Editing Brakes (section)
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====Some guidelines from MP Brakes:==== A midsize GM car with disc brakes in the front and drum rear brakes will require at least 900-1,000 psi to the wheels to lock them up. The pressure output of the booster is directly proportional to its diameter, the larger the booster the greater the power assist. The following assumes 18 in/Hg of vacuum at idle, and 120 psi of pedal force: *Four wheel disc = 9" dual diaphragm (1200 psi) *Front disc/rear drum = From the 9" dual (1200 psi) down to a minimum of a 7" dual (900 psi) *The 8” dual diaphragm booster makes 1,000 psi *9” single diaphragm 900 *7” dual diaphragm 900 *7” single diaphragm 800
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