76
Note that the speed and retard curves shown on the graph form speed and retard zones. They have the following
characteristics:
When below the curve A, there is no retard applied to the engine;
When the speed/RPM is equal to the programmed curve A, the ignition retard is equal to the programmed in
curve A;
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.
/RPM programmed is overcoming the curve B, the ignition retarded is equal to the programmed in
curve B.
21.12 Pro-Nitrous
This feature controls up to 6 time based nitrous stages, with individual
settings for each stage.
Pro-Nitrous settings
To active the Pro-Nitrous it is mandatory fulfil 4 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.
4- RPM must be inside RPM activation window.
With these 4 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.
FuelTech FT500 allows firing the solenoids by switching 12V or 0V (ground), which must be setup in the grays or
yellow outputs.
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
-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.
In Pro-Nitrous stages are the options to turn on and off each stage.
To Next Page
Loading...