Just ordered a sprintbooster...

jm1fd

On our cars, the "throttle blades" in the throttle bodies are 100% open all the time unless traction control needs to cut engine power, or vacuum needs to be generated for the brake booster. The pedal causes the computer to alter intake valve duration and lift via the VVEL stepper motors on each cylinder head.

This doo-hickey alters the voltage output curve of the throttle pedal. That's all it can do. It simply makes 10% pedal travel look electrically like 20% pedal travel to the ECU. Any delays built into the ECU's programming are still there.

Remember Toyota's sudden unintended acceleration debacle?
What happens if this doo-hickey goes into a fault condition and sends a 100% throttle signal to the ECU? It is plugged into all the right wires to be able to do so.