What datalog rates are you guys using?

#1

As a few of you may know, I’m trying to develop a low cost Arduino based datalogging system for my E30 that I’m slowly preparing.

Anyways, I think I have the sensor part figured out. Now I’m trying to figure out what datalogging rates the Arduino is capable of.

To those of you with off the shelf dash loggers/data logging systems, at what rates are you logging things like oil pressure, oil temperature, etc?

Personally I feel like 10 samples/second would be sufficient (36,000 data points for an hour long race) but I really have no idea so I’m looking for your guys’ input.

#2

copy and paste from my iq3 manual

Accelerometer Specifications
Sample Rate 100HZ - 3 Axis
Accuracy 1% (excluding vibration affect)
Minimum / Maximum Values +5 / -5
GPS Information
GPS logging rate 4 Hz with 100HZ inertial assistance
Channels 16
Antenna High Gain / Active
Accuracy 2.5 Meters
Cold start / Hot start satellite sync time 34 seconds cold / less than 3.5 seconds hot
Memory
Maximum micro SD Card Size
512MB microSD Flash - Included
2GB Maximum
Data Writing Rate 17Kb / sec
Resolution (ADC)
Data Logger 10 bit
Processor Speed 20MHz
Sample (Logging) Rates of Data Channels
IQ3 Internal Channels 100 Hz Maximum, user adjustable to 1 Hz
Vnet Channels 100 Hz Maximum, user adjustable to 1 Hz