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UltraGauge
Blue
™
User Manual www.ultra-gauge.com
Boost Pressure
Gauge name
Range
Units
Abbreviation
Boost Pressure
-14.60 to 22.50
PSI
Boost
-101 to 155
kPa
Boost pressure is the pressure inside the intake manifold relative to atmospheric pressure. It is
also commonly known as Manifold Gauge Pressure. For vehicles which also support the
Barometric gauge, Boost pressure is relative to the barometric pressure. For vehicles not
supporting a barometric gauge, the ambient barometric pressure is considered to be constant @
14.64 PSI or 101 kPa. Maximum Boost is limited by the OBDII standard and not by
UltraGauge. The limit is 22.5 PSI or 155 kPa
Fuel Pressure
Gauge name
Range
Units
Abbreviation
Fuel Pressure
0 to 111
PSI
Fuel
0 to 765
kPa
Fuel rail pressure at the engine relative to atmosphere (Gauge pressure)
Intake Pressure
(MAP)
Gauge name
Range
Units
Abbreviation
Intake Pres abs
0 to 36.98
PSI
MAP
0 to 255
kPa
Intake Manifold Absolute Pressure (MAP). This is absolute pressure as opposed to being
relative to atmosphere (gauge pressure).
The pressure reported is the pressure above absolute vacuum. When this gauge reports 14.7
PSI, that means the pressure in the manifold is the same as that of outside air (at sea level).
Evaporative Vapor
Pressure
Gauge name
Range
Units
Abbreviation
Evap Vapor
-1.188 to 1.188
PSI
Evap Vapor
-8192 to 8192
Pa
This pressure value is normally obtained from a sensor located in the fuel tank or a sensor in an
evaporative system vapor line.
Fuel Pressure
(Diesel)
Gauge name
Range
Units
Abbreviation
Fuel Rail diesel
0 to 95,050
PSI
Fuel Pres
0 to 65535
10kPa
Fuel rail pressure at the engine relative to atmosphere (Gauge pressure), in Pounds per Square
Inch (PSI).
