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Old 11-30-2008, 11:00 AM   #784 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,527

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 54.46 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car Mirage - '14 Mitsubishi Mirage ES (base)
90 day: 62.14 mpg (US)
Thanks: 4,078
Thanked 6,976 Times in 3,612 Posts
Quote:
Originally Posted by elanmel View Post
Add me to the list of folks who have read all your posts on this project
Congratulations. Your prize is ... learning from our mistakes!

Quote:
I would like to get up to 55 MPH at least so I can pop onto the freeway for a few miles when I need to. I'm only looking for 20-30 miles range, though, so I think 72 volts sounds right.
I'm with Ben: I think you'd be hard pressed to get to 55 mph in "normal" traffic with a 72v car, unless you're going downhill, with the Santa Ana winds at your back. I'd consider 90v a minimum for occasional highway duty. And you'd measure acceleration to 55 mph with an hourglass.

Quote:
In an earlier message you briefly discussed overvolting your motor, but haven't done so yet.
Nope. But the Motor Expert Husted said we could probably safely overvolt the motor in the car to 120v without problems.

Overvolting DC motors is common. The issues you have to deal with are: heat dissipation and brush timing.

Good luck with your project!
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Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
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