Oh Boyd That’s Quick – Boyd Racing Evolution X
V-mount intercooler/radiator setup with oil cooler in front
When space is at a premium, sometimes it pays to get bent. Or perhaps I should say slanty.

V-mount intercooler and radiator setups have been popular for a while now. They can allow better airflow through each cooling core, as long as ductwork helps force the air through the proper paths required for efficient cooling. In this case, those paths are through a JC Fabworks custom dual-pass radiator paired with a JC Fabworks intercooler built from a 22x11x4.5 Vibrant core. The smaller black cooler up front is a dual-circuit cooler and it is used to control engine oil and power steering fluid temperatures.

Trunk-mounted cooler and fans assembly
JC Fabworks has installed this additional rear-mounted oil cooler which has air ducted to it through the cabin.

The cooler utilizes dual fans mounted in a puller configuration to draw air through. The other end of the ductwork terminates at the windows of the rear doors, where it draws in fresh air.

View into NACA duct in rear passenger door lexan window
Here’s the view at the other end of that rear cooler’s ductwork, complete with a NACA duct to aid in getting the air through.


Low view of radiator v-mounted above splitter with ducts in the background
Modern electronically-controlled AWD drivetrains have a lot of moving parts, and none of them like heat.

Nestled behind the v-mounted radiator is a transmission cooler that helps keep temperatures managed. The Boyd Racing Evo’s transmission has been rebuilt by Jack’s Transmission using OEM gearing, with an Exedy flywheel and an Exedy triple-disc cerametallic clutch getting the power into it. Bill’s Englewood Driveshaft provided a custom aluminum stick to get power to the back wheels which are driven by a rear diff also rebuilt by Jack’s Transmission.

Hidden in the rear diffuser is a rear differential cooler.


Cooling duct hose passing through diffuser mount and into engine bay
Thermal management is omnipresent on the Boyd Racing Evo, and ducts can be seen everywhere helping guide air to its intended destination.

In this particular case, ductwork from the front bumper helps fresh air reach the brakes.


  1. You did get something wrong, there’s no apostrophe in Pikes Peak, it was universally accepted to remove it decades ago. Just kidding though, no haterade here. Cole builds some seriously badass stuff.

  2. Solid build! It’s obvious a lot of thought went into it. I especially approve of the turbine housing choice.

  3. Dang, it was going so well until the exhaust blown diffuser.

    The team need research the Coanda effect. Because they need to install a flat tapered exhaust tip. And it needs to be parallel to match the exact angle of the diffuser. On top of that, they need to reprogram the ECU so that it still has exhaust flow on throttle lift, or you will lose downforce during cornering, which is when you need it most.

    Also, the flow straighteners can be curved, so the air flow diffuses laterally, too. This is a very simple modification. Take a look at the F1 blown diffuser undertrays. It wasn’t that long ago that the EBD was state of the art.

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