Optimized turbocharger bearing system

A method, comprising:

• increasing a first contribution to reducing imbalance in a first fluid film fixed pad bearing;
• compensating for a decrease in stability of the first fluid film fixed pad bearing;
• and
• increasing a second contribution to reducing imbalance in a second fluid film fixed pad bearing, wherein the first contribution is at a first end of a journal shaft? and the second contribution is at a second end of the journal shaft?.

A system, comprising:

• a shaft;
• a first fluid film fixed pad bearing disposed about the shaft at a first end portion of the shaft, wherein the first fluid film fixed pad bearing comprises a first clearance ratio, a first effective length, and a first drop;
• and
• a second fluid film fixed pad bearing disposed about the shaft at a second end portion of the shaft, wherein the second fluid film fixed pad bearing comprises a second clearance ratio, a second effective length, and a second drop;
• wherein the first effective length, the first clearance ratio, and the first drop are adjusted to increase stability in the first fluid film fixed pad bearing and reduce imbalance loads;
• wherein the second clearance ratio and the second drop are adjusted to increase the stability in the second fluid film fixed pad bearing and reduce loads caused by synchronous imbalance in the rotor.