Buick never used a vacuum booster on a GN
My original post 7 years ago was that Buick knew better than to install a vaccum booster on a Supercharged car. Vacuum boosters need vacuum. 20" of it to work. Blowing air INTO a vacuum booster drops all power assist to manual brakes, or could, if the check valve did not hols blow the steel shells apart. Several guys here have experienced brake FAILURES at speed when the boost blew the hose off, or the check valve aprt. Buick already knew this. They look at any reason they can be sued, and brakes is at the top of the list. THAT is why they spent the extra money experimenting with the PowerMaster. Vacuum ISSUES. The GN has several strikes against it, vaccum wise. 1, small cubis inches 2. Turbocharged (opposite of vacuum) 3. overdrive trans (car runs along in OD) 4. F.I. It only cost Buick $20 for a vacuum booster, but 15 times that for the PowerMaster. Why? Becaus eof brake failures. Guys spend enormous amounts of money to make their car go faster, and then "go junkyad cobbled up" brake systems? What is your car worth? What is your life worth? I saw a on "Pinks All Out" a GN lose the race (and his car) when he tried to spool up the Turbo, and the car pushed thru the lights, and he redlighted. It was obviously a "Vacuum" brake booster. Guys HERE have reported being able to hold the car to 22lbs of boost with a Hydroboost brake.