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Mazda Motorsports Media Day

By Khiem Dinh

Khiem Dinh is an engineer for Honeywell Turbo Technologies at the time of this writing.  All statements and opinions expressed by Khiem Dinh are solely those of Khiem Dinh and not reflective of Honeywell Turbo Technologies.

For the better part of a decade, Mazda Motorsports has hosted a media day highlighting their racing activities.  They also bring out some pretty cool hardware from their racing history.  This year, the headliner of the show was the new SKYACTIV-D ('D' stands for diesel if you hadn't figured that out already) racing in Grand-Am.  Mazda Motorsports not only showcased the car, but also had Sylvain Tremblay of SpeedSource along with one of his engineers to do a tech deep dive.  Follow along to find out a few of the details on the new SKYACTIV-D power plant along with some gratuitous pictures of their other racing hardware.
 
Front and center was the SKYACTIV-D Mazda6 Grand-Am car.  Look beyond it though, and there's some really cool hardware back there.

 
How can you not love the Mazda 787 with the 4-rotor?  Check out the NACA ducts and air openings feeding heat exchangers down the driver's side of the car.  
 
A view of the driver's side from the rear shows the exit path of the air going through a heat exchanger.

 
A heat exchanger is mounted in the nose of the car with the air going through it being dumped over the top of the car.  Dumping the air on the top-side of the car should help reduce front-end lift.
  
The right side of the car has some other shenanigans going on with the exhaust exiting the side of the car before the rear wheel.

 

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Comments
Der Bruce
Der Brucelink
Tuesday, April 30, 2013 12:41 AM
That Skyactiv D is the embodiment of a sexy diesel at its best! Oh, and officially a winner as of now! I love how Mazda Motorsports said that with the Skyactiv D, they're at their 2 year goal after just 4 races.........hmmmm.......how about a project Skyactiv D this next year??????
VMax
VMaxlink
Tuesday, April 30, 2013 1:27 AM
@DerBruce

As said by you nice diesel, especially since its running a lower
compression than others like the TDI-engines thus reducing emissions that you`d normally have to treat with stuff like BlueTec. In the end saves weight and helps the environment without any loss of power compared to others. Well done!

Cheers!
VMax
VMaxlink
Tuesday, April 30, 2013 1:29 AM
^^ For the stock engine that is!
spdracerut
spdracerutlink
Tuesday, April 30, 2013 1:33 AM
@Vmax, the race engine runs an even lower compression ratio than the stock engine!
Dan DeRosia
Dan DeRosialink
Tuesday, April 30, 2013 6:13 AM
The green and white RX-7 was a Daytona 24 hours winner, fyi. The cutouts on the prototypes on the right side are exactly why you said - keeping the exhaust cool. Ducts on the GTO RX-7 door openings are for brake cooling - there was actually some CFD work on that since IMSA rules has them running with no windows anyway. Tube chassis car if it weren't obvious.

The Skyactiv-D engine is interesting to be sure. I miss the 3-rotor RX-8s though.
Rockwood
Rockwoodlink
Tuesday, April 30, 2013 10:04 AM
@ Kenku: 3-rotor RX-8s were the best sounding cars out there for sure.
warmmilk
warmmilklink
Tuesday, April 30, 2013 2:53 PM
so what car is that "stock" diesel engine offered in? just checked the Mazda website and they only list a gas engine for the 6... personally i'd be much more excited to car makes bringing over their diesel street cars than race cars
spdracerut
spdracerutlink
Tuesday, April 30, 2013 5:48 PM
@warmmilk, the 2014 Mazda 6 arriving this fall will have the 2.2L SKYACTIV-D.
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