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An Eaton M62 Roots-type supercharger is visible at the front of this Ecotec LSJ engine in a 2006 Saturn Ion Red Line.. The Roots-type blower is simple and widely used. It can be more effective than alternative superchargers at developing positive intake manifold pressure (i.e., above atmospheric pressure) at low engine speeds, making it a popular choice for passenger automobile applications.
In 1900, Gottlieb Daimler patented a Roots supercharger for a car's internal combustion engine. [7] In 1931, Roots Blower Company and Connersville Blower Company were bought by the International Derrick and Equipment Company to found Roots-Connersville Blower Company. The same year, the company began production of centrifugal compressors. [8]
The Roots supercharger dates back to the 1860s, and this is the basis for the original Wade supercharger, but with patented modifications incorporated. The first patent of Costin and Densham deals with ways to achieve compression within the Roots-style blower. [2]
Roots blowers (a positive displacement design) tend to be only 40–50% efficient at high boost levels, compared with 70-85% for dynamic superchargers. [ citation needed ] Lysholm-style blowers (a rotary-screw design) can be nearly as efficient as dynamic superchargers over a narrow range of load/speed/boost, for which the system must be ...
The BBK (big brake kit) was designed by StopTech. To further its track and sport appeal, TRD also offered a dealer-installed and warrantied roots-style supercharger which raised the power from 236 to 300 hp (239 to 304 PS; 176 to 224 kW) and the torque was raised from 266 to 345 lbf⋅ft (361 to 468 N⋅m).
The Marshall superchargers were initially manufactured by Marshall Drew and Co Ltd in the 1930s and marketed for increasing car performance. [2] Toward the end of the 1930s Marshall superchargers were listed by Sir George Godfrey and Partners (Holdings) Ltd of Hanworth, Middlesex, made by them to the designs of J.W. Marshall. [3]