Tighter tolerances in manufacturing, but not tighter clearances with regard to engine specs.Both. There is no dispute that newer = tighter tolerances. Thinner oils flow faster into these smaller spaces and hydrodynamic oil separation of moving parts occurs faster. IF heat is well managed, these thinner oil films won't turn into coked brown clogged messes.
I think that's referring to "Clearances."...Thinner oils flow faster into these smaller spaces and hydrodynamic oil separation of moving parts occurs faster...
Once again: Both. This is normal in almost all industries, when I was in metal stampings, the push was always to have machining tolerances at stamped metal prices. Computer memory is another example..Tighter tolerances in manufacturing, but not tighter clearances with regard to engine specs.
Which engine clearances are tighter? Clearance is still relative to bore size/bearing journal size and metal expansion with heat. I don't see clearances tighter than in the past. Probably with piston ring lands higher on the pistons in the last 20 years or so, there may be more piston ring end gap than in the past.Once again: Both. This is normal in almost all industries, when I was in metal stampings, the push was always to have machining tolerances at stamped metal prices. Computer memory is another example..
Define tighter engines.Always thought it was only about fuel economy but with better manufacturing techniques and wanting better performance squeezed out of engines could it involve tighter tolerances as well?
Your thoughts?
Yeah right. Just how big do you think oil molecules are?Think about trying to thread a bolt into a threaded hole. If the oil on the bolt threads is too thick, it's not going to go into the hole with the bolt. Just like a truck that's too tall to go through a tunnel or underpass.
Thank you ... was just about to post the same thing.Yeah right. Just how big do you think oil molecules are?
It helps in these "thick vs. thin" discussions when people stick to physics.
Umm. Come again???Think about trying to thread a bolt into a threaded hole. If the oil on the bolt threads is too thick, it's not going to go into the hole with the bolt. Just like a truck that's too tall to go through a tunnel or underpass.
Which engine clearances are tighter? Clearance is still relative to bore size/bearing journal size and metal expansion with heat. I don't see clearances tighter than in the past. Probably with piston ring lands higher on the pistons in the last 20 years or so, there may be more piston ring end gap than in the past.
Yeah right. Just how big do you think oil molecules are?
It helps in these "thick vs. thin" discussions when people stick to physics.
Thank you ... was just about to post the same thing.
Y’all are getting trolled by Merk.Umm. Come again???