Posted by Cetane_100 on
March 2, 2009
Hayes Diversified Technologies (HDT) USA, the maker of the world’s only motorcycle purpose built diesel motorcycle engine, is entering the 2009 SCORE International Baja 250 which will be run in San Felipe, Mexico on March 14th. The world renowned off-road race will serve as a proving ground for the well tested and well prepared composite race team made up of members from HDT USA and Team SRD. The newly formed team will combine their successes from the diesel motorcycle land speed record at the Bonneville Salt Flats and their class 22 podium producing finish in the 2008 SCORE Baja 500.
In the early ’70s HDT raced and sold Pentons (early KTMs) and produced high-performance suspension and engine parts for motocrossers. In 2000 they sent the Marines their first diesel prototype motorcycle (based on the Kawasaki KLR650) for testing; the production model was delivered by HDT in September of 2006. Current owner of HDT Fred Hayes and associate Bryon Schmidt—both veterans—enjoy using racing to develop diesel record-breaking motorcycles at Bonneville. HDT USA is honored to serve the men and women of our Armed Forces by providing the best equipment possible. HDT USA is proud to provide the best in diesel motorcycle technology to both our government and civilian customers.
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Posted by Cetane_100 on
January 3, 2009
A 11 liter diesel engine has a long stroke. That means that the piston is traveling a relatively long distance up and down in its cylinder on each cycle. A racing engine, on the other hand, has a short stroke. The piston in a racing engine has a large diameter for the engine size, and it goes up and down a relatively short distance on each cycle. This means that a race car engine can run much faster -up to 22,000 rpm in the F1 engines until limited by regulation to 18′000 rpm, 15,000 rpm in a Champ Car engine — but has relatively little torque. A large diesel engine usually cannot get above 2,000 RPM, but has huge torque because of the long stroke. The torque is what lets your engine pull a huge load up a hill.
Why does an engine with huge torque and low maximum RPM get a low horsepower rating? We know that one horsepower is equal to 33,000 foot-pounds of work per minute. By this measure, one horse can raise 33 pounds 1,000 vertical feet in a minute, or 330 pounds 100 feet in a minute, or 3,300 pounds 10 feet in a minute, and so on. What an engine naturally produces, however, is torque. Think about one piston in a gasoline engine. When the gasoline ignites, it pushes on the piston, and the piston exerts pressure on the crankshaft, causing it to turn. The crankshaft feels some number of foot-pounds of torque in the process. There are three variables that affect torque:
- The size of the piston face
- The amount of pressure that the ignited fuel applies to the face of the piston
- The distance the piston travels on each stroke (therefore the diameter of the crankshaft). The bigger the diameter of the crankshaft, the bigger the lever arm and therefore the more torque.
There is a direct relationship between horsepower and torque. You can convert torque to horsepower with the following equation:
HP = Torque * RPM / 5,252
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Posted by Cetane_100 on
September 7, 2008
Off-road racing team Arciero-Miller Racing is preparing a new Volkswagen Touareg Trophy Truck for the SCORE International Racing Series. The new Touareg TDI is being propelled by the new 6.0L V-12 that will be used in the production Audi Q7 V-12 TDI later 2008. The new truck is a tube frame design currently by built by Arciero-Miller specifically for the SCORE Trophy Truck class. Volkswagen is creating a body patterned after the body style of the Touareg. The body will be about a foot longer than the production SUV. The V-12 power-plant is based on the 60 degree V-angle block that has been shown in Audi Q7 and R8 concepts in 2007 and 2008. The engine used in the Audi R10 TDI Le Mans prototype uses a 90 angle between the banks of the block.
Aside from the block configuration, the two engines share much of the same technology including high pressure common rail injection and piezo electric injectors. The Touareg Trophy Truck will debut sometime this fall. Drivers Ryan Arciero and Mark Miller will compete in the Baja 1000 with the Touareg V-12 TDI in November 2008. Arciero and Miller have previously won the diesel class at the Baja 500 with a 2.5L five cylinder Touareg TDI and the Pikes Peak Hill Climb with a 5.0L V-10 powered version.
