Quote:
Originally Posted by PST
Lately we've been happy with 33 psi, and dropped it even lower than that for some super-hot sessions.
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With all the talk about high tech datalogging, have you tried the oldschool tire check using chalk up the sidewalls?
I "inherit" used Hoosier R7s from my brother who has a racecar about 500 lbs heavier than mine.
He runs them at ~32 PSI so I started there.
But after checking with chalk, I see I can go down to about 22 PSI.
Then after getting 1.5 inch wider wheels with the same tire I was able to go down another 2 PSI.
Quote:
Originally Posted by PST
As far as the cost goes, you've got to remember that price doesn't come from the electronics near as much as it comes from the hardened case, mil-spec equivalent connectors, Raychem boots, etc. You can absolutely piece together the same sensors from Sparkfun or Adafruit and log everything with an Arduino or RPi, but it won't survive. I know you already know that, but I just wanted to emphasize that fact for anyone else reading this.
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That's funny, because my datalogger is built from components from Sparkfun (I actually drive by their warehouse every day).
The IR sensors I am considering (MLX90614) are also from Sparkfun, but are likely the same as the sensors in high end handheld units.
For those units you can set the emissivity of the thing you are measuring AND it has an internal temp compensation.
So I am guessing measurements will be within a few degrees absolute, and tenths of a degree relative.
I do aerospace for a living, so building it into a ruggedized unit is standard.