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Why Not 125 BMEP in an L-Head Truck Engine?
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 1, 1939 by SAE International in United States
Annotation ability available
HIGH output per cubic inch of piston displacement is desirable not alone for the purpose of being able to transport more payload faster, but more particularly for the invariably associated byproduct of lower specific fuel consumption, and especially at road-load requirements.
The only way of accomplishing this purpose is through the use of higher compression ratios, and the limiting factors for this objective are fuel distribution and the operating temperatures of the component parts. A manifold is proposed which not only definitely improves distribution at both full and road loads, but has the inherent additional advantage of reducing the formation of condensate, thus still further facilitating a reduction in road-load specific fuel consumption.
Hydraulic valve lifters, obviation of mechanical and thermal distortion, and controlled water flow are the essentials in improved cooling.
Attention also is directed to the importance of ignition wiring and timing with both the inertia and vacuum control as requisites.
The suggestions bring the contemplated output within the realm of practical possibilities.