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Page 38/55 UltraGauge™ EM User Manual www.ultra-gauge.com
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MENU
Vehicle Setup ..
VE Enable (MAP vehicles only)
Enables Adaptive Volumetric Efficiency. Vehicles use either a Manifold Absolute Pressure (MAP) sensor or a Mass Air Flow
(MAF) sensor to determine fuel mixture* Mileage calculations with MAF are much more accurate than with MAP. One issue
with MAP is that it is necessary to know the volumetric efficiency(VE) of the engine. Volumetric efficiency (VE) is the
measure of the ability to fully fill the cylinders with the fuel/air mixture. VE is different for each engine design. An engine with
a 50% VE is one that is able to fill to 50% of capacity on the intake stroke.
Normally when Adaptive VE is not enabled, the VE is automatically set to a fixed average. With Adaptive VE enabled, the VE
is automatically adjusted dynamically based upon run time conditions to more accurately determine mileage. For MAP
vehicles, the VE can be monitored through the VE gauge. This feature should remain disabled for vehicles that are
supercharged or turbo-charged. If enabled, also set the RPM at which the engine achieves peak torque. See
VE RPM
for
additional details. The VE% gauge is visible only when a MAP sensor is present in the vehicle.
If enabled, it will then be necessary to run the MPG calibration to achieve best accuracy. For most vehicles Adaptive
Volumetric Efficiency will provide improved accuracy of the MPG, Fuel Level, TTE and DTE gauges. In rare cases the
adaptive VE may result in less accurate results, in which case it should be disabled.
*To determine if your vehicle uses a MAP or a MAF sensor, access the menu system;
MENU
UltraGauge Setup..
Version.
This will display
MPG sensor:
MAP
,
MAF
or
None
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Vehicle Setup ..
VE RPM (MAP vehicles only)
When Adaptive Volumetric Efficiency is enabled, VE RPM is used to fine-tune VE for your vehicle. Input the RPM at which
your vehicle’s torque peaks. Typically presented in the form XXX ft-lbs @ RPM, this parameter is commonly specified for
most engines and can be found on automotive sites such as vehix.com. Search for your specific vehicle and then find the
engine specifications section.
By default this value is set to 4400 RPMs. This value is ignored for MAF vehicles and when Adaptive Volumetric Efficiency is
disabled. VE may be monitored through the VE gauge. This gauge is only visible for vehicles with MAP sensors..
If after calibration, it is found that the MPG results are still not accurate enough, the VE RPM value can be further adjusted. If
UltraGauge reports less fuel used than actual, reduce the VE RPM by 200 and repeat Calibration. Likewise, if UltraGauge
reports more fuel used than actual, increase the VE RPM by 200. The value is arbitrary and experimentation is necessary.
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Vehicle Setup ..
More ..
Set HP1 Max Torque
Sets the maximum engine torque for the target vehicle. This parameter must first be configured prior to using HP1, KW1 or
Torque 1 gauges. The maximum torque is a common parameter that can be found by searching the internet for the engine
specification for your vehicle. The torque is commonly specified as a Torque @ a particular RPM. For example, 200 ft.lbs @
3200 RPM. The torque may be entered in Foot-Pounds (ft.lbs) or Newton Meters (Nm).
NOTE: In order for the HP1 or TRQ1 gauge to function, the “%Engine Load” gauge must be placed in the next display
position. For example, If HP1 is at position 2, and TRQ1 is at position 3, then % Engine Load must be placed at position 4.
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MENU
Vehicle Setup ..
More ..
Set HP2 Efficiency
Sets the estimated operating efficiency of the engine. This parameter can be set before using the HP2, KW2 or Torque2
gauges. Horsepower 2, Kilowatts 2 and Torque 2 are derived based on the amount of energy being consumed by the engine and
the engine’s efficiency. By default the efficiency is assumed to be 24%. This means that only 24% of the energy contained in
the fuel actually produces power or torque output. 24% is an good average for typical modern vehicles. This value can be
adjusted if more specific information is available.
