Faster response time improves wideband feedback control and can provide a safer, more powerful, and more accurate tune. AEM's Wideband Controllers with X-Digital technology can reduce dead time and improve your vehicle's performance through more accurate AFR tuning. Dead time is the delay between a change in exhaust gas composition and the O2 sensor reporting that change. Although exhaust gas flow can affect dead time, it is not the only cause. Often, the sensing element’s response to the gas is the largest contributor to dead time. When tuning an engine using wideband AFR feedback control, dead time affects the data you are looking at because it is reported for a different operating point than the one at which it occurred. This means any changes you make to the base fueling will likely be out of sync. This can be particularly dangerous in high-cylinder-pressure applications and EFI systems that use feedback control.
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