FT500 SFI / FT500LITE SFI
81
Drag race features
Pro-Nitrous
Pro-Nitrous settings
Pro-Nitrous fuel table
Pro-Nitrous fuel compensation
Pro-Nitrous timing table
•
For speed/RPM between the two curves, the retard is interpolated,
in other words, the more the speed/RPM exceeds the curve A
towards to curve B, the more retarded will be the timing;
• If the speed/RPM programmed is overcoming the curve B, the
ignition retarded is equal to the programmed in curve B.
20.7 Pro-Nitrous
This feature controls up to 6 time based nitrous stages, with individual
settings for each stage.
Disabled
Enabled
Enable function by
Dashboard Switch
Pro-Nitrous switch
Pro-Nitrous settings 2/13
Number of stages
6
Stages activation outputs
Activated at 12V
Activated at 0V
Pro-Nitro 4/14
Turn off with
below:
TPS
90,0
%
Pro-Nitrous settings 11/13
Turn on with
above:
TPS
95,0
%
TPS to Pro-Nitrous activation
Pro-Nitrous settings
To active the Pro-Nitrous it is mandatory fulfil 3 requirements:
1. Active the Pro-Nitrous button (external switch in one of the white
inputs or a dashboard button in FT500 display).
2. The elapsed time after 2-step cannot be more than 15s, otherwise
Pro-Nitrous will not be turned on. In other words, the vehicle must
launch in less than 15s after 2-step deactivation.
3. TPS must be above minimum configured.
With these 3 requirements fulfilled, the Pro-Nitrous stages will start and
follow the configured time. The fuel and timing compensations will also
start at this point. If any condition fail, the Pro-Nitrous is deactivated
and FT500 will use fuel, timing and O2 closed loop main tables.
The first parameter to be set is the enabling mode:
•
Dashoboard button: a touchscreen button in the LCD screen that
can be found in the Dashboard settings menu.
•
External switch: a white input must be used in an external switch.
While the input is grounded, the Pro-Nitrous will be on.
FuelTech FT500 allows firing the solenoids by switching 12V or 0V
(ground), which must be setup in the grays or yellow outputs.
All the Pro-Nitrous inputs and outputs can be set both by touchscreen
or FTManager, in the “Sensor and calibration” menu.
Pro-Nitrous has two different TPS limits. One limit is to turn on with
a minimum TPS, the other is to turn off with a maximum TPS. The
recommend is set the TPS to turn on at least 5% higher than the TPS
to turn off. This way there will be a hysteresis that won’t let Pro-Nitrous
turn on and turn off several times when TPS is around activation TPS.
Also, you will be able to pedal the throttle to get back traction.
The RPM activation window is necessary to protect the engine, not
allowing having a nitrous shot in a low RPM or by deactivating nitrous
before the rev limiter
The Pro-Nitrous timers and delays table gathers the on and off settings
for stages and compensations. A pedalling delay can also be set,
so, if the driver pedals in a run, the Pro-Nitrous can be reactivated
progressivily.
In the FTManager, this table is as shown below.
RPM
+
-
5
3
2
Lowe
8500
8500
6000
6000
Upper
8500
Pro-Nitrous activation window
5000
4
4000
8000
1
2000
8000
Pro-Nitrous settings 12/13
[s]
+
-
5
3
2
Turn off
10,00
4,00
5,95
3,95
Turn on
6,00
Pro-Nitrous Stages
2,00
4
1,00
10,00
1
0,00
10,00
Pro-Nitrous settings 13/13
Pro Nitrous fuel table 1/7
Delay to start fuel compensation
(in seconds)
0,20
3
0,15
4
0,25
2
0,30
1
0,10
5
0,10
6
