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Originally Posted by MetroMPG
This sounds like a question to ask Ron at Linear Logic. I've always found him to be very responsive to specific questions.
I've also seen this behaviour. On a recent trip with the car warmed up, flat roads, negligible wind, approx 45-50 mph, I watched the SG "instant" screen toggling exclusively between 66 mpg and 83 mpg (no intermediate values), and I could influence which I saw with an imperceptible movement of the throttle.
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Well! Someone finally sees the light! The Scangauge is merely a voltage...computed from other voltages (GPM, RPM, velocity,etc.). I have always had my doubts about these variables and how they are generated. Someone put together a circuit board which computes (divides / multiplies) these & gives a final voltage ... a number on the screen.
But... one has to consider the accuracy of these inputs. Traditionally, they don't reflect the real world (as seen in the grossly inaccurate swinging of the numbers)! Comments?
smartzuuk 
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