I stumbled across this little tidbit of info today. Not sure how true it really is, but if you've ever wondered what that power injection light on your GN/T-type was for....
It also mentions a few known names in the turbo Buick community.
Source: Alcohol Information
Ever wonder why Turbo Regals have the "Power Injection" light on the dash and "Power Injection" location in the fuse box? GM had plans to put water injection on Turbo Regals for power enhancement by reducing detonation and increasing boost levels. Unfortunately it did not go into production. The light would illuminate when the water injection was pumping.
It also mentions a few known names in the turbo Buick community.
Source: Alcohol Information