Do you know what is a throttle booster?
Its actually shortens the travel distance of your pedal, it does not add any more power to your car. For example, you push 20% on the pedal, the booster pushes 40-50% the accelerator. You feel like there's more pickup, but actually you can do the same by pushing the pedal 40-50%. Thats just an example, I dont know how much is the actual percentage.