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  • Refresh rate

    Does anyone know if the refresh rate for displaying RPMS and Speed happen often enough to base driving on the info?

  • #2
    My reader says it can do update rates up to 35 Hz, depending on protocol and how many codes you're reading. This is certainly fast enough for speedo. When I am reading all codes, the tach readout lags quite a bit. I'll have to try limiting codes to just RPM and Speed and see how it does.
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    • #3
      It depends on how many values you are requesting at the time. If only one (mph) then it will have a faster refresh then if you are asking for two (mph / rpm), and so on. With a quality / well engineered OBD2 hardware / software, the car is the slowest link in the chain as far as updating frequency.

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