Quote:
Originally Posted by NeilBlanchard
I think it depends on the motor used? The SIM-LEI has the one of the lowest Wh/mile of any electric car (~134Wh/mile @ 55MPH) and it has four wheel direct drive. The Edison2 VLCe is ~108Wh/mile @ 45MPH average and it has only one speed with the final drive being chain in a reduction ratio.
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You need to be doing something other than constant speed to see any benefit for multipe gears.
Quote:
Originally Posted by NeilBlanchard
...It is hard to shift an electric car, and it takes a massively strong clutch, as well. The 7 totally ruined their racing grade clutch, and they have to shift it when stopped without it.
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Why mess with a clutch? Who says they have to shift it when stopped without one?!? Who is saying it is hard to shift one?!? You wait till motor rpm is in sync and you shift (or add software to your controller to dial in the motor rpm for your speed for the next gear). The racing clutch was still metro sized on a 3300 lb, ~300hp car, apples and oranges. Why is this such a hard concept?
My one and only two speed EV was trivial to switch gears, just hit the reverse switch
http://ecomodder.com/forum/showthrea...ter-14889.html