Using the new 6.7-liter Power Stroke V8 turbo-diesel engine, the truck hit a top speed of 171.123mph setting the new B Production Diesel Truck land speed record.
The Ford truck broke the B Production Diesel Truck record of 166.850mph by a Duramax diesel GMC. This class normally consists of race vehicles with extensive aftermarket modifications.
Hajek’s 2011 Ford F-250 was mostly stock, with changes to the high-pressure fuel pump, fuel injectors and turbochargers for improved air and fuel flow. The compression ratio was also lowered to avoid detonation.
Also running on soy-based B20 biodiesel, the truck smashed the existing 130.614mph unlimited biodiesel land speed record by running at 182mph. Every 6.7-liter Power Stroke turbo-diesel can operate on a mixture of diesel up to 20 percent biofuel. This capability is significant for the Hajek Motorsports team given its history and support for sustainable farm-based fuels and the desire to prove that speed and performance are not compromised by using fuels like E85 and B20 biodiesel.
“The F-250 is an excellent truck with amazing capabilities. I’m amazed at how, with very few changes from stock, we were able to accomplish this,” said Brent Hajek, owner of Hajek Motorsports.
Hajek, a soybean and corn farmer from Oklahoma, knows about F-250s and biodiesel fuel. He runs six on his farm, with his 1997 model accumulating more than 400,000 miles.
Ford engineers teamed up with Hajek to design and install the modifications to the production-level truck. Changes were made only to the top-end engine components. “The engineering that went into the base engine provided us with a rock-solid foundation to start from,” said Paul Niessen, powertrain engineer. “And it worked out great since we increased the output of the engine by more than 50 percent over production with just a few changes.”
Work on a chassis dynamometer before the attempt proved the engine was able to adapt to biodiesel and deliver both horsepower and fuel economy. It also verified the performance of the production transmission and drivetrain. Components added for safety included a rollcage and five-point harness.
In 2009, Hajek Motorsports propelled an E85-powered Mustang to a land speed record at Bonneville with a record-breaking run of 255.764mph and an exit speed of 258.410mph with Danny Thompson, son of motorsport icon Mickey Thompson, behind the wheel.
In 2010 Hajek Motorsports, Ford Racing, Wood Brothers, Bud Moore and NASCAR driver Bill Elliott teamed up to establish a closed-course speed record on E85 with the reconfigured Bonneville land speed Mustang at Talladega Super Speedway. On the second attempt, Elliott crashed, but not before establishing an E85 record of more than 170mph.