View Single Post
Old 11-26-2007, 10:26 AM   #197 (permalink)
MetroMPG
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 20,785

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

MPGiata - '90 Mazda Miata
Last 3: 51.27 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 58.31 mpg (US)
Thanks: 2,638
Thanked 5,544 Times in 2,845 Posts
12-12-2006, 06:55 Pm

Also been reading up on motor "red lines". The tag on "Otis" (the motor's nickname from now on, now that I know who made it ) doesn't say what it is.

I think it's safe max speed is in the neighbourhood of 3-5K RPM for typical series wound motors from a few things I've read. We need to know these things to plan what gear to be in

Here's a good account (with great pics) of someone blowing apart his Civic Wagovan's motor about a week after he got it on the road. He calculated afterwards that he spun it up to about 6K when the commutator went kablooie and blew its brains out on the pavement. (He also perservered in good humour and just had it rebuilt by the same motor guru who explained Otis' brush timing to me.)

Some of the good purpose-built EV motors are apparently good to 10k (kevlar straps on the rotor, etc).
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



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
  Reply With Quote