Conversly you find the more power you're making the smaller the Gate you can run as you're NOT bleeding exhaust gas trying to control the Turbine speed!
On my 3540R it has a little internal gate and has no problem at all even at maximum boost/flow due in part to the 1.06 Turbine housing...
LOL but they're one of the worst leaks we have! ;)
Looser tolerances will mean more space for the Oil Wedge to be displaced increasing the chance of Metal to Metal contact between the bearing and the crank surface.
While modern bearings are robust even the best of them will only do this...
"Trim" is just a number and on it's own isn't actually a size.
It's used to express the relationship between the smaller diameter part of a turbo wheel and the larger part.
You could have 2x 57 trim wheels one being 2" diameter and the other being 3" and while both are 57 trim the 3" would...
Can't really see it being a heat issue.
I've ran motors to death with no coolant/oil in em and they didn't look anything like that!
It's almost like the Oil ring expander was outside of the upper and lower Oil rings.
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