Craig, I have a few questions for you

[6PacktoGo]

Craig,
I'm building a data aquisition system for my dyno, using GM sensors and a desktop computer. I need to find some data tables that correlate sensor voltage to actual data. I have data aquisition cards that will log the data via voltage, I just need the tables so I can convert the sensor voltage to temperature, pressure, A/F ratio (O2 sensor), and air flow (MAF). I plan to use a coolant temp sensor, a MAT sensor, a MAP/Baro sensor, a MAF sensor, and several O2 sensors. If you have any suggestions for which particular sensors I should get, I'd be very happy to have that too. How fast should I sweep them, and how accurate are they? My dyno is a Kahn, 1,000 horsepower, 10,000 RPM capacity. We already have the torque, RPM, and a couple of other functions actually logging.
Thanks,

 

[Craig Smith]

You could proabably use the same sensors we use with our EFI systems. Shop for a 1990 Camaro with a 350 for the MAP, coolant, and air temp sensors. As for a MAF sensor, I coudn't help you there. Everything we do is speed/density so I have no experience with MAF sensors.

As far as voltage vs. temp, you can figure this out yourself rather easily. Simply heat some water in the microwave, stick a temperature probe in the water, and record the resistance of the sensor at several different temps. The voltage that would correlate with a particular temp depends on the circuitry used to read the temp sensors. The sensors will be just as accurate as the info in your conversion table.

 

[6PacktoGo]

Thanks Craig. Do you have any opinions on O2 sensors? I need to be able to measure A/F ratio in order to know if my BSFC calculations are accurate.
Thanks,