^^ yes but lower oxygen, a lot lower. With petrols, yes, it can be catered for up until a point. With diesel there is a glass ceiling, and when you go past it, you just get a tonne of extra diesel being thrown into engine, it doesn't burn (not enough oxygen to work with it) and then throws heaps of fuel out back end. And don't even try to rev it, you just get knock which wrecks the head.
Also on higher powered models, EGT's start to get lethal. Every time were climbing for more than 5/10mins straight (and anything required WOT) the stench of hot metal and burning under side protection.
Oh, we did have one breakdown, one of the cold side boost hoses went, leaving us with not enough power to actually move, so had to be recovered to next town, where they made one from a chinese truck fit with some epic sized turbo clips / jubilee clips