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Colin Braun in the Michael Shank Racing Riley Ford set a Daytona International Speedway 1-lap record of 222.971 mph with the EcoBoost V6

 
Record-setting Ford EcoBoost Sportscar - and its V6 Engine

The 3.5-liter Ford EcoBoost V6 engine powering Colin Braun to a number of speed records contains a great deal of production parts - and is nearly identical to the new version that will run in the Tudor United Sports car series. (The Grand Am series has joined with ALMS to become the Tudor United Sportscar Championship).

The Riley Technologies Daytona Prototype from Michael Shank Racing set a Daytona International Speedway 1-lap record of 222.971 mph during a dedicated speed testing session. It broke the Speedway record of 210.364 set by Bill Elliott in a Ford Thunderbird when he qualified for the 1987 Daytona 500.

The team also set world speed records for the 10-mile standing start at 210.018 mph and 10-kilometer standing start at 202.438 mph (Subject to FIA certification).

"It was a challenging day," Braun said. "The power in the new EcoBoost engine was incredible, and it was amazing how fast it came up to speed on the runs. Our first run this morning was 209 mph, and it was an edgy drive at that speed."

Ford has announced that the 3.5-liter EcoBoost will replace the venerable 5.0-liter V8 that has been used in Grand Am DP racing since the series began in 2003. The Daytona Prototype class is unique in that a number of different engines, including BMW, Lexus, Honda and Porsche, are certified for competition.

Development of the 3.5-liter EcoBoost for the DP class began more than two years ago as the 5.0-liter engine (not the current "Coyote 5.0) was finally showing its age. Surprisingly, Ford never won the engine-manufacturer title with the 5.0. "The 5.0 had run its course,"said John Maddox, road racing program manager at Ford. "It was basically an bored-out 4.6-liter from the ’99 Cobra Mustang. The ‘cammer’ motor, per se, no longer existed."

Ford knew it needed a new engine for sports car racing, and the EcoBoost was a better choice than modifying the 5.0-liter Coyote V8. "The series wants more technology and more production relevance," says Maddox." "In the beginning, Grand Am wanted the power curve to mimic our 5.0-liter. Same power and get as close to the torque curve. Now we’re looking at 600 SAE."

RoushYates says the new EcoBoost race engine will utilize "60 to 70 percent" production components, including the block, cylinder heads and valvetrain. RoushYates installed a dry-sump oiling system that was for the most part a carryover from the 5.0.

"The camshafts will be a little different," says Maddox. "Otherwise it’s a race crank, rod and piston." Few modifications were required on the heads. The intake port is as-cast with only some bowl work, and the exhaust port was opened up. A pair of Borg-Warner EFR turbos that are larger than stock are utilized, and the induction system is conventional for a race engine. The boost is currently set in the range of 12 to 13 pounds.

RoushYates engineers addressed three primary challenges in developing the EcoBoost engine for racing: direct injection, loads on the rod and piston and exhaust temperatures. "We went to our big brothers in the Cup shop and leaned on those engineering resources to work through the issues," says Maddox.

The team adapted the required Bosch ECU to the fuel system. When the power levels were achieved, then durability was addressed by doing extensive testing conducted at a Ford dyno-test cell.

"In the 5.0 we divided its horsepower between eight cylinders," notes Maddox. "The V8's cylinder pressure was significantly lower than dividing 600 between six cylinders."

Testing and development will continue right up to the start of the Rolex 24 Hour race in January 2014.

"There has been a lot of hard work by a lot of people to get it to where it is today," sums up Maddox, "but this EcoBoost engine is relevant, state-of-the-art production technology in racing."

Michael Shank Racing’s new Ford EcoBoost-powered Riley Daytona Prototype smashed a 26-year-old track record at Daytona International Speedway.

The engine itself looks pretty stock

Of course, the installation in the Riley Chassis shows the super high technology needed to achieve over 600 HP

Another view showing the huge intercoolers

Here's the engine undergoing dyno testing prior to setting the record

A stock EcoBoost V6

You can find versions of this engine in Ford F-150s and the factory hot rod version in the Taurus SHO