Edelbrock Pro-Tuner, User Manual

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Appendices 229
MAF Sensor Sensor used to measure mass of incoming combustion air.
Oftentimes,
Mass Airflow sensors contain a thin-film, thermally
isolated bridge structure containing heater and temperature
sensing elements. The bridge structure provides a sensitive
and fast response to the flow of air over the chip.
MAP Manifold Absolute Pressure: Pressure in the engine manifold
measured in reference to a perfect vacuum. 0kPa would refer
to a perfect vacuum and ~100 kPa (+- depending on altitude
and barometric conditions) usually represents atmospheric
normal.
MotoBall A feature that traces the current cell being used by the ECU/
Engine while in the various Maps.
Multiplier A factor used to multiply a value. Usually used to increase or
decrease a value by a percentage. Example: A Warm Up
Fueling Multiplier of 1.32 will increase fueling at the specified
coolant temperature by 32%.
N
Nitrous Oxide An oxide of nitrogen that is injected under pressure into the
engine, usually in the manifold as a power adder due to a
chemical release of extra oxygen. Sometimes referred to a
“supercharger in a bottle”.
Normally Aspirated (NA): An engine that has no forced induction (i.e. no turbo/
supercharger) and relies on atmospheric pressure for cylinder
filling
O
Offline Mode in which you are not connected to the ECU, but can make
calibration changes to various tables and values.
Offset A constant value that is added or subtracted to a value or
equation.
Ordinate Values on a grid axis. Example: RPM and Torque are ordinates
on the Spark Map.
Oxygen Sensor (O2 Sensor): Device that monitors the oxygen levels of the
exhaust gases and feeds the data back to the engine
computer.
A
switching style O2 sensor has a narrow range of accuracy
centered around the stoichiometric point of the fuel being
used. Sensors can be heated or unheated. The heated sensor
in the Pro-Tuner system provides better control than unheated
sensors.
A
wide band style O2 sensor has a linear curve representing a
wide range of air fuel ratios, usually reading from 10:1 up to
18:1 for gasoline. Wide band oxygen sensors are very
accurate, and the preferred choice for dialing in a perfect tune.
P
Port Air Calculated air flow at the intake port.