[Krieger]

One stop shopping for what readings to expect with a combo Vac/Boost guage in your PT Cruiser GT.
Upper and lower airbox silencer delete and K&N drop in filter results:
Idle cold in park: 12-14 Hg
Idle warm in park: 18 Hg
Idle in drive: 12-14 Hg
Coasting in D around 35mph: 20 Hg
Coasting in D around 65mph: 24 - 28 Hg
quick gradual 60-80% throttle: 5-8 Psi dropping rapidly
Mashed from a stop: 14 psi through 1st gear dropping down to 2 or 3 psi during shift and going back to 10 dropping fast to 8psi or lower depending on how the computer thinks it feels (ie inconsistent).
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Hallman ES manual boost controller installed and conservatively set:
Same previous idle readings.
Driving around town 25-45mph steady foot: 10-14 Hg (good mpg here)
Slight need to accelerate when passing 25-45mph gradually adding approx 30% more throttle: INSTANT 5-7 PSI (pshhhhhheeeee)
Getting on freeway from a stop(mash pedal): INSTANT 14 PSI with screechin tires then slowly drops to 12 and stays until I let off throttle at 65MPH.
Cruising on freeway 65MPH flat area(steady foot): 10-12Hg
Cruising on freeway 65MPH slight incline(throttle as needed): 4-8Hg
Passing on Freeway from 60MPH no downshift gradually adding approx 30%-40% throttle: hits 10-12PSI quick
Passing on Freeway from 65MPH w/downshift and WOT: INSTANT 14PSI just before downshift then drops to 8PSI and climbs right back to ~12PSI

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2003 PTCruiser GT
Mods:!Airbox silencers
K&N Filter(2153)
Autometer Pod - Boost/Vac and Volts
Hallman ES Boost Controller running 12PSI steady 14PSI peak