Yeah, most decent mapping companies do it too. I know that Nick @ R-tech is a big fan of linear throttle maps.... *ahem*
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The VAG ecu calibrators have to set the pedal load to give the "feeling" of power, lot of power with little driver input. Once mapped the KFPED maps become exaggerated and can end up giving the feeling of an on off switch.
My mate works for jaguar as a calibrator and they set there pedal maps with an axis based on G-force and are setup using an accelerometer sensor to give the feeling of strong pull below x amount of pedal request.. Should be fun to tune..lol
Not the best pic, but this is my linear KFPED map from an Audi TT 1.8T k04 hybrid I am working on tonight. Axis = actual pedal position % v RPM = calculated pedal request which then becomes an axis reading for a load map.
Stock map
You can see where the calculated % is way higher than the actual request.