2012 Legacy GT

While the Throttle by Wire system used in the newer Subaru WRX and STi is sometimes a bit odd, with a “lazy” curve that doesn’t open the throttle much when you press down on the gas pedal, the new Legacy GT goes one step further, it doesn’t go to 100% throttle, at all, for much of the RPM range.

Throttle map

This was verified by data logging.

Throttle opening

I suspect this was done as a means to reduce torque by reducing boost with a partially closed throttle. Baseline dyno data is shown below:

HP and Torque
2012 LGT baseline

Boost and AFR
2012 LGT stock Boost AFR

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