FT500 SFI / FT500LITE SFI
19
RPM for engine start
: set up a RPM limit above which the start-up
routines are disabled. Below this RPM, all the injection, ignition and
actuator positions set up for engine start are used.
7.2 RPM signal
RPM signal is the most important information to run the engine properly.
This menu is where the RPM input will be set up.
RPM signal 1/4
36-1 (crank)
Option selection:
36-2 (crank)
48-2 (crank)
60-2 (crank)
Custom
Engines with crank trigger:
select the crank trigger pattern.
Select the crank trigger or distributor pattern. In case of a crank trigger
without missing tooth and multi-coils, a cam sync sensor is required.
When using a single coil, the cam sync sensor is not mandatory. A
several options of standard patterns are available for using with multi-
coils or distributor based systems.
RPM Sensor
Select the RPM sensor used on the vehicle, VR or Hall Effect.
Crank Ref. Sensor
Edge
RPM signal 2/4
Type
Hall/
with pull-up
VR
Rising Edge
Falling Edge
VR Differential
VR internal ref.
VR internal ref:
this option may only be selected when using a FT500
/ FT500 LITE on an installation previously made for older ECUs of FT
line (FT300, FT350 or FT400), where the shielded cable is a single
way (white wire + shield).
VR Differential:
Standard option for FT500 / FT500 LITE. Select this
for VR sensors; it’s less susceptible to eletromagnetic interference.
When the crank trigger signal is splited with the OEM ECU this option
is mandatory.
Hall/VR with pull-up:
Select when using Hall effect RPM sensor or
when experiencing problems with electromagnetic interference.
RPM Signal Edge:
this option changes the way the ECU reads the
RPM signal. As there’s no simple way of telling which one is the correct
option (without an oscilloscope), select the option Standard (Falling
Edge). If the ECU catches no RPM signal during initial startup, change
this parameter to Inverted (Rising Edge)
First tooth alignment:
set here the crank trigger alignment related to
the TDC. This alignment can be checked by turning the engine to the
cylinder #1 TDC and counting, counterclockwise, angle distance, from
the crank trigger gap to the RPM sensor. If there crank trigger has no
gap, the angle distance is from the previous teeth to the RPM sensor.
NOTE:
If the distributor windows has 60º, this is the value
you must enter in this menu.
For engines with distributor and Crank trigger, check our Technical
Support for information about the alignment in use.
Engine setup 6/6
When the engine
is
RPM
lower than this value,
the
assumes the start-up
ECU
routines. Above this
,
RPM
values of injection, ignition
and actuators position are the
ones set up on the maps.
RPM for
engine start
400
RPM
Accel fuel enrichment
: use this parameter set up as TPS always when
possible, as this sensor is faster than the MAP sensor to indicate a
quick change of position in the throttle.
Engine settings
