|
It has more to do with oil delivery to the journal bearings. As engine speed lowers it's harder for the hot oil to develop a hydrodynamic wedge. This leads to metal on metal contact which as Im sure you know is bad. There are some things that can be done to extend the low rpm performance of the bearing but all to my knowledge negatively effect the high rpm performance, in one case even causing the bearing to pump oil against the oil pump.
|