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Old 12-26-2007, 04:16 PM   #514 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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Blackfly - '98 Metro
Team Metro
90 day: 67.07 mpg (US)

ForkenSwift - '92 Metro EV
90 day: 125.37 mpg (US)

U.F.O. - '00 Insight
Team Honda
90 day: 85.75 mpg (US)
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Well, a bit of free time over the holiday, curiosity and a gift to myself (in the form of a free pass for some guilt-free, aimless motoring) = new data about the ForkenSwift...



Neither Ivan nor I have done anything other than sub/urban driving so far, so this afternoon I headed the other direction and drained most of a charge in one fell swoop on a stretch of road/highway with no stops/lights.

Speed limits were 50, 60 & 80 km/h in different sections. I was going faster than 2 of the 3 speed limits at various points in the drive, but I only broke the law in one speed zone (it's a puzzler!).

Notable observations:
  • New top speed (maintained, briefly, on flat road): 66 km/h (41 mph) - with gravity assisted acceleration part of the way there.
  • It seemed to take about 120A @ 44.8v, or 5.38 kW, to maintain 55 km/h on what appeared to me to be a level bit of road (though that's something which is notoriously hard to eyeball).
  • So then, for most of the drive, the pack was delivering over 120A.
  • Distance travelled: 18 km - that's the farthest the car has gone on a charge in winter driving (dry roads; temp around 0 C).
  • It's also the longest the pack & cabling has been subjected to sustained current of that magnitude. As soon as I got home I went around and touch tested all the major connections - they were all cool. Good sign.
Based on distance travelled & SOC of the batteries at the end of the drive, I think it was a pretty efficient run - maybe even better than the very careful sub/urban driving I've been doing - which also includes a lot of coasting.

Anyway, I'll know the answer to that question tomorrow morning when I check the kill-a-watt meter on the charger. Stay tuned...
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www.MetroMPG.com - fuel efficiency info for Geo Metro owners
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