7.8 Advanced Engine 7 ADDITIONAL ITEMS: BEYOND BASIC FUEL AND IGNITION CONTROL
• Enable water/meth injection - enables or disables the feature.
• Pump Output - output pin to control pump relay.
• Valve style - select
– "Off" - no valve output (used fixed nozzle)
– "Slow" - slow speed valve output with chosen PWM duty cycle
– "Fast" - valve switches at injector speed with chosen PWM duty cycle
• Valve Output - output pin to control water valve.
• Frequency - selects the output frequency to the valve. (Slow mode only.)
Enable when...
• TPS > - enable when TPS is above this %age
• RPM > - enable when RPM is above this value
• MAP > - enable when MAP is above this value
• MAT > - enable when MAT is above this value
• Low fluid level input - This allows using a level switch on an input pin connected to the MS3Pro. The switch
must be wired so it grounds the input when the fluid level is OK and un-grounds the input when the fluid falls
below an unsafe level. If the level switch sends a low level signal when the MS3Pro needs to enable water
injection, the MS3Pro will behave as if it has been shut down from the AFR Safety feature.
The 3D table controls the valve duty cycle as a function of RPM and MAP sensor readings.
Water injection will almost certainly alter your reported AFRs, and you should therefore ensure that closed-loop
EGO control is not operating when water injection is active. Set the EGO control so that open-loop mode is used
at the boost levels where you plan to enable water injection.
7.8.20 High Power Time Enrichment
Engines that run flat out for long periods of time often require a richer air/fuel ratio than what would make best
power. This is needed to cool down the combustion chambers and reduce the vulnerability to detonation. MS3Pro
allows ramping up the air/fuel ratio during sustained full throttle operation so that you can tune for a maximum
power air/fuel ratio, then add fueling if the engine stays under power. Applications that can benefit from this
include:
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 253
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