FT500 SFI / FT500LITE SFI
26
Engine settings
Compression ratio
: used to correctly estimate the timing tables. A
low, medium or high compression ratio is defined according to the fuel
used on the engine and if it is turbocharged or naturally aspirated.
I.e., a 10:1 compression ratio for a naturally aspirated engine using
ethanol is considered a “low compression ratio”. The same ratio for a
turbocharged engine running gasoline will be “high”.
Primary and secondary injector’s total flow
: select the flow of
the injectors responsible for the naturally aspirated/low load range
of the engine.
Initial boost for secondary injectors:
set here the pressure you
want the secondary bank to start opening, usually under boost. This
option is only shown when using two banks of injectors
Camshaft:
select the characteristic of the engine camshaft. When
selecting high profile camshaft, all injection tables from absolute
vacuum until -4.3psi are equal, as this type of camshaft does not have
steady vacuum at idle speed. When selecting low profile camshaft,
the injection times at vacuum phase are filled up in a linear manner.
Now, click the button “Generate FuelTech base map”. The ECU will
show a warning that the current map will be overwritten by the
FuelTech base map.
Do you want to run
the calibration wizard?
TPS not calibrated!
Yes
No
A notice about throttle/pedal calibration will be displayed. Click Yes
and you will be redirected to the calibration screen.
The Chapter 15.1 has detailed information about the calibration.
The next chapters explain other functions contained in the Engine
Settings menu.
7.8 Fuel injectors deadtime
All fuel injectors, as they are electromechanical valves, have an opening
inertia, which means that there is a “dead time”, a moment in which
the injector has already received an opening signal, but still has not
started to inject fuel. This parameter considers, as a standard value,
1.00ms for high impedance fuel injectors. For low impedance injectors
using Peak and Hold driver, set the deadtime to 0.60ms. These are
general values; check this parameter with the injector manufacturer
Fuel injectors deadtime
Secondary
0,800
ms
1,000
ms
Primary
12,0 V
3,600
ms
Ignition dwell
This option sets the ignition coil charging time. There is a dwell table
because the charging time varies according to the battery voltage,
especially in vehicles that do not have alternator.
Usually, the lower the voltage, the higher the dwell time has to be set.
Smart coils (coils with internal igniter) demand lower charging
times. These are general values; check this parameter with the coil
manufacturer.
WARNING:
When using MSD ignition modules, it’s not
possible to control the Dwell time. In this case,
the coil’s changing time is calculated by th MSD
module.
7.10 Map options
On the new FTManager update, it’s possible to choose wich FT unit
is connected to the computer, and the functions that are going to be
activated on the current map.
This allows for easier navigation on the software, reducing the
configuration options to those chosen by the tuner. The functions not
selected on this screen will be hidden from the menu.
In case any function needs to be activated, just access the menu:
engine settings > map options.
7.9 Ignition Dwell
In the FTManager, this parameter is in the Injection menu in “Engine
Settings”.
