Can this be use as to improve fuel consumption? If can, how much can save? better than vs?

https://fbcdn-sphotos-a.akamaihd.net/hphoto...774676221_n.jpg 
Why driving harder is not the same as what you can gain from using ETC in Sport mode? It's all about 'throttling rate' - the slope of the throttle graph (above).

The ECU reads how aggressive the pedal is depressed and interpret this as 'throttling rate', or pedal deflection rate. Higher throttling rate triggers aggressive ignition timing advance, thus improving the power output of the engine in response to the footwork.

The sensation of the relationship between footwork and engine behavior, is called throttle response. Good throttle response is described as getting satisfactory engine response while being light footed.

Being heavy footed without modifying the throttle graph may achieve the same throttling rate. However, this doesn't make the throttle more responsive, you are just driving it harder.

https://fbcdn-sphotos-a.akamaihd.net/hphoto...368542449_n.jpg 
Why "throttle off-set adjustment a.k.a. PDT" (famous among campro users) is different from a proper ETC (electronic throttle controller)?

What's "throttle offset adjustment"? Forcing the ECU to learn a lower V as 0% pedal depression. Result is that, at 0% actual depression, ECU is reading it as 'being depressed at a certain %". At any deeper depression, the ECU reads higher.

1) Effect is minimal for a problem-free adjustment
2) Can only reduce throttle lag, not the signal profile.
2) Greater effect comes with draw-backs.
3) No on-the-fly adjustment

This is a factory default 'trick' for the service engineer to solve unstable idling, not a S.O.P. to improve the throttle response.

JUST LIKE ADJUSTING THE CABLE FREE PLAY.

https://fbcdn-sphotos-a.akamaihd.net/hphoto...072129914_n.jpg 
The mechanical-equivalent of electronic throttle controller (ETC) is an undersized throttle pulley, NOT by adjusting the throttle cable free play.

https://fbcdn-sphotos-a.akamaihd.net/hphoto...774676221_n.jpg 
Why driving harder is not the same as what you can gain from using ETC in Sport mode? It's all about 'throttling rate' - the slope of the throttle graph (above).

The ECU reads how aggressive the pedal is depressed and interpret this as 'throttling rate', or pedal deflection rate. Higher throttling rate triggers aggressive ignition timing advance, thus improving the power output of the engine in response to the footwork.

The sensation of the relationship between footwork and engine behavior, is called throttle response. Good throttle response is described as getting satisfactory engine response while being light footed.

Being heavy footed without modifying the throttle graph may achieve the same throttling rate. However, this doesn't make the throttle more responsive, you are just driving it harder.

https://fbcdn-sphotos-a.akamaihd.net/hphoto...368542449_n.jpg 
Why "throttle off-set adjustment a.k.a. PDT" (famous among campro users) is different from a proper ETC (electronic throttle controller)?

What's "throttle offset adjustment"? Forcing the ECU to learn a lower V as 0% pedal depression. Result is that, at 0% actual depression, ECU is reading it as 'being depressed at a certain %". At any deeper depression, the ECU reads higher.

1) Effect is minimal for a problem-free adjustment
2) Can only reduce throttle lag, not the signal profile.
2) Greater effect comes with draw-backs.
3) No on-the-fly adjustment

This is a factory default 'trick' for the service engineer to solve unstable idling, not a S.O.P. to improve the throttle response.

JUST LIKE ADJUSTING THE CABLE FREE PLAY.

https://fbcdn-sphotos-a.akamaihd.net/hphoto...072129914_n.jpg 
The mechanical-equivalent of electronic throttle controller (ETC) is an undersized throttle pulley, NOT by adjusting the throttle cable free play.

I feel although Throttle controllers offer no power gain, however enhancing the throttle to achieve greater respond will improve lap times.

Imagine the time you need to depress 2/3 of the pedal & wait for your car to respond whereas with a throttle controller you needed only a fraction of the time to do that.