Hello again....lots of questions in restoraing 65 Impala. Added dics brakes to front. Used cpp two yrs ago on another 65 Impala. Could not maintain enough vacumn (only12'') this was with a stock solid cam on 425hp 396.
Added extra vacumn canister and electric pump...still took extreme pressure on pedal to stop. Took the system off and back to drum brakes. Want to try again on the next 65 Impala and add disc to front....again but have heard about ''Hydroboost''. I don't know how involved it is. Any ideas would be appreciated.
Back in 1965 many BB cars came from the factory with power disc brakes. Many of these cars had solid lifter camshafts that would not produce 15-18'' of vacumn as required. So....how did they get buy back in the day with power disc brakes? thanks for help and advise ....Elmo
Drum brakes operate on 750 psi. Disc brakes require two to four times that amount of line pressure to work.
Any GM diesel powered vehicle will use a HydraBoost because diesels do not have any manifold vacuum. If you have no manifold vacuum because you have a cam too big for the street you will need a HydraBoost to have power assist brakes. I prefer manual brakes, and manual steering (Saginaw 525, Corvair or a Vega gear box) on my race cars.