Project [Rotary] FD RX-7: Part 6 – V-Mount Cooling System (Overview and Intercooler)


With the intercooler tubing completely welded and bead rolled we were able to connect the intercooler to the engine. HPS 4-ply silicone hose couplings and T-bolt clamps were used to secure everything in place.

Though the intercooler setup is basically complete at this point, it seemed like a good time to go ahead and install the Turbosmart Race Port blow-off valve since it is the last turbo related component that needs to be installed.


The Turbosmart Race Port blow-off valve is a top-tier race component used on many professional race cars. One major benefit is that Turbosmart offers versions of their Race Port with different flanges. For example, part# TS-0204-1104 – FEMALE FLANGE can be mounted to the same flange as the TiAL 50mm blow-off valves so installing one to an existing TiAL configured system couldn't be easier.
Here we bored a hole in the side of our Greddy cast aluminum intake elbow for the Turbosmart Race Port flange. The hole was sized so that the flange would sit inside the bore. This made the interface between the two components extremely tight for a better fillet weld and decreased the distance the blow-off valve extends off the side of the pipe. 
This picture should show why decreasing the installed height of the Turbosmart blow-off valve was a good thing. We nestled it right in between the strut tower and the brake master cylinder. This is about as close as it's going to get to the throttle body without interfering with another component.
All components from today's build are now installed and what do you know, the RX-7's engine bay is finally starting to look complete.
Top down view of the intercooler setup shows just how short the intercooler piping is on this car. It's also nice to see that we still have plenty of room for the air intake and cooling components that we will be covering in the second half of the V-mount cooling system build. It's been a long time coming, but it's starting to feel well worth it.



Garrett Turbochargers
Vibrant Performance




    1. Hope…yes. How much? Not a lot for something soon. Long story short, I moved 2 years ago and the car was in a storage unit in a different state until 2 months ago. Finally have it with me, but currently have very little time to work. The project is still alive, just no where near the top of the priority list at the moment. Keep checking back and you’ll see something eventually :).

  1. Hi There,

    Very nice Build!

    I was wondering if you intercooler set up was going to be made available for purchase? or if I was able to purchase some cooler end caps from you.



  2. KISS. What are you building the car to do. looks like you have too much time and money, making the car
    look flash but never driving it. looks like you don’t understand the RX-7.Sure there are shortfalls but all with much more cost effective solutions. and yes i do know what i’m talking about. Over 20,000 racing km’s beating factory backed Porsches. NO D.N.F.

  3. I agree with KISS typically, but a 13B-REW sequential turbo probably isn’t going to be competitive in modern day time attack racing, which is what the car was originally being built for. Trying to keep a 450-500hp 13B happy without significant changes to the cooling system (oil, air, and water) is going to be very tough.

  4. Sorry , Not trying to put you down, The car looked more like a show and dyno car. My experience is 450 hp tarmac rally car with competition from Germany backed Porsche 993 turbo 996 turbo . You are right you will have to
    modify a few things and if you are serious about time attack maybe not the right place to discuss. i had to develop the car from scratch and was selling parts to mazdaspeed japan at one point and made quite a few mistakes along the way as well , I can see a few things that could help done different. I’m in Australia and no longer race these cars but will defend their underestimated ability i will shut up now . This is your project,

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