[Trevor]

Centrifugal force increases with RPM and is an important consideration in respect of big end bearings. Think on this while examining the cross section and routing of the oil ways in the crankshaft. The length and cross section of passages leading outwards should equal those running inwards, so that there is a balance. However in any event, friction is increased due to substantial inertia and in particular, any abrupt changes in cross section result in increased resistance.

All in all this is probably the most critical section of engine in regards to oil flow/pressure, hence the first to give trouble. It must be remembered that the oil is a major and vital dissipator of localised heat, as well as being a lubricant. An added efficient oil cooler must surely be essential when the engine is being subject to above normal stresses.