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Mazda Skyactiv-D racer first diesel to run at Indy in 60 years

While it may not be touting the old "Win on Sunday, sell on Monday" axiom we all know and love, Mazda recognizes that racing can only improve its cars. And so it's no surprise that the Japanese automaker is testing and refining its Skyactiv-D diesel engine by sending it out on various race tracks around the country - notably being the first diesel ever to compete at Daytona and the first to notch a Grand Am win at Road Atlanta.
Next up? Indy. It has been over 60 years since a diesel-powered machine ran at the Indianapolis Motor Speedway, and the Cummins-powered racer that competed in the 1952 Indy 500 with a 6.6-liter inline-six-cylinder oil-burner was a fast and brutal machine that set a new lap record in qualifying leading up to the race. Though that car was withdrawn with turbocharger failure 71 laps in, its diesel powerplant left an indelible impression on the racing community, and that's something Mazda hopes to accomplish once again.
Mazda says that the diesel engine in its race car is pretty darn close to stock - 51 percent stock by parts count, and 63 percent stock by weight - which means the way it performs in competition is at least a somewhat meaningful way to the stock engine's durability in the real world. Check out the image of the Mazda6 Skyactiv-D racer posing alongside the 1952 Cummins above (click to enlarge) and feel free to peruse the press release below for the rest of the details.

2016 Mazda MX-5 Miata first engine shot revealed

We've dug deep for just about every scrap of 2016 Mazda MX-5 Miata info available out of the car's California reveal celebration, but powertrain particulars have been especially hard to come by. While we still don't have engine specifications, the folks over at Autoweek have scored a nice scoop - the first underhood photos of one of the display cars.
In the image above, the ND-generation Miata is clearly shown to be powered by a Skyactiv inline four-cylinder, as expected, but its displacement remains unclear. The engine is most likely either the 2.0-liter Skyactiv-G engine offered in low-end Mazda3 and CX-5 models or the 2.5-liter Skyactiv-G found in those same vehicles' upper trims. In those iterations, the 2.0-liter generates 155 horsepower and 154 pound-feet of torque, while the larger-displacement engine nets out at 184 hp and 185 lb-ft. There is no sign of a turbocharger, a feature rumored to be fitted to at least one test mule. There has also been previous rumors of a 1.5-liter Skyactiv engine, possibly for overseas markets.
The 2.0-liter strikes us as the most likely scenario, particularly as Mazda has worked diligently to save every gram in the new car, dropping a pledged 100 kilograms (220 pounds) over the current model, even while adding content. It's entirely possible that the alleged turbo car was, in fact, a mule for the Miata's Alfa Romeo sister car, which is expected to have a wholly different powertrain. Or it could simply be a second engine option for an eventual Mazdaspeed variant, perhaps.

2002 Mazda MX-5 Miata powered by a Jaguar-sourced V6 for sale

Cars & Bids, a relatively new site that specializes in auctioning modern enthusiast cars, is selling a 2002 Mazda MX-5 Miata. While that's hardly unusual, this example lost its four-cylinder engine and gained a Jaguar-sourced V6. Pulling a 3.0-liter six out of a 2000 S-Type and dropping it into an unsuspecting Miata is apparently easier than it sounds. England-based Rocketeer offers a kit that makes the swap reasonably straightforward, though the listing notes the factory air conditioning system is not compatible with the new engine. Cold air aside, the installation is done so neatly that it looks like Mazda envisioned the Miata with a bigger engine. Jag's V6 inevitably adds weight to a roadster praised globally for its nimble handling, but it also brings a whole lot of horsepower to the table. Left stock, a 2002 Miata is powered by a 1.8-liter four-cylinder that makes 142 horsepower and 125 pound-feet of torque. The example listed on Cars & Bids puts 220 horsepower and 221 pound-feet of torque under the driver's right foot, figures that easily offset the weight gain. And, somewhat surprisingly, the six spins the rear wheels through a stock five-speed manual transmission. Flyin' Miata sway bars and Koni shocks improve handling. Close the hood, and this Jagazda looks like a run-of-the-mill 18-year-old Miata. The seller made no modifications to the body, it's still painted in its original shade of silver, and he kept the stock 15-inch wheels. The dual exhaust tips hint at the V6, but they're subtle enough to surprise more than a few racers at the next autocross event. The auction is live now, and bidding stands at $4,250 as of writing with about three days left before the hammer drops. If you miss your chance to bag it, several shops sell kits that let skilled shade-tree mechanics shoehorn Mazda's K-Series V6 (which powered the MX-6 and the Ford Probe, among other cars) into an older Miata. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.     Featured Gallery 2002 Mazda MX-5 Miata with Jaguar V6 View 14 Photos Aftermarket Jaguar Mazda Convertible