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| This is Mazda’s Skyactiv-D Diesel engine. It uses a 2-stage turbo setup common on diesels which requires a good number of actuators to control all the valves. We covered some info on this engine a while ago in our inside look at Mazda’s Skyactiv D – Diesel Technology article. |
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| Notice something different between this diesel and the Audi/VW diesel? Well, besides the fact it has two turbos instead of one… Mazda doesn’t use a SCR catalyst on this diesel to reduce NOx! So one less catalyst and no requirement for urea injection. How did Mazda do it? They use a compression ratio of 14.0 which is low for diesels. This reduces the creation of NOx by lowering the combustion pressure and temperature. Interestingly enough, it seems the gasoline compression ratios are approaching 14.0 also allowed by direct injection. In this picture, you get a good view of the bypass valve to control the flow between the HP and LP turbos. |
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| Callaway brought out the 1997 C7 race car which they raced at the Rolex 24 Hours of Daytona and also LeMans. |
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| Anyone who follows road racing should know the name Boris Said. Looking towards the front of the car, air is drawn from the front bumper and dumped out these vents in front of the base of the windshield. That should generate a good amount of frontend downforce. The roof scoop should be feeding the engine and maybe a few heat exchangers too. |
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| The backend of the car features NACA ducts and scoops feeding heat exchangers mounted in the rear of the car. |
