AEM 30-6050 Series 2 Plug & Play EMS - Manual (Page 6)

Page 6 of 13
EMS Fuel Map, Boost Fuel Trim Table
The 30-6100 maps provided utilize the
“Boost Fuel Trim Table” to provide a 1:1 fuel
compensation above and below atmospheric pressure. In the startup calibration, the
“Boost Fuel TrimTable” is configured to provide twice as much fuel when the manifold
pressure is twice as high and half the fuel when the manifold pressure is half as high; this
should help simplify the tuning process for different vacuum and boost levels. Notice the
values in the main
“Fuel Map” do not change above 100 kPa (0 psi boost), the fuel
correction is being made by the
“Boost Fuel Trim Table.” Note: the “Boost Fuel Trim
Table” must be adjusted if a different MAP sensor is installed or if the Load breakpoints
are adjusted. The Boost Fuel Correct value should be set to -90 at 10kPa, 0 at 100 kPa,
+100 at 200 kPa, +200 at 300 kPa, etc…
S2000 Engine Coolant Temperature Gauge (ECT) Functionality
For customers interested in using the Honda S2000 gauge cluster, please note that the
30-6050 EMS is configured to drive the factory S2000 ECT gauge by sending the
appropriate signal on pin A1. This signal is calibrated to use the OEM Honda S2000
engine coolant sensor and may not be accurate if used with OEM coolant sensors from
the Civic or Integra.
Solution for distribut ed ignition ‘kick back’ when cranking:
With the Series 1 EMS, some vehicles would experience erratic ignition timing at low
RPM. The most noticeable symptom would be an engine that ‘kicks back’ when cranking,
and in some cases the EMS would count timing er
rors or lose ‘Stat Sync’ at low engine
speeds.
These problems have been eliminated by adjusting calibration settings in Series 2 Honda
EMS startup calibrations, but could be re-introduced by converting Series 1 calibrations or
copying values from Series 1 calibrations. If users wish to convert old Series 1 calibrations
for use with the new Series 2 EMS, please ensure that the following options and tables
match the Series 2 startup calibration:
Crank H Sens Below, Crank L Sens Above, Cam(T2) H Sens Below,
Cam(T2) L Sens Above, Coil Dwell Factor, Dwell Max, Dwell Min,
Dwell vs RPM (table), Dwell vs Batt Volts (table)