MoTeC M880 - Manual (Page 50)

48 Calibration
Site Tables
The RPM and Load sites for the various calibration tables may be modified in
the Setup Sites screen.
A number of site tables are available which affect different calibration tables.
Use the help to check which calibration tables are effected by which site
tables.
To insert or delete sites use the Tools menu (press the F9 key). When sites
are inserted or deleted the calibration tables may be adjusted so that the new
sites do not affect the tuning.
Dyno
The alternator should be connected while tuning the engine to ensure that the
injectors are working at normal operating voltage.
The exhaust system should be the same as that in the vehicle as it will effect
the engine tuning.
On multi runner intake manifolds the air box should be fitted as it is an integral
part of the intake system and will effect the engine tuning.
The fuel pressure is critical to the injector flow and should be monitored
during dyno tuning. Incorrect fuel pressure will result in incorrect tuning. Note
that on turbo engines the fuel pressure will vary as the manifold pressure
varies because the regulator maintains a fixed pressure above manifold
pressure.
Fuel - Main Table
The Fuel - Main Table allows adjustment of the fuel at various RPM and
Load points.
Work through all the table values systematically so that all points are adjusted
for the correct Air Fuel Ratio reading.
Use extreme caution when adjusting the fuel to ensure that the engine does
not run lean at high loads. It is best to start rich. A temperature compensated
wideband Air Fuel Ratio Meter is essential to ensure correct air fuel ratio.
If the engine is missing for any reason (including over rich) the sensor may
falsely read lean due to the oxygen in the unburnt mixture.