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Page 33/63 UltraGauge™ EM User Manual www.ultra-gauge.com
Volumetric Efficiency %
(MAP vehicles only)
Gauge name Range Units Abbreviation
VE
(MAP vehicles only)
0 to 100 % VE %
Volumetric efficiency is a measure of how fully your vehicle can fill its cylinders with the fuel/air mixture on the intake stroke.
For example, a vehicle with a VE of 50% is able to fill its cylinder with 50% of it potential. UltraGauge uses several engine
sensors to determine the VE dynamically. This Gauge is only shown if the MAP sensor is present.
If Adaptive Volumetric Efficiency has been enabled, this gauge will provide the Volumetric Efficiency percentage in real time.
Adaptive Volumetric Efficiency can be controlled via the menu system by selecting:
MENU Vehicle Setup ..
VE Enable (MAP only)
MENU Vehicle Setup ..
VE RPM (MAP only)
To determine if your vehicle uses a MAP sensor, access the menu; MENU
UltraGauge Setup..
Version. This will display
MPG sensor: ECU, MAP, MAF or None
UltraGauge
Temperature
Gauge name Range Units Abbreviation
UG Temperature 0 to 232
ºF UG ºF
UG Temperature 0 to 111
ºC UG ºC
Internal temperature of UltraGauge. Avoid possible malfunction or damage to the display due to high dash
temperatures on sunny summer days. By default the high alarm is enabled and set to 145 ºF. UltraGauge will
continue to operate even when extreme high temperature is present. Due to internal heating, it is common for this
gauge to report temperatures in the range of 125 -130 ºF on a bright day, while mounted on the dash in sunlight,
when the cabin temperature is 75-80 ºF. If temperatures in excess of 140ºF are seen, check that the cooling vents
are not blocked. If the temperature rises above 140ºF, the Backlighting will automatically dim to 65%. The
backlighting is the primary source of internal heat and a temporary reduction to 65% will greatly reduce the
temperature. Setting the Max Backlighting to a value of 80% or less is recommended. Generally the amount of
additional light produced when set above 80% is difficult to perceive. UltraGauge will naturally cool down as the
interior of the vehicle is cooled. Setting the vehicle’s vent controls to defrost will direct cool air to the dash area
and more quickly cool UltraGauge. While UltraGauge is designed to operate under elevated temperatures, some
customers have painted the back half of UltraGauge white to reflect the heat of the sun. This can result in a
significant decrease in temperature when UltraGauge is dash mounted. This is more for peace of mind and is not
necessary.
NOTE: When the vehicle is started, after being off for more than 15 minutes, The UltraGauge Temperature will
approximately equal the cabin/dash temperature. The internal backlighting circuits, having been activated by the
vehicle start, will then cause UltraGauge’s internal temperature to slowly increase above cabin temperature.
UltraGauge
Battery
Voltage
Gauge name Range Units Abbreviation
UG Battery Voltage 6.00-25.00V
volts
UG volt
Vehicle battery voltage is passed through a fuse and delivered to pin 16 of the vehicle’s OBDII connector.
UltraGauge measures this voltage and displays it as UltraGauge Battery Voltage. For all intents and purposes
UltraGauge Battery Voltage and the vehicle’s Battery voltage are equivalent. As the battery voltage decreases, a
point is reached where UltraGauge and the vehicle’s computer will no longer function. Battery voltage accuracy
is typically +- 1% of reading
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