The solution to this problem is to remove the internal gerotor oil pump completely and replace it with a true dry sump oiling system that uses a spur gear style oil pressure pump. ![]() This causes cavitation that becomes exponentially worse as the RPM increases. At this speed, the oil is not able to fill the larger swept volume of each pumping cavity fast enough at the inlet of the pump. However, the gerotor pump starts to show its weakness when the engine RPM increases over what the engineers intended, around 6500 RPM. ![]() A gerotor oil pump works well for a production vehicle for daily street use, as it provides high oil volume at low RPMs and shows a relatively constant oil pressure on the gauge throughout the engine’s OEM RPM range. This engine uses a gerotor-style pump driven by the crankshaft, this is the same for both the wet sump and OEM "dry sump" configurations. One critical limitation is the design of the internal oil pump. This engine does have limitations though. ![]() The GM small block LS engine is one of the most widely used engine platforms across auto racing due to its simple, lightweight design and high power output.
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