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Not much to explain. There's always a certain amount of time between when the AFR changes and when the gauge reports it out. Some of it's from the sensor itself, some from wideband controller interpreting the change and then some from changing the output signal. AEM's new ones are supposed to be some of the fastest, around 20 milliseconds reaction time. On some widebands this can be as high as 0.1 seconds. Not a big deal when you're just watching the gauge, but does matter when tuning.
Here's an overview someone did on the HPTuners forum:
Thanks. I hadn't heard the term "latency" used for that effect. Hysteresis is the common engineering term for the same effect. Always a good day when I learn something new.
Do the AEM gages also record data? I assume sample rate when data logging should also be as fast as feasible or is there a preferred rate?
Not much to explain. There's always a certain amount of time between when the AFR changes and when the gauge reports it out. Some of it's from the sensor itself, some from wideband controller interpreting the change and then some from changing the output signal. AEM's new ones are supposed to be some of the fastest, around 20 milliseconds reaction time. On some widebands this can be as high as 0.1 seconds. Not a big deal when you're just watching the gauge, but does matter when tuning.
Here's an overview someone did on the HPTuners forum:
Thanks!
Originally Posted by danh52
Thanks. I hadn't heard the term "latency" used for that effect. Hysteresis is the common engineering term for the same effect. Always a good day when I learn something new.
Do the AEM gages also record data? I assume sample rate when data logging should also be as fast as feasible or is there a preferred rate?
This particular gauge does not data log, some of them do.
Thanks. I hadn't heard the term "latency" used for that effect. Hysteresis is the common engineering term for the same effect. Always a good day when I learn something new.
Do the AEM gages also record data? I assume sample rate when data logging should also be as fast as feasible or is there a preferred rate?
Hysteresis very well may be a more accurate way of saying it.. but for some reason latency stuck in my head so I used that
10-27-2016, 07:02 PM
