Output Type

Enables --- (Default = Disabled)

Trim

Enables a function where an external Trim Module can be used to driver adjustment of boost. When enabled the Trim Tab is available. (Default = Disabled)

Scramble Boost

Enables a function where a timed amount of extra boost is allowed via a selected input request to the Elite ECU. When enabled the Scramble Tab is available.

Boost Increase Solenoid Output

Select an available output wire, typically a DPO (Digital Pulsed Output) that will be wired to your Boost Control Solenoid.

LTT Min TPS

Long Term Trim control is active only when the TPS is greater than this amount. This is to ensure learning is only possible during stable boost conditions. (Default = 90)

LTT Min RPM

Long Term Trim control is active only when the RPM is greater than this amount. This is to ensure learning is only possible during stable boost conditions. i.e. to not learn when the Target Pressure is not possible to be reached. (Default = 2500)

LTT Max RPM

Long Term Trim control is active only when the RPM is greater than this amount. This is to ensure learning is only possible during stable boost conditions. i.e. when turbo efficiency can cause the Target Pressure not to be reached. (Default = 7500)

LTT Min Gear

Long Term control is active only when the vehicle is in this gear number or higher. This is to ensure learning is only possible during stable boost conditions, such as a turbo that has not reached operating speed in a lower gear.

Long Term Trim Gain

Controls the rate at which the Long Term control can make corrections to the Long Term Trim table. Larger numbers will learn faster but can cause oscillations, and smaller numbers will make corrections at a slower rate. Up to 3D mapping is available.

Long Term Trim

This table shows the amount of Long Term correction that has been learned over time to correct for inaccurate setting of the Base Duty table. This table is user definable for axis values, however the axis channels are fixed to be the same as are used for the Closed Loop Base Duty Cycle table. This table can be adjusted by the tuner simultaneously whilst the Long Term Control is making changes. Up to 4D mapping is available.

Open Loop

Open Loop does not use a Target, rather it is a raw amount of duty that the user commands and boost level is tuned by varying this duty.

Closed Loop

Closed Loop Boost Control uses a Target Pressure that the Boost Control system will try to achieve by adjusting duty up or down.

Manifold Pressure

This is the most common selection for Controlled Parameter, and should be used most of the time.

Waste-gate Pressure

Some specific applications, such as drag racing, will use wastegate pressure control in order to control the boost pressure. This relies on the target pressure being set appropriately for the circumstances, as the control system is no longer looking at Manifold Pressure. Wastegate Pressure is used for CO2 two-solenoid control systems.

Obviously, in order to control the wastegate pressure, a wastegate pressure sensor must be used.

Boost Pressure

Some specific applications will use wastegate pressure control in order to control the boost pressure. A boost pressure sensor must be enabled and configured to set Boost Pressure as the Controlled Parameter.

Closed Loop Base Duty Cycle

Only active when Output Type is selected as One Solenoid. The amount of duty cycle required to make the Boost Pressure reach the Target Pressure. This table is to be adjusted if the boost pressure is not reaching or is exceeding the desired Target Pressure. Up to 4D mapping is available.

Closed Loop Target Pressure

The amount of desired boost pressure to be targeted by the boost control system. Up to 4D mapping is available.

Controller Start Delay

A delay time between meeting the conditions for Short Term control, and when control actually activates. This is to prevent the system from immediately making adjustments when boost may not have stabilised yet. Up to 2D mapping is available.

Closed Loop Proportional, Integral and Derivative Gain

This allows mapping of the PID system, which controls the responsiveness of the Boost Control system. In simple terms, the Proportional controls how fast the system will respond relative to how far it is from the target. The Integral is how aggressive the Proportional changes are. Derivative is used to slow down overshooting the target if the Proportional has been aggressively tuned. Up to 3D mapping is available for all PID tables.

Open Loop Base Duty Cycle

Only active when Open Loop is selected as the Mode. This is the duty cycle to be used by the Boost Control system, and should be adjusted to reach the desired amount of boost. No boost target is used in Open Loop and the ECU does not make adjustments to the duty other than what is commanded by the tuner. Up to 4D mapping is available.

Duty Cycle Overall Correction

When the Mode is set to Closed Loop this will be an overall negative correction to the Target Pressure. When the Mode is set to Open Loop this will be an overall positive or negative correction to the Duty Cycle.

