Pump-displacement volume is typically determined by gear size. The oil pumps below (left to right) represent two different displacements, as noted by the case size. For high-performance work, a steel ...

While everybody knows what the oil pump's job is and why it's there, few enthusiasts consider the lowly bubbler as a possible engine tuning resource. We've come to appreciate that it takes power to ...

Many larger refrigeration and air conditioning compressors — usually over 5 horsepower — have forced oiling systems. These compressors contain an oil pump located at the end of the compressor’s ...