May 13 (edited)
Valve liners and cylinders
As I progress with the new cylinders I realise that that Donald Rumsfeld was right ! " because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns—the ones we don't know we don't know."
In simpler terms:
Known knowns: Things we are aware of and understand.
Known unknowns: Things we are aware that we do not know or that are uncertain.
Unknown unknowns: Things we are completely unaware of and do not even consider."
There are three different crankshafts with three different strokes of valve travel, this in turn means that there are ( at least three) different cylinder castings with the grooves which the liner ports have to line up with in different places, several different liners with different port positions and widths and on top of that multiple different valves all with different admission and exhaust characteristics......and no real records of what goes with what.... more sleepless nights
In simpler terms:
Known knowns: Things we are aware of and understand.
Known unknowns: Things we are aware that we do not know or that are uncertain.
Unknown unknowns: Things we are completely unaware of and do not even consider."
There are three different crankshafts with three different strokes of valve travel, this in turn means that there are ( at least three) different cylinder castings with the grooves which the liner ports have to line up with in different places, several different liners with different port positions and widths and on top of that multiple different valves all with different admission and exhaust characteristics......and no real records of what goes with what.... more sleepless nights
