Even with engineering maths, I fail to see how the equations that would lead to an engine that didn't det' (cylinder pressures, various temp's etc) could be correct if the you don't know at what point an engine would suffer det'

We both know engines CAN det' so it stands to reason that to avoid it, you HAVE to be able to detect it, else how do you know WHAT you are avoiding or HOW to avoid it?

LOL @ sales - that doesn't mean people cannot learn other things after being in sales......I wasn't always able to program a computer, but it doesn't mean that because it wasn't my first job that I can't now