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Old 02-28-2008, 09:10 PM   #21 (permalink)
Did you get that thing?
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Join Date: Jan 2008
Location: Buffalo NY
Posts: 162

Green Machine - '92 Honda Civic LX
90 day: 39.98 mpg (US)

Money pit - '97 Infiniti j30
90 day: 22.74 mpg (US)
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As far as the portables, it varies, usually Delphi, Harmon Kardon, or Garmin lately. Sometimes Pioneers version the avic S1. The in-dash units are mostly Pioneer, some Eclipse, some Alpine (years ago) and a few Panasonic. I personally switched from the Delphi, to the Pioneer in-dash, and its a world of difference.

I also forgot to mention that the in-dash units have a built in gyro sensor to compliment the GPS, which makes them more accurate as far as location goes. You seem to know more about the actual workings of GPS than I do, I just put them in, take them for a test drive to make sure everything functions within tolerance, and send them on their way. So I will say I believe you that speed and location are different.

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