Vacuum Brake Booster

PRESSURE WITHOUT ENGINE RUNNING:
Pedal Force:
147 N (33 lbs.) 588 kPa (85 psi)
294 N (66 lbs.) Pedal Force 1,863 kPa (270 psi)

PRESSURE WITH ENGINE RUNNING [1]:
Pedal Force:
147 N (33 lbs.) 5,394 kPa (782 psi)
294 N (66 lbs.) 9,219 kPa (1,337 psi)

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