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Project FD RX7 Restomod: Part 29 – BRJ Radiator, GC Cooling Fans, and Hayden Auto Power Steering Cooler

  • Billy Johnson

FD RX-7 coolant line fabrication for BJR 56mm radiatorWe took some 1.5” aluminum to start fabrication on the radiator hard lines.

Fabricating coolant lines for FD RX-7We marked up the angles that we needed to make the radiator lines and started fabricating.

Fabricating upper radiator line for BJR FD RX-7 RadiatorThe upper radiator hose is pretty simple with a 90* bend and a shallow ~35* transition to get the angle right into the Raceonly AST Delete.

Rolling bead for radiator hose TSR FabricationWe then rolled a bead to each end of the line.

Upper Coolant Hose for BJR FD RX-7 radiatorWith both ends beaded, we were ready to finish weld the line.

Lower coolant line for BJR FD RX-7 RadiatorThe radiator lines were finish welded by Mario of TSR Fabrications.

Previous page 1 2 3 4 5 6 7 8Next page
Related Topics
  • fd3s
  • Hayden Automotive
  • Hayden Oil Cooler
  • oil cooler
  • raceonly
  • radiator
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  • fd rx7
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  • GC cooling
  • Radiator fan
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5 comments
  1. James says:
    June 30, 2025 at 6:01 am

    Fantastic update and all the custom work on the cooling system is so cool to read about. I am patiently waiting to see this thing finally unleash some HP!

    Reply
  2. Bob says:
    July 3, 2025 at 2:30 am

    Technically, you should have a ‘blade’ that bifurcates upper, and lower flows at the start of the duct. If you modeled this in CFD, there would be obvious turbulence that could easily be avoided.

    Cheers.

    Reply
    1. Jean-Nicholas says:
      July 12, 2025 at 4:32 pm

      Was about to comment the same thing.
      Also, the air out of the IC needs to go somewhere… I don’t remember what the hood looks like for this project, but a proper vent with gurney flap and ducting would do wonders at speed.
      Can’t wait to read the next articles.

      Reply
    2. Billy Johnson says:
      July 13, 2025 at 11:15 am

      It’s not that crucial to bifurcate the ducting. Many morern OEM cars don’t separate the inlet ducting of a common duct/plenum that feeds multiple heat exchangers because airflow is not laminar in the ducting and the important aspect here is creating a pressure differential across the heat exchangers. Proper ducting that seals the air from the front bumper to the heat exchanger creates a high pressure area on the front side of heat exchangers in the V-mount setup (or “L”-mount in many OEM applications) when using a common plenum (or air box, or radiator ducting).

      Reply
  3. David White says:
    March 31, 2026 at 12:45 pm

    I am currently in my FD build and would love to have one of these radiators, could y’all please guide me in the right direction to purchase one if they are available. I left a message on the BJR site to no avail. HELP…..someone??

    Reply

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