats include O-rings to prevent boost pressure leaks.

This kit includes the anodized, laser-etched fuel rail, tall and short black anodized aluminum mounting feet, stainless steel mounting feet bolts and a six-cylinder Toyota injector seat kit.


Stabilize Fuel Pressure with Radium Fuel Pulse Dampers



Hydraulic pulses from the fuel pump and the opening and closing of injectors can create undesirable pressure fluctuations and possible interference with injector flow. High performance vehicles running high fuel pressures, high flow injectors and boosted applications can be especially susceptible to fuel pulse issues. A fuel pulse damper works by allowing the volume of the fuel system to change slightly, providing the ability to absorb the pulses.
Radium Engineering has designed the first aftermarket vacuum-referenced fuel pulse dampers, FPD-R and FPD-XR, to ensure proper fuel pulse damping at elevated fuel pressures. This design maintains full damping function throughout the range of pressures seen in the fuel system.
Direct Mount Fuel Pulse Dampers:

  • 20-0176 FPD-R, -8AN ORB, for Base Fuel Pressure between 40-45PSI
  • 20-0177 FPD-XR, -8AN ORB, for Base Fuel Pressure Between 43-78 PSI


About Radium

Radium Engineering is located in Clackamas, Oregon. The company designs and manufactures innovative universal performance solutions including fuel surge tanks, catch cans and fuel pressure regulators, and application specific performance solutions ranging from fuel delivery to turbo systems. Radium-End Fuel Starvation.



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