Edelbrock Pro-Tuner, User Manual

Page: 116 / 235

116
4.3.1 Base Fuel Map
Visit us at: http://www.edelbrock.com
Base Fuel Map
The Base Fuel Map is used to define fuel injector pulsewidth as a function of either
manifold absolute pressure (MAP) or Throttle Position (TPS). A MAP-N tuning strategy
uses MAP as the load axis. An Alpha-N tuning strategy uses TPS as the load axis.
Complete the mapping by manually smoothing points and blending in the corners (which
are often difficult to operate at when calibrating.) Avoid step changes or inconsistent
values, as this will cause erratic running. Another tip to optimize the idle is to flatten the
map slightly in the area that the engine typically idles in. This smoothes the idle by
preventing major airflow changes as the engine moves around the cells at idle. Use the
MotoBall feature to see where the engine is operating in the map.
Typical Fuel Map areas of operation