A sudden throttle opening floods the engine with air faster than the normal fuel calculation can react. Transient Throttle Enhancement covers that gap by adding fuel, and on an Elite it has two ways to do it:
| Method | How the fuel is added | Strength |
|---|---|---|
| Synchronous enrichment | Makes the injector pulses that were already scheduled longer | Smooth, and stays in step with the normal injection timing |
| Asynchronous enrichment | Fires additional injector pulses on top of the normal ones | Doesn't have to wait for the next scheduled pulse, so it can respond faster to a sudden stab |
How much each method contributes depends on the engine and injector setup, so there's no one right split. Extra asynchronous pulses are useful when the engine stumbles or goes lean in the instant after a sharp throttle input, especially at low RPM where the gap between scheduled pulses is longest. Log lambda through quick throttle movements and adjust one method at a time so you can see what each change does.
For the tuning process, see transient throttle enhancement, delta load and the transient enrichment tuning guide.
