The sample rate is only about 3hz :bugeye: That's the best the OBD2 has to offer on ISO vehicles...
The first sample is usually junk. I posted the raw values but for graphing that initial value is discarded.
Delta ms.
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Thanks for the reply. It's for a pda application that reads info from the OBD2 port. The time stamp should be ms... It's not relative to real time, just a timer. It does not reset when logging begins, perhaps that's the confusion?:confused:
What's kind of odd is that one car is providing...
I'm trying to calculate a vehicles bhp based on acceleration.
I'm using RPM time stamped in milliseconds.
Tire Dia= 0.62738 meters
R&P= 3.23
3rd Gear= 1.66
Mass= 1500 Kg
Wheel speed= Engine RPM/(R&P*Gear)
Velocity= WS*Tire Dia*0.0523598
M*(Dia/2)*1000*((v2-v1)/(t2-t1))=Nm...