Attached are the results of a stock CPL 858. I hope this helps with some of the discussion.
Yes I realise this. But many dynos (and electronically controlled diesels) do still measure and record the AFR for diagnostics reasons.there is really no AFR in a diesel. power is depends on how much fuel and air can be compressed in the chamber, even though there is a rich and a lean condition. diesel is not affected much because it has different properties from gas.