This paper concerns the study of the high-speed effects of gas and inertial loading of the bearing system response of a V8 racing crank train system operating at speeds of up to 20,000 rpm. The system has been modelled within the author’s engine design software, which is an object oriented engine design CAE environment. The study is restricted to the bearing responses and resulting system friction whilst operating at speeds of 5,000, 10,000, 15,000 and 20,000 rpm at full load conditions. Two crankshaft configurations have been investigated, the cruciform and the planar crankshaft systems. The bearings have been modelled as Rigid HydroDynamic (RHD) solutions with a Bulirsch-Stoer time integration scheme. The bearing system, frictional response and loading of both engine arrangements have been compared to determine the best configuration from both a loading and overall frictional losses point of view.

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