Brake Pressure by System Chart (PSI): Manual, Vacuum, Hydro-Boost, Electro-Boost

This document is a bar chart titled "Brake Pressure By System" comparing the hydraulic brake line pressure (in PSI) produced by six different brake actuation systems. The chart shows that manual brakes (no booster) produce 701 PSI, a 7" single-diaphragm vacuum booster yields 713 PSI, a 9" double (dual-diaphragm) vacuum booster produces 1210 PSI, a Hydro-Boost hydraulic booster produces 1465 PSI, a Hydro-Max system produces 1783 PSI, and an Electro-Boost (electric high-power) system produces the highest pressure at 2229 PSI. The Y-axis is scaled from 0 to 2500 PSI in 500 PSI increments, and a color-coded legend identifies each system. A reader can learn the relative pressure output of common brake booster upgrade options, seeing that hydraulic and electric boost systems generate roughly two to three times the line pressure of manual or small single-diaphragm vacuum-boosted brakes. The chart contains no vehicle year, make, model, part numbers, or test conditions; it is a comparative reference likely used to justify brake booster upgrades (the same album contains an ABS Electric High Power Master Cylinder scan, which relates to the Electro-Boost figure).