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Due to the many losses in the conversion of heat to mechanical energy a gallon of fuel provides less than 1/4 of its mechanical equivalent of useable energy at the flywheel. These losses are described and an attempt is made at cataloguing them and appraising their magnitude at one speed and road load corresponding to the speed and road load of a compact car operating at 40 miles per hour on a level road. Some areas where improvements in efficiency may be obtainable through future research and development are discussed. A speculative estimate is made as to possible future efficiency increases based on this study.

This paper describes some factors influencing small turbocharger design and describes some techniques used in their development. In the first section, specific techniques used in developing turbocharger journal bearings and rotors are discussed. The influence of engine application upon turbocharger aerodynamic design requirements is discussed with examples in the second section.

This paper presents a background of the cam and tappet wear problem encountered by the automotive industry during the evolution of the modern overhead valve V-8 engine. Investigation of the numerous factors affecting this problem revealed that engine oil composition was of major importance. The development of a test technique to determine the adequacy of engine lubricant antiscuff properties is described and evidence of correlation with field experience is presented. This test technique was accepted by Section G-IV of Technical Committee B of ASTM Committee D-2 in October, 1959 as Test Sequence IV. This test was one of a series of test sequences to be used for evaluating oils for API Service MS. Shortly after the end of World War II, the modern V-8 engine was introduced to the American motorist.