K Smith wrote in message
I will point out that garden variety aluminium, we use it here, has a
"melting" point of about 660C or 1220F. So your new "special" high temp
alloy pistons might be stronger, but they are an admission the fuel is
autoigniting, which it definitely is by much much lower temps.


Gee, I have some garden-variety aluminum in my aluminum-framed folding
lawn chairs. Are you implying that because engine manufacturers use
something stronger that that implies there is something inherently
wrong with the engines?

Maybe the higher temp aluminium has different machining qualities or
expands less when heated or allows for tighter tolerances. There are
many reasons in engine manufacturing to step up to a higher grade
metal or even a different metal altogether.

You seem to suffer from tunnel vision and think that because
Manufacturer X does something different, it must be for a negative
reason.

I think I asked you before are you an engine design engineer or some
sort of super mechanic?