AMP EFI MS3Pro - Boost Control Common Settings; Boost Control Settings

7.6 Boost / VVT 7 ADDITIONAL ITEMS: BEYOND BASIC FUEL AND IGNITION CONTROL
7.6.2 Boost control settings
7.6.2.1 Boost control common settings This section covers settings that are used by both the open-loop and
closed-loop control algorithms.
• Boost Control Enabled - This controls whether the boost control feature is enabled or disabled.
• System Type - Single solenoid uses one solenoid, plumbed to supply pressure from the turbine outlet to
the wastegate. Dome control uses a CO
2
or compressed air reservoir, a sensor to monitor wastegate dome
pressure, and two solenoids, one to fill the dome and one to empty it. Additional settings related to dome
control will appear under Wastegate Dome Pressure Control Settings 1.
• Solenoid Frequency Range - This setting controls the frequency range of the valve. Mid range allows 12 to
1021 Hz, while Slow allows 11.1 to 78 Hz but allows you to use a wider variety of pins (such as more unused
injector outputs) for boost control.
• Solenoid Frequency - Note that there are two drop down menus depending on whether you are using Mid
or Slow mode. This sets how many times to pulse the boost control solenoid off or on. Many boost control
solenoids work well from 19.5 to 78 Hz, depending on the valve - we typically recommend 19.5 to 39 Hz for
the boost control solenoid we sell.
• Boost Control Pin - This sets which output pin is used to control the boost control solenoid.
• Output Polarity - This is used to set the polarity of the output. Normal is used when you have a conventionally
set up boost control solenoid designed to go to minimum boost if it loses power as a fail-safe; with this setting,
higher duty cycle means higher levels of boost. Inverted means that increasing the duty cycle decreases the
boost.
• Control Interval - This setting is used to control how often the boost control algorithm runs.
• Closed Duty - This setting controls the lowest allowed reported duty. Normally, this should be 0%.
• Open Duty - This setting controls the highest allowed reported duty. Normally, this should be 100%.
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 202