Oh....better put in some details for folks to understand what I just said...
Take the crank shaft journal bearing between that turbo'd 3L and NA 6L
Almost twice the volume in the CC, so lots more power from the combustion stroke
In the NA 6L, that journal is sized for the expected worst case combustion PSI
on the piston top. That is then transmitted to the crank journal via connecting
rod (wrist pin on top end and journal bearing on the bottom end)
Designers have calculated that expected worst case plus some margin.
The oil system is then designed to provide the PSI at some GPH so that the journal
bearing does NOT go metal to metal. You folks know that a journal bearing on
an ICE crank is designed to not go metal to metal, but to float the crank journal
and rod journal on an oil film, right?
If the turb'd 3L's journal isn't designed for that kind of PSI...over time the
journal bearing surfaces will go metal to metal.
Did they increase the dia and width to lower the PSI? Did they increase the PSI@GPH
to have the oil not get squished out?
Question is how much and how often it goes metal to metal...meaning longevity is
determined by that
