keithmac
Guru
If it's the same style system, (water Injection) a former colleague ran a Saab 99 turbo beautiful car IMO, in the late 1970s, all sorts of tuning done to it plus water injection...the thing was an absolute beast, but a sleeper at the same time. Itd touch 100 mph in double quick time..at that time.
Downside was...it had so much done to it it became somewhat unreliable, but a real punch you into the seat car.
Just had a look, it was an Optional Extra on the Saab (factory fit), yep same idea and principles.
Apparently BMW have had a factory fit option recently as well.