SM4 Manual
by
MRM-Racing
V3.0
82
Variable Cam Setup
Variable camshaft setup.
Sets the error tolerance and camshaft offsets.
NOTE: Need to setup the "I/P HSI" channel and GPC(General purpose control) for
camshaft feedback.
Gearing Ratios
Gearing Ratios are set for each gear so the SM4 can determine which gear is in use.
Used for different boost maps on different gears, Traction control and displaying selected
gears in the log.
The value corresponds to vehicle Kph at 1000 rpm in each gear.
Example:-
Diff ratio = 4.10
Gear ratio = 3.874
Tyre rolling = 2.1 meter each turn
(1000 / 4.10 / 3.874) x 2.1 = 132.2 meter/min
(132.2 x 60 / 1000) 7.93 Kph/1000 RPM
Air flow Sensor
Air flow sensor are set up here, consult your dealer.
Limp Home Tables
Limp Home tables are used as a backup in case of sensor failure.
Setup limp home tables
1. Manifold pressure
2. Throttle position (TPS)
3. Exhaust back pressure(EBP)
•
Coolant temperature limp home is setup under "I/P Analogs", "I/P Coolant".
Limp home Manifold
Calibration table that allows the throttle position sensor to act as a back-up in the
event of a pressure sensor failure, thus ensuring almost normal engine operation.
This is used for limp home in applications where pressure is the primary engine
load input.
Limp home TPS
Calibration table that provides a limp-home function if the throttle position sensor
is faulty. This table uses the same engine speed calibration sites as the manifold
pressure failure table limp-home table. Calibration range is 0 to 100% in 0.1 %
increments.
Limp Home EBP
Calibration table that allows the manifold absolute pressure sensor to act as a
back up in the event of this pressure sensor failure, thus ensuring almost normal
