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How exactly does a Sprint Booster Work?

In the old days, the interaction between your pedal pressure and your throttle was immediate. You pressed on the pedal and the throttle cable opens your throttle instantly. You had a direct connection between pedal and throttle.

Today however, your accelerator pedal is connected to a sensor that sends a signal to the ECU (engine control unit). The ECU is connected to a servomotor that operates the throttle in proportion to the input from the accelerator pedal. And because your ECU is “governed”, you get a hesitation called “pedal lag.”

But with a Sprint Booster, when you turn it on, it actually remaps the curve that the pedal is producing giving your throttle instant response.

So, What Exactly Does the Sprint Booster Do?

The short answer is, it is an amplifier, boosting the accelerator pedal sensor signal by about 30% which makes the accelerator pedal about 30% more sensitive.

What Exactly Does the ECU Do?

The ECU does a lot of things.

For example it may:
reduce the pedal sensitivity when driving in reverse.
close the throttle based upon wheel spin, or loss of traction, even if the accelerator pedal is not moved.
limit throttle response in the case of a fault, such as engine overheating.
alter the response of the throttle to the accelerator adapting to the driving style.

It’s a smart tool, but it sure is a limit on pedal accuracy.

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