Duty Cycle Air Temp Correction

This table allows for correction to the Base Duty for changes in Air Temperature. Typically hotter air requires slightly more duty, and colder air requires slightly less duty. Up to 2D tuning is available.

Duty Cycle Coolant Temp Correction

This table allows for correction to the Base Duty for changes in Coolant Temperature, over a 2D table.

Duty Cycle Gear Correction

This table allows for correction to the Base Duty for changes in Gear Position, over a 2D table.

Duty Cycle TPS Correction

This table allows for correction to the Base Duty for changes in Throttle Position, over a 2D table.

Duty Cycle Flex Fuel Composition Correction

This table allows for correction to the Base Duty for changes in Flex Fuel Composition (ethanol percentage), over a 2D table.

Duty Cycle Generic Correction

When enabled the Duty Cycle Generic Correction tab will become available. This table allows for any ECU channel to be used for boost control duty correction mapping. Up to 3D mapping is available.

Target Pressure Overall Correction

Target Pressure Air Temp Correction

This table allows for a Target Boost correction based on the Air Temperature. This is typically used to add an added level of engine safety by allowing the Target Boost to be lowered for excessively hot intake air temperatures if desired. This is a 2D table.

Target Pressure Coolant Temp Correction

This table allows for a Target Boost correction based on the Coolant Temperature. This is typically used to add an added level of engine safety by allowing the Target Boost to be lowered for excessively hot Coolant Temperatures or for cold engines if desired. This is a 2D table.

Target Pressure Gear Correction

This table allows for a Target Boost correction based on the Gear Position. This is typically used for lowering the Target Boost in the lower gears to assist with traction.. This is a 2D table.

Target Pressure TPS Correction

This table allows for a Target Boost correction based on the Throttle Position. This is typically used to lower the Target Boost at smaller throttle openings to give the engine a more linear power response to throttle opening. This is a 2D table.

Target Pressure Flex Fuel Composition Correction

This table allows for a Target Boost correction based on the Ethanol%. This is typically used to increase the Target Boost when there is a higher ethanol percentage in the system for added performance. This is a 2D table.

Target Pressure Generic Correction

When enabled the Target Pressure Generic Correction tab will become available. This table allows for a Generic Correction to the Duty Output based on any Custom conditions that the tuner requires. Up to 3D mapping is available.

Trim Max

When the Mode is set to Closed Loop this is the maximum amount of boost target pressure reduction allowed by the external Trim. When the Mode is set to Open Loop this is the maximum percentage amount of reduction of the duty cycle allowed by the external Trim. (Default = -100)

Target Offset

Active only when the Mode is set to Closed Loop. This is the amount of extra boost pressure to be added onto the Target Pressure while the Scramble Boost function is active.

Base Offset

The amount of extra duty cycle to be added to the boost control duty cycle while the Scramble Boost function is active. When the Mode is set to Closed Loop this value should be “0” and the Closed Loop Base Duty Cycle table should be set accordingly for the extra target pressure that is to be added.

Hold Time

Additional boost is applied as soon as the Scramble Boost button is pressed but will remain active for this amount of time after the Scramble Boost button is released.

Max Time

The maximum total amount of time that the Scramble Boost can be applied.

Tuning Notes

Based on this table, when using Setting 1 (Target is 10psi), the system will use 15% duty to reach this target boost amount. If this is not correct, the column for 10psi only must be adjusted until the boost pressure (read from the Controlled Parameter chosen in the Boost Control Tab of the Function Page) does reach 10psi. All other values in all other columns have no impact at all on the controller at this time.

When using Setting 2 (Target is 16psi), the system will use 38% duty to try to reach 16psi. If this is not correct, the column for 16psi only must be adjusted until the boost pressure (read from the Controlled Parameter chosen in the Boost Control Tab of the Function Page) does reach 16psi. All other values in all other columns have no impact at all on the controller at this time.

When using Setting 3 (Target varies between 18psi and 20psi), the system will use 46% duty until 5000 rpm to try to reach the 18psi target boost. From 5000 rpm it will then use 54% duty to try and reach 20psi boost. In this case, only the 18psi column should be adjusted with the engine running under 5000 rpm, and only the 20psi column should be adjusted with the engine running above 5000rpm.

NOTE: Changing the horizontal axis from Boost Control Target Pressure to simply Manifold Pressure does not give the system a way to know a starting point to get to the Target, as can be seen by the above description of how the system works. Also, setting the entire table to be one value means that the system will only reach a single target accurately and all other targets cannot be reached correctly.