Spitronics TITAN Standard - 6.7.5.3 Boost Limiter; 6.7.6 Real-time Data and Bars

If you are not sure on the injector sizes, first tune the engine with only the primary injectors.
Choose a certain RPM and load on manifold pressure and set the Vacuum Limit field higher so
that the secondary injectors stay off. Now start with 50% value in the Compensation % field.
Reduce the Vacuum Limit so that the secondary injectors start operating. Adjust the
Compensation % so that the same air fuel ratio is reached. You may need to reduce the vacuum
with the throttle to stop the injectors, while changing the Compensation %.
The Vacuum Limit field is at which manifold pressure the transition must take place. This is
normally when injector percentage goes over 65% opening.
The Activation block will activate the different Hardware Circuits to power the extra injectors. If it
is on Driver then separate drivers on the ECU will be used and wired to the separate injectors. If it
is on GP 1 or 2, it will switch the power to the Injectors via a separate Mosfet Driver. In this
manner the drivers is joined with the primary drivers. Setting GP 1 or 2, will take control of that GP
output above the normal setting in the setup. See the Wiring diagrams for wiring info.
6.7.5.3 Boost Limiter
The TITAN ECU has the feature to limit the fuel and spark when the boost goes higher than this
value. This is very useful to protect the engine against boost control failure. It is also a soft limiter
which will only lose power over the limit value. It can be adjusted in tenths of a bar resolution. The
ECU will first retard the timing in three stages and then after 300 RPM over this limit will cut the
fuel completely. The spark however will not be cut. This will prevent fuel from entering the exhaust
and backfire there.
6.7.6 Real-time Data and Bars
This block displays the current analogue data as it is measured by the ECU for while the engine is
off or running. These values are used to set and tune the ECU correctly for all conditions.
Double click on the gauges to change their appearance between digital and analog.