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VE-Based Speed Density

The Speed Density (SD) system implements a Volumetric Efficiency Map (VE Map) to calculate Mass Air Flow (MAF). This is very useful when running custom intakes or high-power cars where the MAF reading exceeds the sensor range.
 
The SD Control is similar to previous BRZ, STI, and GT-R variants but DIT has the addition of MAF Voltage as a threshold option for the hybrid control of switching between MAF and SD.
 
The SD Map has been calibrated against the WRX and can be enabled to help with the aftermarket MAF scaling. Just be sure to include the custom EcuTek MAF sensor parameter.




More Information

The new volumetric efficiency (VE) based speed density feature changes the way the engine load is calculated. When speed density mode is activated the ECU will disregard the MAF sensor reading and will instead calculate mass airflow based on the engine speed, manifold pressure and air temperature

 
A hybrid MAF and speed density system can also be implemented to aid accurate readings at low speed and provide maximum calibration at high power levels. A range of hybrid mode activation options are available for engine speed, mass air flow or manifold pressure along with calculated charge or dedicated charge air temperature compensation factors.

Speed Density can be toggled in any map switch modes, and a hybrid MAF and Speed Density system can be implemented to aid accurate readings at low speed and provide maximum calibration at high power levels. A range of activation options are available for Engine Speed, Mass Air Flow or Manifold Pressure.

DIT-SpeedDensity-Maps-(1).png



This video tutorial shows the setup and tuning of the speed density system for RaceROM.



To view the other available RaceROM Features, please use the menu to the right entitled RaceROM Features.




 

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