Quote:
Originally Posted by larrydag
One thing comes to mind. Is it practical for instantaneous FE or is it just for data logging?
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Yep, this should give MPG (or one should be able to re-write it too). I'm not sure the exact math to derive MPG from the
OBD primitives, but something like (MPH/RPM)*X should do it. 'X' would be derived in part from your displacement. That's a real super dumbed down way to get MPG but it's better than nothing. I know the commercial gauges key off of speed an manifold pressure (for what it's worth).
EDIT:
[QUOTE=dcb;24089]Note that you can do the mpg part with just a laptop/carPC/tablet (with a sound card), running almost any operating system on any fuel injected car:
http://planetchampions.org/diympggauge/Too cool. I know Prius guys used to tap a line with a curcuit so they could "listen" to the High Volt system. They could tell regen, assist and other things to a degree you couldn't see on the dash. Piped it out through the system speakers. All signal processing was done with the Cranium™ Hu OS (ears
).
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