Brake mean effective pressure (BMEP) is calculated from measured dynamometer torque. According to the dynamometer car, this was then developing 3,787 equivalent drawbar horsepower. In actual dynamometer testing, it produced and of torque in purely stock form. The water brake absorber is sometimes mistakenly called a "hydraulic dynamometer". In the case of an engine dynamometer, power is measured at the engine's flywheel. Tuning specialists often utilize a chassis dynamometer for street and other high performance applications. The state of calibration of the dynamometer car is not known. The speedometer of the car is tested by driving on a dynamometer. In 2002, Dyne Systems of Jackson, Wisconsin acquired the Dynamatic dynamometer product line. The motor ran on a test dynamometer for 1,000 hours. Period dynamometer testing however, supports Ford's rating. These numbers were government figures, measured indoors using a dynamometer. Reliable third party dynamometer testing results have not been published. Tornado was unveiled on the turntable with the NRM North Eastern Railway (NER) dynamometer car. The newly developed engine was first tested on a dynamometer in May 2003.