Vacuum Brake Booster

PRESSURE WITHOUT ENGINE RUNNING:
Pedal Force:
147 N (33 lbs.) 785 kPa (114 psi)
294 N (66 lbs.) 2,158 kPa (313 psi)

PRESSURE WITH ENGINE RUNNING [1]:
Pedal Force:
147 N (33 lbs.) 5,492 kPa (796 psi)
294 N (66 lbs.) 8,434 kPa (1,223 psi)

[1] Vacuum at 66.7 kPa (19.69 inHg).