37
Figure 78
32.1 Basic Fuel
Selecting BASIC FUEL brings up the following menu:
Figure 79
32.1.1 Target AFR
Allows changes to the Target Air/Fuel ratio at idle, cruise, and wide open throttle. The following are typical values and some tuning notes.
Figure 80 Figure 81
Idle Air/Fuel Ratio
– Typically between 13.5 and 15.0. Engines with larger cams may need a richer setting for smoothest idle.
Cruise Air/Fuel Ratio
– Typically between 13.5 and 15.5. Engines with larger cams may need a richer setting for smoothest
operation.
Wide Open Throttle Air/Fuel Ratio (WOT)
– Typically between 12.0 and 13.0. Running richer may reduce power. Running
leaner may reduce power or cause potential engine damage.
NOTE:
The Target Air/Fuel setting between IDLE, CRUISE, and WOT is blended together automatically. Consequently, the air/fuel you
see on the MONITOR screen, may not be exactly what you set for the settings. Changing these settings raises or lowers the
“curve” of that specific area.
Summary of Contents for 550-407
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