Tuning for water injection: fuel, ignition, and EGT

[Richard L]

I am trying to clarify between knock threshold and MBT.

Tuning these days, knock threshold arrives much early before reaching MBT, it appears that no one are too concerned about MBT. I wonder if it matters or not whether if MBT is the main aim anymore?

The general road car tuning strategy seemed to be accepted as follows:

Run as much boost until the flow linit of the turbo is reached, dumping as much fuel as possible until egt is below 900C. Wind on as much ignition retard as possible until knock disappears.

I was wondering if this common method can be improved? with or without water injection.