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This 1D map specifies that Speed Density mode should only be used above the given Manifold Pressure. The ECU will switch from MAF sensors to Speed Density when the MAP rises above the first value. It will switch back to MAF sensors when the MAP falls below the second value. This map works in combination with the Activation MAF and RPM maps.
Torque - Transmission Torque Limits
This RaceROM function rescales the torque request sent to the ECM from the transmission, this is useful for low gear/speed torque limit removal and for compensation for cars with greatly increased torque (like supercharged engines) to control drivability.
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These maps multiply and offset the incoming request by the values specified in the map (mimicking the OEM scaling values). There are two types of torque reduction for Nissans
a fast (ignition and fuel cut)
and slow type (throttle and boost)
For which the specific sets of torque limit adjustment maps are available for. these maps either multiply or offset the incoming value of torque sent by the TCM, the limit can be logged using the Torque Reduction Request 1 & 2 Parameters.
Torque Request Multipliers
These values are per gear (up to 9 speeds) and multiply the incoming value as per
Torque for limits = Transmission Torque Reduction request #1/#2 x Multiplier value (for current mode & gear)
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there are individual maps for Normal steady state running, during up shift and during downshift allowing each component to be tuned to deliver acceptable drivability.
Torque Reduction Request Offsets
These values are per gear (up to 9 speeds) and add a Nm value the incoming torque reduction request value as per
Torque for limits = Transmission Torque Reduction request #1/#2 + Offset value (for current mode & gear)
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there are individual maps for Normal steady state running, during up shift and during downshift allowing each component to be tuned to deliver acceptable drivability.
This is useful for burnouts etc where the torque limit can be increase in 1st ear allowing full torque to be demanded.
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Only offsetting first gears maintains the other torque limits from the TCM that close the throttle on shifts and overrun etc.
Valet Mode
Valet mode has been included to allow restrictions to be enforced when the car is not under your control.
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